JP4520775B2 - Non-opaque paint color matching method, painted product manufacturing method, non-opaque paint color matching device, painted product manufacturing device, and program thereof - Google Patents

Description

  The present invention relates to a transparent coating component in a non-hiding coating so that the non-hiding coating comprising a transparent coating component and one or a plurality of basic color materials is applied to a base material so that the color is substantially the same as that of a color sample. In addition, the present invention relates to a color matching method for a non-hiding paint that determines the blending ratio of each basic color material color, a method for manufacturing a coated product, a color matching apparatus, a painted product manufacturing apparatus, and a computer program therefor.

Conventionally, for enamel-based paints that conceal the base material, when calculating the blending ratio of color materials for blending a desired color paint, computer color matching using optical density (K / S) according to Kubelka-Munk's formula ( In the following, it is possible to perform color matching with sufficient accuracy by obtaining the blending ratio of the color materials by CCM).
For example, in Patent Document 1, a color having a small color difference is retrieved from colors stored in advance with respect to the color of the color sample, and a color closer to the color sample is exhibited by further correcting (correcting) this color. About a color material, what obtains the compounding ratio of the color material of the basic color in it is described.

Japanese Patent Publication No. 5-27813

  However, for example, when a wooden material is used as the base material, a non-hiding paint that allows the base to show through is often used. In this case, since the color of the coated object includes the influence of the material color of the base material (for example, the wood material), even if the CCM for the concealing paint as described above is applied, the sample material is used. Depending on the color (target color), the mixing ratio of the basic color material cannot be calculated, or even if it can be calculated, the appropriate color mixing ratio may not be obtained. There is.

  In color matching using the Kubelka-Munk formula, the optical density of the basic color material is used. When applied to a non-hiding paint, the total of the basic color materials blended in the non-hiding paint is used. The proportion (total blending ratio) is fixed, and the blending ratio of the basic color materials is adjusted. In other words, when the blending ratio of the paint with a color approximated to a certain degree is obtained, this technique fixes the total blending ratio of the basic color materials in the paint to bring the colors closer together. There was no choice but to adjust the compounding ratio of the materials.

On the other hand, when the inventor obtained a paint having a color approximated to some extent to the color sample, the basic color material in the obtained paint is obtained by adding a transparent film component to the paint to make the color lighter. It was found that color matching could be easily performed by changing the total blending ratio.
In addition, for a coated object to which a non-opaque paint is applied, the lightness L * of the painted object and a colorless and transparent paint obtained by removing the basic color material from the non-opaque paint as a base material (a transparent film not including the basic color material) It has been found that there is a certain relationship between the lightness L * ₀ of the coated product produced by applying the paint containing only the component) and the total blending ratio D in the non-hiding coating used.

  The present invention has been made in view of such problems and knowledge, and for a non-hiding coating composed of a transparent film component and at least one of the basic color materials, the transparent film component and each basic color material are suitable. The object is to provide a color matching method capable of calculating or instructing a blending ratio, a manufacturing method of a coated object, a color matching apparatus, a coating object manufacturing apparatus, and a program for causing a computer to function as each unit of the color matching apparatus. .

Its solutions is a homogeneous color matching method unmasked paint to be applied will be the base material and a transparent film component and one or more basic color material relates swatch, swatch color containing lightness L * _ST A sample color data acquisition step for acquiring data, a base material lightness acquisition step for acquiring the lightness L * ₀ of the base material, and an approximation of an approximate color paint having a color similar to the color represented by the sample color data Approximate color data acquisition step for acquiring approximate color paint data including the blend ratio of the transparent coating component of the non-hiding approximate color paint applied to the approximate color paint and each basic color material. And the lightness L * ₀ and L * _ST , the lightness L * of the approximate color paint obtained from the approximate color paint data, and the total blending ratio D of each basic color material in the approximate color paint, The above approximate color paint is the relationship between basic color materials A recommended blending ratio calculating step of obtaining a recommended blending ratio of the recommended paint with respect to the non-opaque paint , wherein the blending ratio is the same and the total blending ratio D _RE of each basic color material is different . It is.

The color matching method of the present invention, the lightness L * ₀ given in response to the kind of the base material obtained in each step (hereinafter, also referred to as lightness L * ₀ of the base material.) And, lightness L * _ST relates Swatches (Hereinafter also referred to as sample brightness L * _ST ), lightness L * of the approximate color paint obtained from the approximate color paint data, and the total composition of each basic color material in the approximate color paint applied to the approximate color paint By using the ratio D, the approximate blending color paints obtain the recommended blending ratios of the recommended paints in which the blending ratios of the respective basic color materials are the same and the total blending ratios D _RE of the respective basic color materials are different.
Thus, this method makes it possible to easily obtain the recommended mixing ratio of the recommended color-matched paint by making the total mixing ratio D _RE of each basic color material different from the reference approximate color paint unlike the conventional one. it can.

  The lightness L * of the approximate color paint used in the recommended blend ratio calculation step for obtaining the recommended blend ratio is the lightness value in the color data included in the approximate color paint data or the brightness calculated from this color data. A value can be adopted. Alternatively, an approximate color paint for actual measurement is created using the approximate color paint data, and this is applied to the base material to create an approximate color paint for actual measurement. You may do it.

In the base material lightness acquisition step, the lightness L * ₀ of the base material is acquired. Specifically, for example, those from the lightness L * ₀ of the base material which has been stored for each type of pre-ground material, selecting a lightness L * ₀ of the base material corresponding to the type of a given substrate material Is mentioned. Also, the lightness L * ₀ of the base material can be measured. Specifically, a colorless transparent paint that does not include each basic color material but includes a base (transparent film component) is applied to the specified base material, and an approximate color paint for measuring the lightness of the base material is created separately. Using this, the lightness L * ₀ of the base material can be actually measured.
In addition, when the desired paint is a paint finished by applying a colorless and transparent clear paint one or more times after applying the non-hiding paint, apply the non-hiding paint to the base material. Instead, the clear paint may be applied a predetermined number of times to produce a coated material for measuring the lightness of the base material, and the lightness may be measured to obtain the lightness of the base material.
Further, in this case, an uncoated part of the non-hiding paint is formed on a part of the approximate color paint for L * actual measurement, and then the clear paint is applied to the entire part including the uncoated part a predetermined number of times. This is applied to produce an approximate color paint, and the brightness L * of the approximate color paint for this measurement is measured, and the brightness of the non-hiding paint uncoated part is measured. May be the lightness L * ₀ of the base material.
Whether the value on the data stored in advance as the lightness L * ₀ of the base material or the measured value is used depends on the lightness L * ₀ of the base material that is specified and stored in advance. On the other hand, it may be determined in consideration of the variation in the lightness L * ₀ of the base material actually used.

In addition, as a color matching method in this specification, it is only necessary to calculate or indicate an appropriate blending ratio (recommended blending ratio) between the transparent coating component and each basic color material. For example, the recommended blending of the transparent coating component and each basic coloring material It is sufficient that the ratio can be presented to the operator or the like. Further, it may be included in a dispenser or the like separately prepared until data indicating the discharge amount of the transparent coating component and each basic color material is output according to the obtained recommended blending ratio. Furthermore, using a dispenser and discharging a transparent film component and each basic color material from the dispenser according to the calculated recommended blending ratio and mixing them to produce a paint toned can also be included.
The base material refers to a base material to which a non-hiding coating is applied, and examples thereof include a wood material such as a wood board, a metal material, a plastic material, and a paper material.
As a kind of base material, the kind which distinguishes materials, such as a wood material, a metal material, a plastic material, and a paper material, is mentioned. Further, for example, in terms of wood material, there is a difference in the material of the wood material (a veneer) such as a beech, a bag, and a nara. Depending on the wood material, for example, the same material wood material, such as bright or dark, may have a different color tone. In such a case, the distinction of the difference can be included in the type. In addition, depending on the material, there are types depending on the difference in the degree of finishing.
The transparent film component is a component that can form a transparent film, and examples thereof include a transparent resin and a monomer.
The basic color material is a colored component contained in a paint, and examples thereof include pigment pastes that exhibit white, black, red, yellow, and the like.

In addition, the sample color data acquisition step for acquiring sample color data includes measuring the spectral reflectance of the sample as a color sample directly with a spectrophotometer, etc., and acquiring the measured sample color data through an interface. Is mentioned. In addition, data such as spectral reflectance data and CIELAB created or measured separately may be acquired as sample color data through communication such as the Internet or a storage medium such as a CD-ROM.
When sample color data is obtained using a sample, any sample may be used as long as it is a color sample. For example, there is a sample coating product obtained by applying an unknown or known non-hiding paint to the base material, such as an actual product to be reproduced by the color matching apparatus of the present invention.

The approximate color data acquisition step includes, for example, a method of selecting approximate color sample paint data having a color close to a sample from a plurality of sample paint data as approximate color paint data, or a known combination. There is a method of acquiring data of a paint and a starting paint exhibiting a color close to a sample on which the paint is applied.
The approximate color paint data is data that can represent the color of the approximate color paint, and includes or obtains CIELAB (L *, a *, b *) such as lightness L *. This data and sample color data can be used to calculate the color difference, compare the optical density, etc., and the data may be of a type that can evaluate the difference between the sample paint and the sample color. For example, in addition to CIELAB (L *, a *, b *) of the sample coating or starting coating, spectral reflectance, tristimulus values (X, Y, Z), and the like can be given.
Also, the sample color data is data that can represent the color of the color sample, and includes or can obtain the CIELAB (L *, a *, b *) such as the lightness L * _ST. It only has to be. For example, color sample CIELAB (L *, a *, b *), spectral reflectance, tristimulus values (X, Y, Z) and the like.

According to a second aspect of the present invention, there is provided a solution for color matching of a uniform non-hiding paint, which comprises a transparent film component and one or more basic color materials and is applied to a base material. * Sample color data acquisition step for acquiring sample color data including _ST , base material lightness acquisition step for acquiring the lightness L * ₀ of the base material, and sample coating in which a non-hiding sample paint is applied to the base material in advance Sample paint data relating to a sample, the sample color from among a plurality of sample paint data having the transparent film component in the applied sample paint, the blending ratio data of each basic color material, and the color data of this sample paint A sample selection step of selecting approximate color sample paint data of an approximate color sample paint having a color similar to the color represented by the data, and the lightness L * ₀ and L * _Using the lightness L * of the approximate color sample paint obtained from _ST and the approximate color sample paint data and the total blending ratio D of each basic color material in the approximate color sample paint, the approximate color sample paint is A recommended blending ratio calculating step for obtaining a recommended blending ratio of the recommended paint with respect to the non-hiding paint, wherein the blending ratios of the basic color materials are the same and the total blending ratio _DRE of the basic color materials is different . This is a color matching method for a conductive paint.

In the color matching method of the present invention, the lightness L * ₀ regarding the base material obtained at each step, the lightness L * _ST regarding the sample, the lightness L * of the approximate color sample paint obtained from the approximate color sample paint data, and the approximation Using the total mixing ratio D of each basic color material in the approximate color sample paint applied to the color sample paint, the approximate color sample paint has the same mixing ratio between the basic color materials, The recommended blend ratios of recommended paints having different total blend ratios D _RE are obtained.
Thus, by this method, unlike the conventional color sample paint, the total blend ratio D _RE of each basic color material is different from that of the reference color sample paint referred to, and the recommended blend ratio of the color-matched recommended paint can be easily obtained. Can do.

The lightness L * of the approximate color sample paint used in the recommended blend ratio calculation step for obtaining the recommended blend ratio is the lightness value in the color data included in the sample paint data or the brightness calculated from this color data. A value can be adopted. Alternatively, an approximate color sample paint for actual measurement is created using the approximate color sample paint data, and this is applied to the base material to create an approximate color sample paint for actual measurement. * May be measured.
In the base material lightness acquisition step, the lightness L * ₀ of the base material is acquired. Specifically, there is one that selects the lightness L * ₀ of the base material according to the type of the specified base material from the lightness L * ₀ of the base material previously stored for each type of base. . It is also possible to actually measure the brightness of the base material. A colorless transparent paint consisting of a base (transparent film component) obtained by removing each basic color material from a non-hiding paint, that is, a paint containing a transparent film component without a basic color material is applied to the base material, and the lightness of the base material A sample paint for measurement is separately prepared, and the lightness L * ₀ of the base material can be measured using this.
In addition, in the case where the coated product is a coated product that is completed by applying a colorless and transparent clear coating one or more times after applying the non-hiding paint, without applying the non-hiding paint to the base material. Alternatively, a clear paint may be applied a predetermined number of times to produce a sample coating for measuring the brightness of the base material, and the brightness may be measured to obtain the brightness of the base material. Furthermore, in this case, an uncoated part of the non-hiding paint is formed on a part of the approximate color sample paint for actual measurement, and then the clear paint is applied to the entire part including the uncoated part a predetermined number of times. Then, an approximate color sample painted product is manufactured, and in parallel with the actual measurement of the lightness L * of the approximate color sample painted product for actual measurement, the lightness of the non-hiding paint uncoated portion is measured. This may be the lightness L * ₀ of the base material.
Whether the value on the data stored in advance or the measured value is used as the lightness L * ₀ of the base material is measured with respect to the lightness L * _{0 of the} base material specified and stored in advance. This should be determined in consideration of the variation in the lightness L * ₀ of the base material.

Further, the color data of the sample paint is data that can represent the color of the sample paint, and the data including the lightness L * or the data that can be obtained. The color difference can be calculated and the optical density can be compared, and it is sufficient that the data is of a kind that can evaluate the difference between the sample paint and the sample color. For example, the spectral reflectance of a sample paint, CIELAB (L * a * b *), tristimulus values (X, Y, Z) and the like can be mentioned.
The sample color data includes the lightness L * _ST , and the sample color data and the color data of the sample paint can be used to evaluate the difference between the sample paint and the sample color. That's fine. For example, spectral reflectance of color samples, CIELAB (L * a * b *), tristimulus values (X, Y, Z), and the like can be given.
In addition, the sample color data acquisition step for acquiring sample color data includes measuring the spectral reflectance of the sample as a color sample directly with a spectrophotometer, etc., and acquiring the measured sample color data through an interface. Is mentioned. In addition, data such as spectral reflectance data and CIELAB created or measured separately may be acquired as sample color data through communication such as the Internet or a storage medium such as a CD-ROM.
When sample color data is obtained using a sample, any sample may be used as long as it is a color sample. For example, there is a sample coating product obtained by applying an unknown or known non-hiding paint to the base material, such as an actual product to be reproduced by the color matching apparatus of the present invention.

In the color matching method of the present invention, the sample selection step uses CIELAB (L *, a *, b *) to determine the color difference (Δ) between the sample color data and the color data in the approximate color sample paint data. E = √ (ΔL * ² + Δa * ² + Δb * ² )), and this is a minimum color difference sample selection step for selecting approximate color sample paint data having color data that minimizes this color difference. It is preferable to use a color matching method for non-opaque paints. In this way, by using the color difference (ΔE), it is possible to easily select the approximate color sample paint product data.

Further, in the color matching method described above, the sample selection step includes a saturation difference ΔC (= √ (Δa * ²⁾ when there are a plurality of approximate color sample paint products having color data that minimizes the color difference. + Δb * ² ) is preferably a color matching method for a non-hiding paint including a minimum saturation difference sample selection step for selecting approximate color sample paint data having color data that minimizes + Δb * ² ). In a coated product in which a non-hiding paint is applied to the base material, even when the color difference (ΔE) is the same, the chroma difference ΔC on the a * -b * plane is smaller than when the lightness difference ΔL * is small. The smaller the color, the more likely the colors look similar, and in this way, more appropriate approximate color sample paint data can be selected.

According to a third aspect of the present invention, there is provided a solution means for color matching of a uniform non-hiding paint comprising a transparent film component and one or a plurality of basic color materials and applied to a base material. A sample color data acquisition step for acquiring sample color data including L * _ST , and a known blended paint having a known coating ratio data of the transparent film component and each basic color material and having a non-hiding property. For a known blended paint in which the starting paint applied to the base material exhibits a color similar to the color sample, a known paint data acquisition step for acquiring the blending ratio data, and a starting paint in which the known blended paint is applied to the base material the starting coated object data obtaining step of obtaining the starting coated article data including color data can be calculated color data or the lightness L * containing lightness L * of the object, the base to obtain the lightness L * ₀ of the underlying material A brightness acquisition step, using a total blending ratio D of each basic colorant in the lightness L * and the known formulated coating of the lightness L * _0, and L * _ST and the starting coated article, the above known formulated coating, A recommended blending ratio calculating step of obtaining a recommended blending ratio of the recommended paint with respect to the non-hiding paint, wherein the blending ratio of the basic color materials is the same, and the total blending ratio _DRE of the basic color materials is different . This is a color matching method of the conductive paint.

In the color matching method of the present invention, the lightness L * ₀ of the base material obtained in each step, the lightness L * _{ST of the} sample, the lightness L * regarding the starting paint, and the basics in the known blend paint applied to the starting paint Using the total blending ratio D of the color materials, the recommended blending ratio of each of the basic coloring materials is the same as that of the known blending paint, and the recommended blending ratio of the basic coating materials is different from the total blending ratio D _RE of each basic coloring material. .
Thus, by this method, unlike the conventional method, the total mixing ratio D _RE of each basic color material is different from that of the known known coating material, and the recommended mixing ratio of the recommended color-matched coating material can be easily obtained. it can.
In addition, since this color matching method uses the color data (lightness L *) of the starting paint using a paint whose composition is already known (known paint), the sample paint that stores the data of the sample paint separately. The object database is not necessary, and the sample selection step for selecting the data of the approximate color sample paint from the object database is not necessary, so that the processing is simple.

  In addition, as the lightness L * of the starting paint used in the recommended blending ratio calculation step for obtaining the recommended blending ratio, the lightness L * can be directly measured for the starting paint with the known blending paint applied to the base material. The color measurement data of the starting paint may be acquired and the lightness L * may be calculated from this.

The color data of the starting paint is data that can represent the color of the starting paint, and the data including the lightness L * or the data that can be obtained. It is only necessary to use a kind of data that can be used to calculate a color difference, compare optical densities, and the like and can evaluate the difference between a sample paint and a sample color. For example, the spectral reflectance of the starting paint, CIELAB (L * a * b *), tristimulus values (X, Y, Z) and the like can be mentioned.
The sample color data includes the lightness L * _ST , and the sample color data and the color data of the sample paint can be used to evaluate the difference between the sample paint and the sample color. That's fine. For example, spectral reflectance of color samples, CIELAB (L * a * b *), tristimulus values (X, Y, Z), and the like can be given.
In addition, the sample color data acquisition step for acquiring sample color data includes measuring the spectral reflectance of the sample as a color sample directly with a spectrophotometer, etc., and acquiring the measured sample color data through an interface. Is mentioned. In addition, data such as spectral reflectance data and CIELAB created or measured separately may be acquired as sample color data through communication such as the Internet or a storage medium such as a CD-ROM.
When sample color data is obtained using a sample, any sample may be used as long as it is a color sample. For example, there is a sample coating product obtained by applying an unknown or known non-hiding paint to the base material, such as an actual product to be reproduced by the color matching apparatus of the present invention.

Furthermore, in the color matching method for a non-opaque paint according to any one of claims 1 to 3, the recommended blending ratio calculating step for obtaining the recommended blending ratio includes the lightness L *, L * _0. And a constant index determination step for determining a constant K and an index n using the total blend ratio D, and a total blend ratio D _{RE of the} recommended paint using the lightness L * _ST and the constant K and the index n. the D _RE = ⁿ √ containing a total compounding ratio determination step of determining in accordance with the following formula _{^{(1) ((L * 0}} -L * ST) / K) ... equation (1)
It is preferable to use a color matching method for non-opaque paints.

As a result of investigating non-hiding paints in which the total blending ratio of the basic color materials to the paint is changed while keeping the blending ratio of the basic color materials constant for the non-hiding paints of various colors, the lightness L * ₀ and brightness of the coated product after coating L *, between the total blending ratio D in applied coating, generally, formula _{(2): L * 0 -L} * ST = K · D I found that the relationship of ⁿ holds. Note that K and n are constants, and the index n is generally n = 0.4 in many cases. When K is calculated by assuming that the index n is n = 0.4, in a paint where K is small, It has also been found that the relationship of the above formula (2) is maintained when n is increased. Specifically, when K is obtained assuming that n = 0.4, for a paint having a color that satisfies K ≧ 30 (that is, the blending ratio of each basic color material), n = 0.4. It ’s fine. On the other hand, when K is calculated on the assumption that n = 0.4, for a paint having a color satisfying 20 ≦ K <30, it is preferable to recalculate K using equation (2) with n = 0.6. I found out. Further, when K is obtained assuming that n = 0.4, for a paint having a color satisfying 0 <K <20, it is preferable to recalculate K using equation (2) with n = 0.8. I found out.

From this knowledge, the lightness L * ₀ of the base material, the lightness L * of the basic paint such as the approximate color paint, the approximate color sample paint or the starting paint, having a color similar to the color sample, and the basic paint If the total blending ratio D in the basic paint (approximate color paint, approximate color sample paint, or known blend paint) used in the above is known, it can be seen that the constant K and the index n can be determined. Furthermore, if the lightness L * _{ST of the} sample that should be the target is known, in order to make the lightness L * of the basic paint equal to the lightness L * _{ST of the} sample, the total blending ratio D in the basic paint should be modified to some extent. That is, it is understood how much the total blend ratio D _RE of recommended paints should be set. The recommended paint obtained in this way has the same mixing ratio of the basic color materials as the basic paint, but has a total mixing ratio of the basic color materials different from the basic paint (that is, the color thinness is different). It has become a thing. Therefore, in the painted object to which the recommended paint is applied, the basic basic painted object has a color similar to the color of the color sample (swatch), and the lightness of the sample is L * _ST. Therefore, it is possible to obtain a coated product that is color-matched well with a color sample. Thus, according to this color matching method, it is possible to easily obtain a non-hiding paint that is appropriately color-matched.

   Furthermore, it is the color matching method of the non-hiding | pasting coating material of any one of Claims 1-4, Comprising: The said sample color data, the said approximate color coating material, the said approximate color sample coating material, or the said starting coating An initial difference determining step for comparing the color data of the object and determining whether or not the difference regarding the color is within a predetermined range, and in the initial difference determining step, the difference regarding the color is determined not to be within the predetermined range. In this case, the process proceeds to the recommended blending ratio calculating step, and when it is determined that the color difference is within a predetermined range, the transparent film component in the approximate color paint, the approximate color sample paint, or the known blend paint and It is preferable to use a color matching method for a non-hiding paint in which the blend ratio of each basic color material is the recommended blend ratio of the recommended paint.

In this color matching method, the sample color data is compared with the color data of the approximate color paint product, approximate color sample paint product, or starting paint product selected at the initial difference determination step. Here, when the difference regarding the color is not small (outside the predetermined range), the process proceeds to the recommended blending ratio calculating step to obtain the recommended blending ratio.
On the other hand, when the difference regarding the color is sufficiently small and within a predetermined range, the blending ratio in the approximate color paint, the approximate color sample paint, or the known blend paint is used as the recommended blend ratio. As a result, when the approximate color painted object, the approximate color sample painted object, or the starting painted object is a color close to the sample color, the recommended blending ratio can be obtained immediately.

  The color difference between the sample color and the approximate color paint, the approximate color sample paint, or the starting paint can be evaluated with various parameters indicating the difference between the two contrasted colors. For example, the color difference (ΔE), saturation difference (ΔC), brightness difference (ΔL), etc. may be used.

Furthermore, the first color matching step of obtaining the recommended blending ratio of the transparent coating component and each basic color material by the color matching method of the non-hiding paint according to any one of claims 1 to 4, and Includes a trial blending step for blending the recommended paint according to a recommended blending ratio, a test paint step for applying the recommended paint to the base material to produce a test paint, and a lightness L * _TR of the test paint. A prototype color data acquisition step for acquiring color data, and a difference determination step for comparing the sample color data with the color data of the test paint to determine whether or not the difference regarding the color is within a predetermined range. comprising, in the difference determination step, if the difference relates to the color is determined not within the predetermined range, the process returns to the recommended mixing ratio calculation step, instead of the lightness L *, the lightness L * _TR There, the approximate color paint, the approximate color sample paint or in place of total blending ratio D of each basic colorant in the known compounding paint, using a total blending ratio D _RE of each basic colorant in the recommended paint, the Instead of the approximate color paint data, the approximate color sample paint data, or the starting paint data and the blend ratio of the known blend paint, the color data of the test paint and the recommended blend ratio for the recommended paint are used. The recommended blending ratio of the recommended paint is newly calculated again, and when it is determined that the difference in color is within a predetermined range, the color matching method of the non-occlusion paint is preferably finished.

In the color matching method of the present invention, after obtaining a recommended blending ratio, a recommended paint is prepared according to the recommended blending ratio, and this is coated on a base material to produce a test paint. Further, color data including the lightness L * _TR of the test paint is acquired, the sample color data is compared with the color data of the test paint, and a color difference is determined. If this difference is not within the predetermined range, L * _TR is used instead of the lightness L *, _DRE is used instead of the total blending ratio D, and the recommended blending ratio of the recommended paint is used again. Calculate the recommended blend ratio. On the other hand, when the difference is small and within the predetermined range, the color matching is finished.
In this way, according to the recommended blending ratio calculated once, the recommended paint is actually blended, a test paint is prepared, the color and sample color data are compared, and if the difference is large, the recommended blending ratio is set again. obtain. Thereby, it is possible to appropriately obtain the recommended blend ratio of the recommended paint exhibiting an appropriate color.

  Furthermore, using the color matching method of the non-opaque paint according to claim 5, the transparent film component and the basic color material according to the recommended paint that are determined to have a difference in color within a predetermined range. It is preferable to provide a method for manufacturing a coated article, comprising: a color matching performing step for obtaining a recommended blending ratio; and a painting step for applying a non-hiding recommended paint prepared according to the recommended blending ratio to the base material.

  In the method for producing a coated product of the present invention, as described above, the recommended blending ratio of the recommended paint is obtained, and the recommended paint prepared according to the recommended blending ratio is applied to the base material. Accordingly, it is possible to produce a coated product appropriately matched in color.

According to another aspect of the present invention, there is provided a color matching apparatus for a uniform non-hiding paint comprising a transparent film component and one or more basic color materials and applied to a base material, Sample color data acquisition means for acquiring sample color data including lightness L * _ST , background material lightness acquisition means for acquiring lightness L * ₀ of the base material, and a color approximate to the color represented by the sample color data Approximate color paint product data of an approximate color paint product having an approximate color paint product data including the blend ratio of the transparent color component of the approximate color paint applied to the approximate color paint product and each basic color material Color data acquisition means, brightness L * ₀ and L * _ST , brightness L * of the approximate color paint obtained from the approximate color paint data, and total blending ratio D of each basic color material in the approximate color paint The above approximate color paint is a combination ratio between basic color materials. A non-opaque paint color matching device having a recommended blend ratio calculation means for obtaining a recommended blend ratio of the recommended paint with respect to the non-occlusion paint, wherein the total blend ratio D _RE of the basic color materials is the same. is there.

In the color matching apparatus of the present invention, the lightness L * ₀ of the base material obtained by the base material lightness acquisition means, the lightness L * _{ST of the} sample obtained by the sample color data acquisition means, and the lightness L * of the approximate color paint In the recommended blending ratio calculation means using the total blending ratio D of the basic color materials in the approximate color paint, the approximate color paint has the same blending ratio between the basic color materials and is the sum of the basic color materials. compounding ratio D _RE obtaining a recommendation blending ratio of different recommendation paint.
Therefore, in this color matching apparatus, unlike the conventional color paint, the total color mixing ratio D _RE of each basic color material is different from the reference approximate color paint, and the recommended color mixing recommended color mixing ratio is easy. Obtainable.

  Further, the color matching device in the present specification may be any device that can calculate or indicate an appropriate blending ratio (recommended blending ratio) between the transparent coating component and each basic color material. An apparatus for presenting a recommended blending ratio of color materials to an operator or the like through a display or a printer is included. Furthermore, a device that performs processing up to outputting data instructing the discharge amount of the transparent coating component and each basic color material to a separately prepared dispenser or the like in accordance with the calculated recommended blending ratio is included. Furthermore, the apparatus includes a dispenser, and an apparatus for producing a paint in which a transparent film component and each basic color material are ejected from the dispenser according to the calculated recommended blending ratio and mixed to perform color matching.

  In the present invention, as the approximate color data acquisition means, a means for selecting approximate color sample paint data having a color close to a sample from a plurality of sample paint data stored in advance, or a color close to a sample is exhibited. Means for obtaining data of the starting paint and paint having a known formulation applied thereto.

According to another aspect of the present invention, there is provided a color matching apparatus for a uniform non-hiding paint comprising a transparent film component and one or a plurality of basic color materials, wherein a non-hiding sample paint is previously applied to the base material. a sample coated article data relating to the applied sample coated article, mixing ratio data of the transparent film component and the basic color material in the sample paint coating cloth, and the color data, or the lightness L containing lightness L * of the samples coated product Sample paint database that stores sample paint data including color data for which * can be calculated, sample color data acquisition means for acquiring sample color data including lightness L * _ST for color samples, and lightness of the base material and the base member brightness acquisition unit that acquires L * _0, a sample coated article data in said sample coated product database, the most approximate to the color represented by the sample color data A sample selection means for selecting an approximate color sample coated product data approximate color sample coating having a brightness of the approximate color sample coated product obtained from the lightness L * _0, and L * _ST and the approximate color sample coated product data L * and by using the total blending ratio D of each basic color material in the sample coating, the upper Symbol approximate color sample coating, the mixing ratio between the basic color material is the same, the total compounding ratio of each basic colorant D _RE are different, a color matching apparatus of the non-hiding coating material having a recommended mixing ratio calculating means for obtaining a recommendation compounding ratio of the recommended paint to said non-hiding paint.

In the color matching apparatus of the present invention, the lightness L * ₀ of the base material obtained by the base material lightness acquisition means, the lightness L * _{ST of the} sample obtained by the sample color data acquisition means, and the approximate color sample paint product data were obtained. Using the lightness L * of the approximate color sample paint and the total blending ratio D of each basic color material in the approximate color sample paint, in the recommended blend ratio calculation means, the approximate color sample paint is the relationship between the basic color materials. The recommended blending ratios of the recommended paints having the same blending ratio and different total blending ratios D _RE of the basic color materials are obtained.
For this reason, in this color matching device, unlike the conventional color matching paint, the total blending ratio D _RE of each basic color material is different from the reference color sample paint referred to, and the recommended blending ratio of the recommended paint that has been color matched is easy. Can get to.

In the color matching apparatus according to the present invention, the sample selection means uses CIELAB (L *, a *, b *) to determine the color difference (Δ) between the sample color data and the color data in the approximate color sample paint data. E = √ (ΔL * ² + Δa * ² + Δb * ² )), and color matching of the non-occlusion paint that selects the approximate color sample paint product data having the color data that minimizes the color difference An apparatus is preferred. In this way, by using the color difference (ΔE), it is possible to easily select the approximate color sample paint product data.
Further, in the above-described color matching apparatus, the sample selection means may have a saturation difference ΔC (= √ (Δa * ²⁾ when there are a plurality of approximate color sample paint data having color data that minimizes the color difference. It is preferable to use a non-hiding paint color matching device that selects approximate color sample paint data having color data that minimizes + Δb * ² ) .The non-hiding paint is applied to a base material such as a woody material. In the coated product, even when the color difference (ΔE) is the same, the saturation difference ΔC (= √ (Δa * ² +) on the a * -b * plane is smaller than when the lightness difference ΔL * is small. When Δb * ² ) is smaller, colors tend to look similar, and in this way, more appropriate approximate color sample paint data can be selected.

  9. The non-opaque paint color matching apparatus according to claim 8, wherein the sample paint data stored in the sample paint database includes type data indicating a kind of the base material, respectively. The sample selection means includes the specified base material type data from the sample paint database, and most closely approximates the color represented by the sample color data. It is preferable to use a color matching apparatus for non-occlusion paint that selects approximate color sample paint data of an approximate color sample paint having a color.

  According to the color matching apparatus of the present invention, the sample paint data includes type data indicating the type of the base material, and the sample selection unit includes the sample paint including the type of the base material specified by the base material type specifying unit. Approximate color sample paint data of the closest color is selected from the object data. For this reason, in the color matching apparatus of this invention, according to the kind of the base material, color matching can be performed appropriately.

In addition, as described above, the type of the base material is different from the wood material, metal material, plastic material, paper material, etc. Further, for example, in the case of the wood material, the type of the surface material (projection board) of the wood material Then, there is another such as a bag, a beech. More specifically, the same material can be further classified according to the difference in lightness, such as bright, dark, normal. In addition, since the color matching apparatus according to the present invention relates to the non-hiding coating applied to the base material, the color tone of the coated object is affected by the color tone and finish of the surface of the base material. Therefore, as long as it affects the color tone of the coated material, it is necessary to classify according to not only the material of the base material itself but also the color tone and finish of the surface of the base material, or the paint already applied to the surface of the base material. In some cases.
In addition, the base material type designation means selects the approximate color sample paint data from the sample paint data related to the designated type of base material from the sample paint database, so that the type of the base material can be specified. It only has to be a means to do. Therefore, for example, the type of the base material can be input from the keyboard, or an appropriate one can be selected from the types of base materials displayed on the display screen with a pointing device such as a mouse. It is also possible to specify the type of the base material by communication from the outside.

According to another aspect of the present invention, there is provided a color matching apparatus for a non-hiding paint comprising a transparent film component and one or a plurality of basic color materials, wherein the sample color includes lightness L * _ST. Sample color data acquisition means for acquiring data, and a known coating composition having a known coating ratio data of the transparent film component and each basic color material and having a non-hiding property, and applying the known coating composition to the base material With respect to a known blended paint having a color similar to that of the color sample, the known paint data obtaining means for obtaining the blending ratio data, and the starting painted article in which the known blended paint is applied to the base material. Starting paint data acquisition means for acquiring color data including the lightness L * or starting paint data including color data capable of calculating the lightness L *, and a base material lightness for acquiring the lightness L * ₀ of the base material Acquisition hand When, by using the total blending ratio D of each basic colorant in the lightness L * and known formulated coating of the lightness L * _0, and L * _ST and the starting coated article, the above known formulated coating, each basic colorant A recommended blending ratio calculating means for obtaining a recommended blending ratio of the recommended paint with respect to the non-opaque paint, wherein the blending ratio of the basic colors is different and the total blending ratio D _RE of each basic color material is different . It is a matching device.

In the color matching apparatus of the present invention, the lightness L * ₀ of the base material obtained by the base material lightness acquisition means, the lightness L * _{ST of the} sample obtained by the sample color data acquisition means, the lightness L * of the starting paint, In the recommended blending ratio calculation means using the total blending ratio D of each basic color material in the known blended paint, the blend ratio of each basic color material is the same as the known blended paint, and the total blend of each basic color material The recommended blend ratio of recommended paints with different ratios D _RE is obtained.
For this reason, in this color matching apparatus, unlike the conventional known paint, the total blend ratio D _RE of each basic color material is different from the reference known blend paint, and the recommended blend ratio of the recommended paint that has been color matched is easily set. Obtainable.
In addition, since this color matching device uses color data (lightness L *) of a starting paint using a paint whose composition is already known (known paint), a sample paint that stores data of the sample paint separately. The object database is not necessary, and the sample selection means for selecting the data of the approximate color sample paint is not necessary, so that the configuration is simple.

In addition, as the lightness L * of the starting paint to be used in the recommended blending ratio calculating means for obtaining the recommended blending ratio, the lightness L * directly measured for the starting paint in which the known blending paint is applied to the base material is used. It is also possible to acquire colorimetric data of an object and use the lightness L * calculated therefrom.
The base material lightness L * ₀ is also selected according to the specified base material type from the base material lightness L * ₀ previously stored for each base type in the base material lightness acquisition means. The lightness L * _{0 of the} material can be selected. In addition, a colorless and transparent paint consisting of a base that is obtained by removing each basic color material from a non-hiding paint (known paint) is applied to the base material, and a paint for measuring the brightness of the base material is prepared separately and used. The lightness L * ₀ of the base material can also be obtained by actual measurement.

The color data of the starting paint is data that can represent the color of the starting paint, and the data including the lightness L * or the data that can be obtained. It is only necessary to use a kind of data that can be used to calculate a color difference, compare optical densities, and the like and can evaluate the difference between a sample paint and a sample color. For example, the spectral reflectance of the starting paint, CIELAB (L * a * b *), tristimulus values (X, Y, Z) and the like can be mentioned.
The sample color data includes the lightness L * _ST , and the sample color data and the color data of the sample paint can be used to evaluate the difference between the sample paint and the sample color. That's fine. For example, spectral reflectance of color samples, CIELAB (L * a * b *), tristimulus values (X, Y, Z), and the like can be given.
Sample color data acquisition means for acquiring sample color data is to directly measure the spectral reflectance of the sample to be used as a color sample using a spectrophotometer or the like, and acquire the measured sample color data through an interface. Is mentioned. In addition, data such as spectral reflectance data and CIELAB created or measured separately may be acquired as sample color data through communication such as the Internet or a storage medium such as a CD-ROM.
When sample color data is obtained using a sample, any sample may be used as long as it is a color sample. For example, there is a sample coating product obtained by applying an unknown or known non-hiding paint to the base material, such as an actual product to be reproduced by the color matching apparatus of the present invention.

11. The non-opaque paint color matching apparatus according to claim 7, wherein the recommended blending ratio calculating means includes the lightness L *, L * ₀ , and the total blending. Using the ratio D, the Kn determination means for determining the constant K and the index n, the lightness L * _ST , and the constant K and the index n, the total blending ratio D _RE of the recommended paint is expressed by the following formula (1) D _RE = ⁿ √ containing a total blending ratio determining means for determining in accordance with ^{_{((L * 0 -L * ST}} ) / K) ... equation (1)
A color matching device for non-hiding paint is preferable.

In this color matching apparatus, the recommended blending ratio calculating means includes a Kn determining means and a total blending ratio determining means, and the recommended paint obtained in this way has a blending ratio between basic color materials of an approximate color paint, The total blending ratio of each basic color material is obtained by changing the same as the approximate color sample paint or the known blend paint. The painted object to which the recommended paint is applied has a color that approximates the color of the color sample (sample) when the basic approximate color painted object, the approximate color sample painted object, or the starting painted object is further applied. Since the lightness is close to the lightness substantially equal to the lightness L * _ST of the sample, it is possible to obtain a coated product that is color-matched well with the color sample. Thus, according to this color matching apparatus, it is possible to easily obtain a non-hiding paint that is appropriately color-matched.

  Furthermore, it is a color matching apparatus of the non-hiding paint of any one of Claims 7-11, Comprising: The said sample color data, the said approximate color coating material, the said approximate color sample coating material, or the said starting coating When comparing with color data of an object and determining whether or not the difference regarding the color is within a predetermined range, the initial difference determination means determines that the difference regarding the color is not within the predetermined range The recommended blend ratio calculation means obtains the recommended blend ratio, and when it is determined that the color difference is within a predetermined range, the transparent film component in the approximate color sample paint or the starting paint and It is preferable that the color matching device of the non-hiding paint is configured so that the blend ratio of each basic color material is the recommended blend ratio of the recommended paint.

In this color matching apparatus, the sample color data is compared with the color data of the approximate color paint product, approximate color sample paint product or starting paint product selected initially by the initial difference judging means. Furthermore, when the difference regarding the color is not small (outside the predetermined range), the recommended blending ratio is calculated by the recommended blending ratio calculating means. On the other hand, when the difference regarding the color is sufficiently small and within a predetermined range, the blending ratio in the approximate color painted product, the approximate color sample painted product, or the starting painted product is used as the recommended blending ratio.
As a result, when the approximate color painted object, the approximate color sample painted object, or the starting painted object is a color close to the sample color, the recommended blending ratio can be obtained immediately.

  The color difference between the sample color and the approximate color paint, the approximate color sample paint, or the starting paint can be evaluated with various parameters indicating the difference between the two contrasted colors. For example, the color difference (ΔE), saturation difference (ΔC), brightness difference (ΔL), etc. may be used.

Furthermore, it is the non-hiding paint color matching apparatus according to any one of claims 7 to 11, wherein the test paint is prepared by applying a recommended paint prepared according to the recommended blend ratio to the base material. The prototype color data acquisition means for acquiring the color data including the lightness L * _TR of the test paint, and the sample color data and the color data of the test paint are compared. Difference determining means for determining whether or not the difference is within the predetermined range, and when the difference determining means determines that the color difference is not within a predetermined range, instead of the lightness L *, the lightness L * _{Using TR} , instead of the total blending ratio D of the basic color materials in the approximate color paint, the approximate color sample paint, or the known blend paint, the total blend ratio D _RE of each basic color material in the recommended paint is used. , The approximation Instead of the paint data, the approximate color sample paint data, or the starting paint data and the blend ratio of the known blend paint, the color data of the test paint and the recommended blend ratio of the recommended paint are used. The recommended blending ratio calculating means calculates the recommended blending ratio of the recommended paint again, and when it is determined that the color difference is within a predetermined range, the non-hiding property is configured to end the color matching. A paint color matching device is preferred.

In the color matching apparatus of the present invention, a recommended paint is prepared according to the recommended blend ratio, and this is applied to the base material, and color data including the lightness L * _TR of the test paint is obtained by the prototype color data acquisition means for the test paint. get. Further, the difference judging means compares the sample color data with the color data of the test paint, and judges the difference regarding the color. If this difference is not within the predetermined range, L * _TR is used instead of brightness L *, _DRE is used instead of total blending ratio D, and the recommended blending ratio is calculated using the recommended blending ratio of the current recommended paint. The recommended blending ratio of the recommended paint is newly calculated again by the means. On the other hand, when the difference is small and within the predetermined range, the color matching is finished.
In this way, according to the recommended blending ratio calculated once, the recommended paint is actually blended, a test paint is prepared, the color and sample color data are compared, and if the difference is large, the recommended blending ratio is set again. obtain. Thereby, it is possible to appropriately obtain the recommended blend ratio of the recommended paint exhibiting an appropriate color.

  Furthermore, the non-hiding paint color matching apparatus according to claim 12, and a coating that applies a non-hiding recommended paint in which the transparent film component and each basic color material are blended according to the recommended blending ratio to the base material. And a means for manufacturing a coated product.

The painted product manufacturing apparatus of the present invention includes a color matching device and a coating means for applying a non-hiding recommended paint to the base material. Therefore, the color-matched paint blended according to the recommended blending ratio can be appropriately applied to the base material.

  Furthermore, the computer may be a program for causing the computer to function as each unit of the color matching apparatus for the non-opaque paint according to any one of claims 7 to 12.

  According to the program of the present invention, it is possible to easily and inexpensively realize a color matching device for a non-hiding paint by causing a computer to function as each means.

  Three types of color matching apparatus, painted product manufacturing apparatus, color matching method, and painted product manufacturing method according to the present invention will be described in accordance with the following three examples.

  The color matching apparatus 300 according to the first embodiment includes a computer 10, a spectrophotometer 20, a dispenser 30, and a stirring device 40, as schematically shown in FIG. 1. The color matching apparatus 300 is controlled by a program installed in the computer 10. The computer 10 has a known configuration and serves as means for realizing various functions in accordance with a program installed in a storage medium such as a hard disk. In a storage medium such as a hard disk in the computer 10, a sample paint database 11 in which sample paint data to be described later is stored is constructed. The computer 10 is configured so that an operator can appropriately input necessary instructions or data using the keyboard 15 or the mouse 16.

The spectrophotometer 20 is a device for obtaining color data relating to the color of the sample MH, and for example, MiniScan (trade name) manufactured by HunterLab. The spectrophotometer 20 measures the sample MH, which is a color sample, measures the spectral reflectance, and inputs the data to the computer 10.
The dispenser 30 is configured so that a predetermined amount of the paint component stored in the paint tank can be discharged from the discharge nozzle using, for example, a gear pump or a cylinder pump. The amount can be adjusted. In the dispenser 30 of this embodiment, the discharge amount of each of the five paint components of the base color material, which is a transparent film component, and four basic color materials of white, black, yellow, and red is adjusted according to instructions from the computer 10. However, it can discharge. For this reason, as will be described later, the respective paint components can be prepared so that the blend ratio of these paint components becomes the recommended blend ratio.
Further, the stirring device 40 stirs and kneads the paint components discharged from the dispenser 30 by a predetermined amount to make a uniform non-hiding paint.

The completed non-hiding coating is supplied to the coating apparatus 50 and applied to a desired base material. Specifically, it includes a roll coater, a reverse scraping roll, a spray coater, a curtain coater, a UV irradiation device, a hot air dryer, and the like.
In this example, the non-hiding coating (stain) applied to the base material by the roll coater is injected and applied into the conduit of the decorative board (projection board) on the surface of the base material by the reverse scraping roll, and the surface non-covering paint is applied. The concealing paint is scraped off and dried. Thereafter, a colorless and transparent UV clear paint is primed with a roll coater and UV-dried. Further, a colorless and transparent UV clear paint is applied in the middle and UV dried. Further, a colorless and transparent UV clear paint is overcoated and UV-dried, whereby a coated object 52 is completed. Thus, the coated product 52 is manufactured by the coated product manufacturing apparatus 1300 to which the color matching paint is applied to the base material.
In addition, in order to perform color matching of the non-hiding paint, it is confirmed whether the completed test coating 51 is finished in the same color as the sample MH. It is necessary to finely adjust the mixing ratio of the color materials so that the colors become closer. Therefore, the color of the test paint 51 painted by the coating apparatus 50 is also measured by the spectrophotometer 20 to determine the suitability of the color and the necessity of further adjustment.

Next, an example of sample paint data stored in the sample paint database built in the computer 10 will be described with reference to FIG. The sample paint data in this example is the blending ratio (thousands) of the total five paint components of the base material type, base, and four basic color materials of white, black, yellow, and red. It includes the total blending ratio (thousand-percentage) of the coloring materials obtained by adding the basic coloring materials of the seeds, spectral reflectance data in the range of 400 nm to 700 nm, and L *, a *, and b * of the sample paint.
The sample paint data illustrated in FIG. 2 includes three types of base materials, wooden materials (decorative materials, and veneer), noodles, and beech. In addition, these sample paint data can be used to determine not only the mixing ratio of the four basic color materials but also the mixing ratio of the base and the total mixing ratio of the four basic color materials.

As can be seen from the sample paint data illustrated in FIG. 2, these data are different data such as the type and color of the base material, the blend ratio of the base (total blend ratio of basic color materials), etc. It has become. By holding such a large number of data, as described later, approximate color sample paint product data having a closer color can be obtained in many cases. Therefore, when a new painted product is manufactured, the data is accumulated as the sample painted product data, so that more appropriate color matching can be performed thereafter.
In addition, the sample paint data illustrated in FIG. 2 shows an example in which L *, a *, and b * are included in addition to the spectral reflectance, respectively, but the sample paint data includes L *, a *. It is also possible to include only spectral reflectance without including * and b *. In this case, when calculating the color difference in step S331, which will be described later, or calculating K in step S342, L *, a *, b * are calculated in advance and then the process proceeds to these steps.

In Example 1, color matching is performed with a non-hiding paint composed of a transparent film component and one or more basic color materials. In order to match the color of this non-hiding paint and its paint to the sample, as one of the methods, using the Kubelka-Munk formula, the total blending ratio of the basic color materials is fixed, A method of adjusting the blending ratio and bringing the color of the sample paint close to the color sample is conceivable.
On the other hand, a method for changing the total mixing ratio of the basic color materials while keeping the mixing ratio of the basic color materials fixed to bring the color of the sample paint close to the color sample is according to this embodiment.

Next, a color matching procedure in the color matching apparatus 300 and the color matching method according to the first embodiment will be described with reference to FIGS. First, sample color data such as spectral reflectance of the sample MH obtained in advance is acquired using the spectrophotometer 20 (see FIG. 1) (step S11). As shown in step S301, the obtained spectral reflectance is input to the computer 10 functioning as sample color data acquisition means, and a sample CIELAB (L * _ST , a * _ST , b * _ST ) is calculated.
Sample color data such as spectral reflectance and L * _ST , a * _ST , and b * _ST are obtained by measuring the sample MH with a spectrophotometer, and through a network system such as a LAN or the Internet. You can also

Next, in step S21, the operator inputs the type of base material from the keyboard 15, whereby the type of base material to be used is specified (step S302). The type of the base material can also be specified by specifying the display indicating the type of the base material shown on the display 10a from the mouse 16 or the keyboard 15. As described above, the sample color data can be transmitted, and the type of the base material can be transmitted and designated by communication.
In this embodiment, the lightness L * ₀ of the base material corresponding to the type of the base material is stored in a storage medium (not shown) of the computer 10. For this reason, the lightness L * ₀ of the base material is also set by designating the type of the base material.
Note that the lightness L * ₀ of the base material includes a typical base material such as an average value of a large number of measured values according to the type of the base material classified by a predetermined method (material, brightness, etc.). of the lightness L * ₀ is stored. The lightness L * ₀ of the base material is obtained by using, as a stain, a paint composed of a colorless and transparent base obtained by removing each basic color material from a non-hiding paint as a base material, and further applying a colorless and transparent clear paint as an undercoat, intermediate coat, and It is obtained by measuring the color of a painted product (sample for measuring the brightness of the base material). In addition, color measurement is performed on a coated product (measurement sample) produced by applying only the undercoat, intermediate coat, and topcoat of a colorless and transparent clear paint without applying a non-hiding paint (stain) to the base material. The brightness L * ₀ of the material may be used.
In addition, the lightness L * ₀ of the base material can be specified together with the type of the base material from a keyboard or by communication.

Next, approximate color sample paint data is selected by the subroutine shown in step S303 using the data (see FIG. 2) stored in the sample paint database 11. Specifically, as shown in FIG. 4, in step S331, first, L * _ST , a * _ST , b * _ST related to the sample MH acquired in step S301 described above and the sample paint database 11 are stored. Further, the color difference (ΔE) between them is calculated using L *, a *, and b * included in each sample paint product data. At this time, only the sample paint data relating to the type of the specified base material is used as the sample paint data. Specifically, for example, in the case where “Nara” is designated as the base material type in step S2, among the sample paint data stored in the sample paint database 11 (see FIG. 2). , L *, a *, b * respectively included in sample data of sample numbers 1 to 64 (N = 64) whose type of base material is “if”, and L * _ST , a * _ST , A total N = 64 color differences are calculated using b * _ST .
The color difference ΔE is given by ΔE = √ (ΔL * ² + Δa * ² + Δb * ² ).
Here, ΔL * = L * _ST− L *, Δa * = a * _ST− a *, and Δb * = b * _ST −b *.

In step S332 and subsequent steps, sample paint data having the smallest color difference ΔE is selected from the N sample paint data. However, there may be a plurality of data having the same color difference ΔE. Therefore, first, in step S332, the number of sample paint data having the smallest color difference among the N color differences ΔE is checked.
If the number is 1, the process proceeds to step S334, and the sample paint data (one point) having such a minimum color difference is set as approximate color sample paint data.
On the other hand, if the number is plural, the process proceeds to step S333, and further, a saturation difference ΔC is calculated and evaluated for the plurality of sample paint data. The saturation difference ΔC is a value given by ΔC = √ (Δa * ² + Δb * ² ).

  In a coated product in which a non-opaque paint is applied to a base material such as a wood material, even in the same color difference (ΔE), the color in the a * -b * plane is smaller than that in the case where the lightness difference ΔL * is small. When the degree difference ΔC is smaller, the colors tend to look similar. Therefore, if the color difference ΔE is the same, it is more appropriate to select sample paint data having a small saturation difference ΔC.

Therefore, in step S334, one point having the smallest saturation difference ΔC is selected from the plurality of sample paint data having the smallest color difference ΔE and set as approximate color sample paint data.
Thus, one approximate color sample paint data is selected from the data stored in the sample paint database 11.

Next, the process proceeds to step S335, and it is determined whether or not the following evaluation formula is satisfied. This evaluation formula is (L * ₀ −L *) · (L * ₀ −L * _ST )> 0. The evaluation formula, the sign of the difference between the lightness L * of approximate color sample coated article lightness L * ₀ of the base material (+ or -) and, with the lightness L * _ST lightness L * ₀ and samples of the base material It is evaluated whether or not the sign of the difference is different.
In this embodiment, the recommended paint having the total blending ratio D _RE of each basic color material different from the approximate color sample paint data, while the blending ratio between the basic color materials is the same as that of the approximate color sample paint data The recommended blending ratio is obtained. Therefore, the sign of the difference between the brightness of approximate color sample coated article lightness L * ₀ of the base material L * is required to be the same as the sign of the difference between the lightness L * _ST lightness L * ₀ and samples of the base material There is. The following example illustrates this. Assume that the sign of the difference between the lightness L * ₀ of the base material and the lightness L * _{ST of the} sample is “+”. In this case, it relative lightness L * ₀ of the base material small lightness L * _ST swatches, i.e., in the color sample (i.e. those that target), by applying a coating to a substrate material, lightness Indicates a drop. That is, in the color sample, it can be seen that the applied paint has a darker color than the base material. On the other hand, it is assumed that the sign of the difference between the lightness L * _{0 of the} base material and the lightness L * of the approximate color sample paint is “−”. In this case, it is shown that the brightness is increased by applying the approximate color sample paint to the base material. That is, it can be seen that such approximate color sample paint is brighter than the base material. Therefore, with respect to such a bright color approximate color sample paint, while maintaining the mixing ratio of the basic color materials (that is, without changing the color tendency), the total mixing ratio of the basic color materials (that is, the base and the color mixture). Even if only the ratio of each basic color material is changed, it is considered that the recommended paint is not darker than the base material. Therefore, when approximate color sample paint data that is a combination of such codes is selected, it is necessary to exclude it. The same applies when the color sample and the sample paint are reversed.

Therefore, when the signs of the two differences match (Yes), the approximate color sample paint data selected in step S334 is maintained, and the process returns to the main routine.
On the other hand, when the signs of the two differences do not match (No), the process proceeds to step S336. In step S336, the approximate color sample paint data selected in step S334 is abandoned, and by returning to step S332, another sample paint data can be selected as the approximate color sample paint data again in accordance with steps S332 to S334. It is determined whether or not (Yes). If YES is determined, the process returns to step S332, and approximate color sample paint product data is selected again. On the other hand, if it is determined No, the process proceeds to step S337, where it is determined that color matching is not possible depending on the change in the total blending ratio, and this procedure is terminated.
Note that by changing the type of base material (lightness L * _{0 of the} base material) (for example, changing from “dark dark” to “light bright”), it is possible to select appropriate approximate color sample paint data. Therefore, if necessary, it is possible to return to step S302 as indicated by a broken line.

  Next, the process proceeds to a subroutine of step S304, and a recommended blending ratio is calculated. Specifically, as shown in FIG. 5, from the approximate color sample paint data selected in step S303 and stored in the sample paint database 11, the total blending ratio D of the four basic color materials in step S341. Get the data. For example, when the data of sample No. 13 is selected as the approximate color sample paint data among the sample paint data shown in FIG. 2, the total blending ratio D is D = 50/1000 = 0.05 (= 5 .0%) value.

Next, in step S342, using the lightness L * of the approximate color sample paint, the lightness L * ₀ of the base material obtained in step S301, and the total blending ratio D, and assuming that the index n = 0.4, the following equation: A constant K is calculated according to (3).
_{K = (L * o -L *} ) / D n ... formula (3)
In step S343, the value of K is evaluated. As described above, when the constant K is calculated on the assumption that n = 0.4, if the constant K is small, it is preferable to recalculate the index n instead of a large value. I understand. Therefore, in this step S343, when K ≧ 30, the value of K is left as it is, and the process proceeds to step S346. On the other hand, when 20 ≦ K <30, the process proceeds to step S344, the index is set to n = 0.6, the constant K is recalculated by the above equation (3), and then the process proceeds to step S346. To do. If 0 <K <20, the process proceeds to step S345, the exponent is set to n = 0.8, the constant K is recalculated by the above equation (3), and then the process proceeds to step S346.

Thereafter, in step S346, the total blending ratio D of the recommended paint according to the formula (1) using L * _{0 of the} base material, the obtained constant K, the index n, and the lightness L * _ST of the sample obtained in step S301. Calculate _RE .
^{_{D RE = n √ ((L}} * 0 -L * ST) / K) ... formula (1)
In the recommended paint, the total mixing ratio D _RE of the basic color materials is used, while the mixing ratio of the basic color materials is the same as the approximate color sample paint data.
Therefore, in step S347, the blending ratio of the base and the four basic color materials is calculated so as to satisfy these relationships. Thus, it was possible to obtain a paint (recommended paint) in which the blending ratio of the approximate color sample paint was corrected based on the sample color data and the color matching was performed close to this using the approximate color sample paint data.

  Thereafter, returning to the main routine, as described above, in step 305, in accordance with the recommended blending ratio obtained, a non-hiding paint (recommended paint, trial paint) is prepared and applied using the dispenser 30 and the stirring device 40. A test paint 51 is made on a trial basis by applying to the specified base material using the apparatus 50.

Next, in step S306, the color of the test paint 51 is confirmed. Specifically, in addition to visual evaluation, the spectrophotometer 20 measures the color to obtain the spectral reflectance, L * _TR , a * _TR , b * _TR, etc. If the color is satisfactory, the color matching is complete.
On the other hand, if it is insufficient (when the color difference is large), the process returns to step S304. Specifically, as shown by a broken line in FIG. 5, the processing after step S341 is performed using data such as the lightness L * _TR of the test paint obtained in step S306 instead of the approximate color sample paint data. Then, the previous recommended blending ratio is corrected to calculate a new recommended blending ratio.
More specifically, as shown in FIG. 3, in step S307, D _RE is substituted for D, and a new recommended blend ratio is obtained in step S304 (step S342) in order to obtain the previous recommended blend ratio. The total blending ratio D _RE of the recommended paint obtained last time is used instead of the total blending ratio D of the known blending paint. Similarly, when substituting L * _TR into L * and obtaining a new recommended blend ratio, the lightness L * of the approximate color sample paint used in step S304 (step S342) to obtain the previous recommended blend ratio is obtained. Instead, the lightness * L _TR of the prototype 51 is used. As a result, the recommended mixing ratio of the recommended paint and the result of the test paint 51 can be reflected to obtain a new recommended mixing ratio of the recommended paint, so that the color difference from the sample (color sample) is sufficiently small. The test paint 51 and the recommended paint can be obtained early.

  In step S301, the computer 10 functions as a sample color data acquisition unit. In step S302, the computer 10 functions as a base material type designation unit and a base material lightness acquisition unit. In step S303, the approximate color sample paint product data is obtained. It can be seen that it functions as a sample selection means for selecting or an approximate color data acquisition means, and in step 304, it functions as a recommended blend ratio calculation means for obtaining a recommended blend ratio of the recommended paint. It can also be seen that in steps S342 to S345, it functions as a Kn determining means, and in step S346, it functions as a total blending ratio determining means. In step S306, it functions as a prototype color data acquisition unit and a difference determination unit.

  In the first embodiment, the recommended paint is prepared by stirring the paint components discharged from the dispenser 30 with the stirring device 40 in accordance with the recommended blend ratio of the recommended paint obtained by using the computer 10 as each means. Thereafter, the recommended paint supplied thereto is applied to the base material by the coating apparatus 50. More specifically, in this example, as described above, the recommended paint (stain) applied to the base material by the roll coater is injected into the conduit of the decorative board (projection board) on the surface of the base material by the reverse scraping roll. After coating, it is dried. Thereafter, a colorless and transparent UV clear paint is primed with a roll coater and UV-dried. Further, a colorless and transparent UV clear paint is applied in the middle and UV dried. Further, a colorless and transparent UV clear paint is overcoated and UV-dried to produce a coated product 52. Thus, by providing the color matching apparatus 300 and the coating apparatus 50, the manufacturing apparatus 1300 of the color-matched coated object 52 is obtained.

Next, specific examples (two examples) in which color matching is performed using the color matching apparatus 300 according to the first embodiment will be described.
(Specific example 1)
FIG. 6 shows a first specific example. In this example, the sample MH uses “Nara” as the base material, and the blending ratio of the base and the basic color materials of white, black, yellow, and red is 975.0, 12.5, 5.0, 5. It is formed by applying a non-hiding paint having a value of 0, 2.5 (all parts per thousand). Note that this blending ratio is just reference data, and in actual color matching, this blending ratio is not used and may be unknown (unknown). When this sample MH was measured, L * _ST = 51.56, a * _ST = 10.33, b * _ST = 24.48 were obtained as sample color data. In FIG. 6, specific numerical values are not shown for the spectral reflectance at each wavelength.

Next, color matching by the color matching apparatus according to the first embodiment will be described. In the first embodiment, the approximate color sample paint data selected in step S303 is used. In this example, it is assumed that the sample paint data of sample No. 13 is selected as the approximate color sample paint data among the data shown in FIG. The approximate color sample paint data is L * = 48.22, a * = 9.95, b * = 23.36, and the difference from the sample color data is ΔL * = 3.34, Δa. * = 0.38, Δb * = 1.12, and color difference ΔE = 3.54. The lightness L * ₀ of the base material (if it was) was set to L * ₀ = 62.70.

Therefore, when the constant K and the index n were calculated in steps S342 to S345 (see formula (3)), K = 47.9 and n = 0.4. Therefore, when the total blending ratio D _RE of the recommended paints was calculated using the formula (1) in step S346, D _RE = 26/1000 = 0.026 was obtained. In the column of the recommended blending ratio in FIG. 6, the blending ratio of the approximate color sample paint and the numerical value of each basic color material are the same, and only the base value is increased so that the total blending ratio D _RE = _26/1000 as a whole. Each value when adjusted is shown. In the column of recommended blending ratio, the blending ratio of the base and the basic color material is shown in parts per thousand.
When the color of the prototype paint obtained by applying the recommended paint of the recommended blending ratio according to the specific example 1 obtained by the apparatus and method of Example 1 was measured, L * _RE = 51.14, a * _RE = 10.11, b * _RE = 23.97. Differences from the sample color data are ΔL * = 0.42, Δa * = 0.22, Δb * = 0.51, color difference ΔE = 0.70, and color difference ΔE ≦ 1. The color was close to 0. From this, it can be seen that the color matching of the recommended paint was properly performed.

(Specific example 2)
FIG. 7 shows a second specific example. The sample MH in this example uses “Nara” as the base material, and the mixing ratio of the base and white, black, yellow, and red basic color materials is 950.0, 37.5, 1.5, 5.0. , 6.0 (all parts per thousand), and a non-hiding paint. When the sample MH was measured, L * _ST = 56.69, a * _ST = 8.71 and b * _ST = 2.15 were obtained as sample color data. In FIG. 7, specific numerical values are not shown for the spectral reflectance at each wavelength.

On the other hand, color matching by the color matching apparatus according to the first embodiment will be described. In the first embodiment, the approximate color sample paint data selected in step S303 is used. In this example, it is assumed that the sample paint data of sample No. 38 is selected as the approximate color sample paint data among the data shown in FIG. The approximate color sample paint data is L * = 53.80, a * = 8.63, b * = 21.61, and the difference from the sample color data is ΔL * = 2.89, Δa. * = 0.80, Δb * = 0.54, and color difference ΔE = 2.94. Further, the lightness L * ₀ of the base material (if Nara) was set to L * ₀ = 62.70 as in the first specific example.

Therefore, the constant K and the index n were calculated in steps S342 to S345, and K calculated as n = 0.4 in step S342 was K = 22.36. Therefore, the process proceeds to step S344, where K is recalculated with n = 0.6, and K = 35.43 is obtained.
Next, when the total blending ratio D _RE of the recommended paints was calculated in step S346, D _RE = 52/1000 = 0.052. In the column of the recommended blending ratio in FIG. 7, the blending ratio of the approximate color sample paint and the numerical value of each basic color material are the same, only the base value is increased, and the total blending ratio D _RE = _52/1000 as a whole Each value when adjusted is shown. In the column of recommended blending ratio, the blending ratio of the base and the basic color material is shown in parts per thousand.
When the color of the prototype paint obtained by applying the recommended paint of the recommended blend ratio according to the specific example 2 obtained by the apparatus and method of Example 1 was measured, L * _RE = 56.13, a * _RE = 8.59, b * _RE = 21.92. Differences from the sample color data are ΔL * = 0.56, Δa * = 0.12, Δb * = 0.23, color difference ΔE = 0.62, and color difference ΔE ≦ 1. The color was a close approximation of 0. From this, it can be seen that the color matching of the recommended paint was properly performed.

In Example 1 described above, the approximate color sample paint data includes the lightness L *, and the lightness L * ₀ of the base material is stored in advance. On the other hand, in the second embodiment, although the approximate color sample paint product data is used, an approximate color sample paint for actual measurement is prepared and applied to the base material, and the lightness L *, and it differs in that the measured lightness L * ₀ of the base material, since other portions are the same, the description of similar portions is omitted or simplified.
The color matching apparatus 400 and the painted product manufacturing apparatus 1400 according to the second embodiment have the same configuration as the color matching apparatus 300 and the painted product manufacturing apparatus 1300 of the first embodiment described above, and FIG. As shown, it includes a computer 10, a spectrophotometer 20, a dispenser 30, and a stirring device 40.

The color matching procedure of the color matching apparatus 400 according to the second embodiment differs from that of the first embodiment only in the portion indicated by the broken line in step S303 (see FIG. 4) in the approximate color sample selection subroutine. That is, after selecting the approximate color sample paint product data in step S334, in the second embodiment, in step S338 indicated by a broken line, according to the blending ratio of the approximate color sample paint data indicated in the approximate color sample paint product data, The sample paint is prepared and applied to the base material to produce an approximate color sample paint for actual measurement. Then, the lightness L * is measured. In addition, the lightness L * ₀ of the base material is measured before applying the sample paint for measurement to the base material. In addition, a portion where the approximate color sample paint is not applied is secured in a part of the approximate color sample paint, and the brightness L * of the approximate color sample paint and the lightness L * _{0 of the} base material are measured in succession. You may be able to do it. After actually measuring the lightness L * of the approximate color sample paint and the lightness L * _{0 of the} base material, using these values, in the same manner as in Example 1, the constant K, the index n, and the total blending ratio of the recommended paints What is necessary is just to calculate _DRE and a recommendation compounding ratio.
By using the measured lightness L * of the approximate color sample and the lightness L * ₀ of the base material as in Example 2, more appropriate color matching that matches the color of the base material actually used is used. As a result, the color-matched coated object 52 is manufactured.

  In Examples 1 and 2 described above, color matching was performed using approximate color sample paint data selected from the sample paint data stored in the sample paint database 11. In this way, if sample paint data of various colors is accumulated, appropriate color matching can be performed even for samples of various colors. In addition, by further accumulating the data subjected to color matching as sample paint data, it is possible to perform color matching more appropriately and with a smaller number of times.

In the first and second embodiments, the approximate color sample paint data close to the color of the color sample (swatch) is selected from the sample paint data stored in the database 11, and color matching is performed using this. Went. On the other hand, the third embodiment is different in that the color matching of the paint is performed using a known combination paint given in advance and a starting paint to which the paint is applied. However, since the other parts are the same, the description of the same parts is omitted or simplified.
A color matching apparatus 500 and a painted product manufacturing apparatus 1500 according to the third embodiment have the same configuration as the color matching apparatus 300 and the painted product manufacturing apparatus 1300 of the first embodiment described above, and FIG. As shown, the color matching device 500 includes a computer 10, a spectrophotometer 20, a dispenser 30, and a stirring device 40, and the painted product manufacturing device 1500 further includes a coating device 50. However, the sample paint database 11 is not included.

Next, a color matching procedure in the color matching apparatus 500 according to the third embodiment will be described with reference to FIGS. First, sample color data such as spectral reflectance, CIELAB (L * _ST , a * _ST , b * _ST ) of the sample MH obtained in advance is acquired (step S401). In step S31 for acquiring the sample color data, the sample MH is directly measured using the spectrophotometer 20, and the sample color data obtained in advance may be taken in via a recording medium or a network.
In addition, the type of the base material (the material of the wood material (the veneer), the finish, the brightness, etc.) is also taken in from the sample data in step S402.

  Next, the known blend paint data (S41) given in advance is acquired (step S403). Further, in step S404, a paint is prepared according to the known paint data to obtain a known paint, which is applied to the type of base material specified in step S402, and a starting paint 53 having a color approximate to the sample is obtained. obtain. Specifically, using a known blended paint as a stain, a clear paint is applied three times (undercoating, intermediate coating, and topcoating) and drying is repeated to prepare a starting coating 53. In addition, an area where only the clear paint is applied is formed on a part of the surface of the starting paint 53 without applying the known blend paint (stain).

In step S405, the color of the starting coating 53 is measured by the spectrophotometer 20 to obtain data such as L *, a *, b *. In addition, in this starting coating 53, the color of the portion where only the clear coating is applied without applying the known blended coating is measured, and the data L * ₀ , a * ₀ , b * _0, etc. of the base material are measured. Get.

Next, the process proceeds to step S406, and the colors of the starting paint 53 and the sample MH are compared. Specifically, the color difference ΔE (= √ (ΔL * ² + Δa * ² + Δb * ² )) between the two is calculated using Lab, and the magnitude is below a predetermined value (OK). If there is, it is determined that the following color matching is unnecessary, and this color matching is terminated. Note that the total blending ratio D of the basic color materials in the known blended paint is set as the total blending ratio D _RE in the recommended paint (step S411).

  On the other hand, if the magnitude of the color difference ΔE is greater than or equal to a predetermined value (NG), the process proceeds to a subroutine of step S407, and a recommended blending ratio is calculated. Specifically, as shown in FIG. 9, from the data of the starting paint and the known blended paint obtained in steps S403 and S405, first, in step S471, the total blending ratio D of the four basic color materials in the known blended paint. Get the data. For example, in the case of the known blend paint shown in FIG. 10, the value of D = 50/1000 (= (25 + 10 + 10 + 5) /1000=0.050=5.0%) is acquired as the total blend ratio D. To do.

Thereafter, as in the first embodiment described above, in accordance with step S342～S347, give the total blending ratio D _RE recommendation paint, obtaining a further recommendation compounding ratio. The value obtained in step S405 is used for the lightness L * _o of the base material, and the value obtained in step S401 is used for the lightness L * _ST of the sample.
Thus, it was possible to obtain a paint (recommended paint) in which the blend ratio of the known blended paint was corrected based on the sample color data and the color was matched close to this using the starting paint data.

  Thereafter, returning to the main routine, in step S408, a recommended paint prepared in accordance with the obtained recommended blending ratio is prepared, and this is applied to the base material designated in step S402 to manufacture the test paint 51. Specifically, the test paint 51 is prepared by applying the clear paint as in the above-described starting paint 53 and applying the clear paint.

Next, in step S409, the color of the test paint 51 is measured by the spectrophotometer 20, and data such as a * _TR , b * _TR, etc., including the lightness L * _TR of the test paint are obtained.
Next, the process proceeds to step S410, and the colors of the test paint 51 and the sample MH are compared. Specifically, the color difference ΔE between the two is calculated, and if this magnitude is equal to or smaller than a predetermined value (OK), the color matching is terminated because it is not necessary to perform the color matching again.

On the other hand, when the magnitude of the color difference ΔE is equal to or larger than the predetermined value (NG), the process returns to step S407 to calculate the recommended blending ratio again.
At this time, in step S412, by substituting D _RE to D, in obtaining a new recommendation blending ratio, the total compounding ratio of known formulated coating used in step S407 (step S342) to obtain the previous recommendation compounding ratio Instead of D, the total blending ratio D _RE of the recommended paint obtained last time is used. Similarly, when L * _TR is substituted into L * to obtain a new recommended blending ratio, the brightness L * of the starting paint 53 used in step S407 (step S342) to obtain the recommended blending ratio this time is obtained. Instead, the lightness L * _TR of the prototype 51 is used. As a result, as shown by a broken line in FIG. 5, the recommended blending ratio of the new recommended paint is obtained by reflecting the recommended blending ratio of the recommended paint this time and the result of the test paint 51 obtained in steps S407 and S409. Therefore, the test paint 51 and the recommended paint having a sufficiently small color difference from the sample (color sample) can be obtained at an early stage.

  Furthermore, in the third embodiment, when a recommended paint capable of sufficiently reducing the color difference ΔE is obtained, the recommended paint is prepared using the dispenser 30 and the stirring device 40 in accordance with the recommended blend ratio. Then, the recommended paint (stain) is applied to the specified type of base material by the coating apparatus 50, and after scraping and drying, the clear paint is further applied and dried three times to produce the coated product 52. In this manner, the color-matched coated object 52 can be manufactured by the manufacturing apparatus 1500.

Next, a specific example 3 (one example) in which color matching is performed using the color matching apparatus 500 of the third embodiment will be described.
(Specific example 3)
Specific example 3 is shown in FIG. In this example, “Nara” is used for the base material as data of the sample MH, and its Lab is L * _ST = 48.22, a * _ST = 9.95, b * _ST = 23.36. Suppose that In addition, the mixing ratio of the base and each basic color material in the paint painted on the sample is unknown.

  Next, color matching by the color matching apparatus 500 will be described in the third embodiment. In the third embodiment, in the step S403, data of a known blend paint is given. The data is a blending ratio of basic color materials of base and white, black, yellow, and red. Specifically, these are 950.0, 25.0, 10.0, 10.0, 5. 0 (both in parts per thousand).

Therefore, according to the blending ratio of the known blended paint, the recommended paint was prepared using the dispenser 30 and the stirring device 40, applied to the base material of “Nara”, and colorimetrically, L * = 47.47, a * = 10.34, b * = 25.99 was obtained. The color difference ΔE between the sample and the starting coating was ΔE = 1.18, and it was judged that the color difference was slightly larger than the predetermined value ΔE ≦ 1.0. Further, when the lightness L * ₀ of the base material (if it was) was measured, L * ₀ = 61.84, a * ₀ = 8.93, b * ₀ = 28.18 were obtained.

Therefore, when the constant K and the index n were calculated in step S407 (steps S342 to S345) (see equation (3)), K = 46.63 (= (61.48−47.41) / (0.05) ^0.4 ). The index n = 0.4 is maintained. Then, according to step S346, D _RE = 0.043 (= ((61.48−48.22) /46.63) ^{1 / 0.4} ) was obtained from the equation (1).
In the column of the recommended blending ratio in FIG. 10, the blending ratio of the approximate color sample paint and the numerical value of each basic color material are the same, only the base value is increased, and the total blending ratio D _RE = _43/1000 as a whole. Each value when adjusted is shown. In the column of recommended blending ratio, the blending ratio of the base and the basic color material is shown in parts per thousand.
When the color of the prototype paint coated with the recommended paint of the recommended blend ratio according to the specific example 3 obtained by the apparatus and method of Example 3 was measured, L * _RE = 48.06, a * _RE = 10.11, b * _RE was 22.97. The color difference ΔE from the sample color data is ΔE = 0.45, which is a sufficiently approximate color with a color difference ΔE ≦ 1.0. From this, it can be seen that the color matching of the recommended paint was properly performed.

In the above, the computer 10 functions as a sample color data acquisition unit in step S401, functions as a base material type designation unit in step S402, functions as a known paint data acquisition unit in step S403, and starts in step S405. It can be seen that it functions as an acquisition unit and a base material brightness acquisition unit, and functions as a recommended blend ratio calculation unit in step S407. In step 403 and S405, it also functions as an approximate color data acquisition unit.
Further, it can be seen that it functions as a Kn determining means in steps S342 to S345 and functions as a total blending ratio determining means in step S346. Further, it can be seen that it functions as a prototype color data acquisition unit in step S409 and functions as a difference determination unit in step S410. In step S406, it functions as an initial difference determination means.

  Also in the third embodiment, the recommended paint is prepared by stirring the paint components discharged from the dispenser 30 by the stirring device 40 in accordance with the recommended blend ratio of the recommended paint obtained by using the computer 10 as each means. Thereafter, the recommended paint supplied thereto is applied to the base material by the coating apparatus 50. Specifically, as described above, the recommended paint (stain) applied to the base material by the roll coater is applied to the decorative board (projection board) on the surface of the base material, scraped, and then dried. Thereafter, the application and drying of the colorless and transparent UV clear paint is repeated three times to produce the coated product 52. Thus, by providing the color matching apparatus 500 and the coating apparatus 50, the manufacturing apparatus 1500 for the color-matched coated object 52 is obtained.

In the above, the present invention has been described with reference to the first, second, and third embodiments. However, the present invention is not limited to the above-described embodiments, and can be appropriately modified and applied without departing from the gist thereof. Needless to say.
For example, in the color matching apparatus 300 illustrated in FIG. 1, the dispenser 30 and the stirring device 40 are also included in the color matching apparatus 300. However, as indicated by a broken line in FIG. 1, a sheet describing the recommended blend ratio calculated by the computer 10 is ejected from the printer 18 or displayed on the display 10a, or a communication line (not shown) such as the Internet or a LAN is used. It is also possible to provide a color matching device that simply transmits the recommended blend ratio value to a computer at another location. In this case, separately, according to the recommended blending ratio, the operator weighs and mixes the paint for the base and each basic color material to obtain a color-matched non-hiding paint.
In the color matching apparatus 300 shown in FIG. 1, the sample MH is measured using the spectrophotometer 20, and sample color data is input to the computer 10. However, since it is sufficient that the computer 10 can acquire the sample color data, the sample color data may be acquired through a communication line (not shown). Note that the sample color data acquired by the computer 10 may be sample color data created by some method instead of actual measurement data obtained by measuring the sample.

  Moreover, in Example 3, after obtaining data (mixing ratio) of the known blended paint, this was actually blended and applied to the base material to actually produce the starting paint, and the lightness L * of the starting paint However, even when data such as the lightness L * of the starting paint is separately provided, the recommended blending ratio of the recommended paint can be obtained in the same manner.

It is explanatory drawing which shows the outline | summary of the color matching apparatus concerning Examples 1-3. It is a chart explaining the content of the sample paint data stored in the sample paint database in the color matching device. 3 is a flowchart showing the flow of each process of color matching by the color matching apparatus of Embodiments 1 and 2. 6 is a flowchart showing a flow of a subroutine for selecting approximate color samples according to Embodiments 1 and 2. 12 is a flowchart showing a flow of a recommended blend ratio calculation subroutine according to the first and second embodiments. It is a graph which shows the result of the specific example 1 which performed the specific sample color matching using the color matching apparatus concerning Example 1. FIG. It is a graph which shows the result of the specific example 2 which performed the color matching of the specific sample using the color matching apparatus concerning Example 1. FIG. 10 is a flowchart illustrating a flow of each process of color matching performed by the color matching apparatus according to the third exemplary embodiment. 12 is a flowchart showing a flow of a recommended blend ratio calculation subroutine according to the third embodiment. It is a graph which shows the result of the specific example 3 which performed the specific sample color matching using the color matching apparatus concerning Example 3. FIG.

Explanation of symbols

300, 400, 500 Color matching device 1300, 1400, 1500 Painted object manufacturing apparatus 10 Computer 11 Sample paint object database 15 Keyboard 16 Mouse 18 Printer 20 Spectrophotometer 30 Dispenser 40 Stirrer 50 Coating apparatus 51 Test paint object 52 Paint object 53 Departure paint MH sample (color sample)

Claims (14)

A method for color matching of a uniform non-hiding paint that comprises a transparent film component and one or more basic color materials and is applied to a base material,
With respect to the color sample, a sample color data acquisition step for acquiring sample color data including lightness L * _ST ;
A base material lightness acquisition step for acquiring the lightness L * ₀ of the base material;
Approximate color paint product data of an approximate color paint product having a color approximate to the color represented by the sample color data, and each of the transparent film components of the non-opaque approximate color paint applied to the approximate color paint product and each Approximate color data acquisition step for acquiring approximate color paint data including the mixing ratio of basic color materials;
Using the lightness L * ₀ and L * _ST , the lightness L * of the approximate color paint obtained from the approximate color paint data, and the total blending ratio D of each basic color material in the approximate color paint, the approximation The color paint is a recommended blend ratio calculating step for obtaining a recommended blend ratio of the recommended paint with respect to the non-hiding paint , wherein the blend ratios of the respective basic color materials are the same and the total blend ratio D _RE of the respective basic color materials is different . , A method for color matching of non-hiding paints. A method for color matching of a uniform non-hiding paint that comprises a transparent film component and one or more basic color materials and is applied to a base material,
A sample color data acquisition step for acquiring sample color data including lightness L * _ST with respect to the color sample;
A base material lightness acquisition step of acquiring the lightness L * ₀ of the base material;
Sample paint data relating to a sample paint obtained by applying a non-hiding sample paint to the base material in advance, the transparent film component and the mixing ratio data of each basic color material in the applied sample paint, and the color data of this sample paint A sample selection step of selecting approximate color sample paint data of an approximate color sample paint having a color similar to the color represented by the sample color data from a plurality of sample paint data having
Using the lightness L * ₀ and L * _ST , the lightness L * of the approximate color sample paint obtained from the approximate color sample paint data, and the total blending ratio D of each basic color material in the approximate color sample paint, The approximate color sample paint is a recommended blend ratio for obtaining a recommended blend ratio of the recommended paint with respect to the non-hiding paint , wherein the blend ratios of the respective basic color materials are the same, and the total blend ratio D _RE of the respective basic color materials is different . A color matching method for a non-hiding paint including a calculation step. A method for color matching of a uniform non-hiding paint that comprises a transparent film component and one or more basic color materials and is applied to a base material,
A sample color data acquisition step for acquiring sample color data including lightness L * _ST with respect to the color sample;
The blending ratio data of the transparent film component and each basic color material is known, and it is a non-hiding known blended paint, and the starting coating material obtained by applying this known blended paint to the base material exhibits a color similar to the color sample. For a known blend paint, a known paint data acquisition step for acquiring the blend ratio data,
With respect to a starting coating material in which the above-mentioned known coating composition is applied to the base material, starting coating data for obtaining starting coating material data including color data including the lightness L * of the starting coating material or color data capable of calculating the lightness L * is obtained. Object data acquisition step;
A base material lightness acquisition step of acquiring the lightness L * ₀ of the base material;
Using the lightness L * ₀ and L * _ST , the lightness L * of the starting paint, and the total blending ratio D of the basic color materials in the known blended paint, the known blended paint is defined as And a recommended blending ratio calculating step for obtaining a recommended blending ratio of the recommended paint with respect to the non-opaque paint, wherein the total blending ratio D _RE of each basic color material is different , and color matching of the non-opaque paint Method. A color matching method for a non-hiding paint according to any one of claims 1 to 3,
The recommended blending ratio calculating step for obtaining the recommended blending ratio includes:
A constant index determining step of determining a constant K and an index n using the lightness L *, L * ₀ and the total blending ratio D;
Using said lightness L * _ST, and the constants K and indices n, including, a total compounding ratio determination step of determining in accordance with a total compounding ratio D _RE the formula recommendation paint (1)
^{_{D RE = n √ ((L}} * 0 -L * ST) / K) ... formula (1)
Color matching method for non-hiding paint. A first color matching step of obtaining the recommended blending ratio of the transparent coating component and each basic color material by the color matching method of the non-hiding paint according to any one of claims 1 to 4,
Prototype preparation step of preparing the recommended paint according to the recommended combination ratio;
A test coating step of applying the recommended paint to the base material to produce a test coating;
Prototype color data acquisition step for acquiring color data including the lightness L * _TR of the test paint,
A difference determination step of comparing the sample color data with the color data of the test paint, and determining whether or not a color difference is within a predetermined range,
In the difference judging step,
If it is determined that the color difference is not within the predetermined range, the process returns to the recommended blending ratio calculating step,
In place of the lightness L *, the lightness L * _TR is used.
Instead of the total blending ratio D of each basic color material in the approximate color paint, the approximate color sample paint, or the known blend paint, the total blend ratio D _RE of each basic color material in the recommended paint is used.
Instead of the approximate color paint data, the approximate color sample paint data, or the starting paint data and the blend ratio of the known blend paint, the color data of the test paint and the recommended blend ratio of the recommended paint Using,
Again, calculate the recommended blend ratio of the recommended paint,
A color matching method for a non-hiding paint, which ends color matching when it is determined that the color difference is within a predetermined range. 6. The recommended composition of the transparent coating component and each basic colorant applied to the recommended paint determined to have the color difference within a predetermined range by using the color matching method of the non-opaque paint according to claim 5 A color matching execution step to obtain a ratio;
And a coating step of applying a non-hiding recommended paint prepared according to the recommended blend ratio to the base material. A color matching device for a uniform non-hiding paint to be applied to a base material comprising a transparent film component and one or more basic color materials,
Sample color data acquisition means for acquiring sample color data including lightness L * _ST for the color sample;
A base material lightness acquisition means for acquiring the lightness L * ₀ of the base material;
Approximate color paint product data of an approximate color paint product having a color approximate to the color represented by the sample color data. The transparent film component of the approximate color paint applied to the approximate color paint product and each basic color material Approximate color data acquisition means for acquiring approximate color paint data including the blending ratio;
Using the lightness L * ₀ and L * _ST , the lightness L * of the approximate color paint obtained from the approximate color paint data, and the total blending ratio D of each basic color material in the approximate color paint, the approximate color A recommended blend ratio calculating means for obtaining a recommended blend ratio of the recommended paint with respect to the non-hiding paint, wherein the blend ratio of the basic color materials is the same and the total blend ratio D _RE of each basic color material is different from the paint . A non-hiding paint color matching apparatus. A uniform non-hiding paint color matching device comprising a transparent coating component and one or more basic color materials,
Sample paint data relating to a sample paint obtained by applying a non-hiding sample paint to the base material in advance, including the transparent film component and the blending ratio data of each basic color material in the applied sample paint, and the lightness L of this sample paint A sample paint database storing sample paint data including color data including * or color data capable of calculating the lightness L *;
Sample color data acquisition means for acquiring sample color data including lightness L * _ST for the color sample;
A base material lightness acquisition means for acquiring the lightness L * ₀ of the base material;
Sample selecting means for selecting, from the sample paint data in the sample paint data database, approximate color sample paint data of an approximate color sample paint having a color closest to the color represented by the sample color data;
Using the lightness L * ₀ and L * _ST , the lightness L * of the approximate color sample paint obtained from the approximate color sample paint data, and the total blending ratio D of each basic color material in the approximate color sample paint, The approximate color sample paint is the recommended blend ratio for obtaining the recommended blend ratio of the recommended paint with respect to the non-hiding paint , wherein the blend ratios of the respective basic color materials are the same, and the total blend ratio D _RE of the respective basic color materials is different . A color matching device for a non-hiding paint having a calculation means. A color matching device for a non-hiding paint according to claim 8,
The sample paint data stored in the sample paint database includes type data indicating the type of the base material,
Having a base material type specifying means for specifying the type of the base material,
The sample selection means includes
From the sample paint database, select the approximate color sample paint data of the approximate color sample paint that contains the specified base material type data and has the color closest to the color represented by the sample color data. A non-hiding paint color matching device comprising the above. A uniform non-hiding paint color matching device comprising a transparent film component and one or more basic color materials,
Sample color data acquisition means for acquiring sample color data including lightness L * _ST for the color sample;
The blending ratio data of the transparent film component and each basic color material is known, and it is a non-hiding known blended paint, and the starting coating material obtained by applying this known blended paint to the base material exhibits a color similar to the color sample. For known blended paint, known paint data acquisition means for acquiring the blend ratio data,
With respect to a starting coating material in which the above-mentioned known coating composition is applied to the base material, starting coating data for obtaining starting coating material data including color data including the lightness L * of the starting coating material or color data capable of calculating the lightness L * is obtained. Object data acquisition means;
A base material lightness acquisition means for acquiring the lightness L * ₀ of the base material;
Using the lightness L * ₀ and L * _ST , the lightness L * of the starting coating material, and the total blending ratio D of the basic color materials in the known blend paint, the known blend paint is the difference between the basic color materials. A non-obscuring paint color matching device comprising: a recommended blending ratio calculating unit that obtains a recommended blending ratio of the recommended paint with respect to the non-opaque paint, in which the blending ratio is the same and the total blending ratio of each basic color material is different. A color matching device for a non-hiding paint according to any one of claims 7 to 10,
The recommended blending ratio calculating means is:
Kn determining means for determining a constant K and an index n using the lightness L *, L * ₀ and the total blending ratio D;
The lightness L * _ST, and with the constant K and the indices n, including, a total compounding ratio determining means for determining in accordance with a total compounding ratio D _RE the formula recommendation paint (1)
^{_{D RE = n √ ((L}} * 0 -L * ST) / K) ... formula (1)
Non-hiding paint color matching device. A color matching device for a non-hiding paint according to any one of claims 7 to 11,
Prototype color data acquisition means for acquiring color data including the lightness L * _TR of the test paint, with respect to the test paint prepared by applying the recommended paint prepared according to the recommended blend ratio to the base material; and
Comparing the sample color data with the color data of the test paint, and comprising a difference judging means for judging whether or not a difference regarding the color is within a predetermined range,
In the difference judging means,
If it is determined that the color difference is not within the specified range,
In place of the lightness L *, the lightness L * _TR is used.
Instead of the total blending ratio D of each basic color material in the approximate color paint, the approximate color sample paint, or the known blend paint, the total blend ratio D _RE of each basic color material in the recommended paint is used.
Instead of the approximate color paint data, the approximate color sample paint data, or the starting paint data and the blend ratio of the known blend paint, the color data of the test paint and the recommended blend ratio of the recommended paint Using,
The recommended blending ratio calculating means calculates the recommended blending ratio of the recommended paint again,
A non-hiding paint color matching device configured to end color matching when it is determined that a color difference is within a predetermined range. A color matching device for a non-hiding paint according to claim 12,
An apparatus for manufacturing a coated article, comprising: a coating means for applying a non-hiding recommended paint in which the transparent film component and each basic color material are blended according to the recommended blend ratio to the base material. The program for functioning a computer as each means of the color matching apparatus of the non-occlusion paint of any one of Claims 7-12.

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