JPH0750027B2 - How to create basic data for computer color matching - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of creating basic data which serves as a reference for formulation prescription calculation in computer color matching.

(Prior Art) Computer Color Matching (hereinafter referred to as CCM)
The method is to dye the target fiber tissue with individual dyes at several levels of density, and use optical density calculated from the spectral reflectance of the sample as basic data, and add this basic data with any combination of dyes. This is a method of matching the optical density of the target color. This method is convenient because even an unskilled person can easily perform color matching in a short time.

The basic data required for this CCM must be created for each tissue because different dyes have different dyeing rates to different tissues (for example, plain weave and twill weave). In other words, the basic data sample, which is the number of all dyes used for daily dyeing work, the number of concentrations of several levels (usually 3 to 5 levels), and the number of tissues to be dyed with that dye, is used as CCM preparation work. Will be needed.

(Problems to be solved by the invention) However, in today's demand for high-mix low-volume production,
In many cases, many types of tissues are stained with the same color, and a basic data sample must be created every time there is a request for coloration of a tissue that has never been stained at a staining site other than the reference tissue (hereinafter referred to as a new tissue). There was a problem that it took a lot of time and effort just to prepare the CCM.

The present invention has been made in view of the above problems,
It is an object of the present invention to provide a method of creating basic data for computer color matching, which can easily and efficiently create basic data even for a new organization.

(Means for Solving Problems) The above-mentioned purpose is to prepare basic data as a reference for computer color matching, and to prepare a plurality of density-specific samples for each individual dye as a reference tissue. Then, measure the optical data to make the basic data,
For tissues other than the reference tissues, a dyeing ratio coefficient that represents the relationship between the dyeing ratio of the dye to the reference tissues and the dyeing ratio to the tissues other than the reference tissues was experimentally obtained in advance, and this dyeing ratio coefficient This is achieved by a method for creating basic data for computer color matching, which is characterized by calculating optical data of a tissue other than the reference tissue by multiplying the optical data to obtain basic data.

The present invention will be described in more detail.

The basic data for computer color matching of the new organization can be created as follows. Here, the case where three kinds of A dye, B dye, and C dye are used to obtain optical data of a sample for each density step of 5 steps, for example, optical density will be described with reference to FIG.

(1) First, regarding the reference structure (X), A dye, B
Dye and C dye alone are dyed in 5 steps (density 1 to 5) (step), and the color of the obtained sample is measured (step). (Optical density when dyed with a standard tissue (X) with A dye alone at a density of 1, the same applies below), (2) Next, the new structure (Y) and the reference structure (X) are the A dye,
Dyes B and C alone are dyed in the same bath for only one step (for example, density 3) (step), the color of the obtained sample is measured (step), and the optical density is determined from the spectral reflectance (step). The relationship between the optical densities is represented by the dyeing rate coefficient H (step).

Therefore, the dyeing rate coefficient _HA of the new structure (Y) with respect to the reference structure (X) of the dye _A can be expressed as follows.

Further, the dyeing rate coefficient H _B of the new structure (Y) with respect to the reference structure (X) of B dye can be expressed as follows.

The dyeing coefficient H _C of the new structure (Y) with respect to the reference structure (X) of C dye can be expressed as follows.

(3) Optical density of new dye (Y) A, B, and C dyes alone with a density of 1,2,4,5 (Calculated optical density when dyed with A dye alone at a density of 1 in the reference tissue (Y), the same applies hereinafter), Can be calculated as follows using the above dyeing rate coefficient (step).

A dye only B dye only C dye only Computer color matching is carried out using these data as basic data, and the optical density of the target color is made to match by adding any combination of dyes.

(Function) The present invention does not prepare a plurality of concentration-level samples for each individual dye alone for tissues other than the reference tissue, and, for example, for the reference tissue and the tissues other than the reference tissue, one sample is prepared for each individual dye. The sample was dyed in the same bath at the same concentration, and the dyeing rate coefficient for the reference tissue other than the reference tissue was obtained from the optical densities of both dyed samples, and the optical data for other concentrations not sampled by this dyeing rate coefficient Is calculated, it is not necessary to sample a large number of samples for organizations other than the reference organization, and basic data can be easily created.

(Examples) Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 shows an apparatus for implementing the computer color matching method of the present invention. (1) is a spectrophotometer for measuring the spectral reflectance and spectral transmittance of an object, and is an apparatus capable of measuring at least a visible light region of wavelength 400 nm to 700 nm. (2) is a storage device such as a ROM, a RAM, and a magnetic disk. The optical densities of a plurality of samples of each density step for each individual dye of the reference tissue and the optical density calculated using the dyeing coefficient of the new tissue. Is remembered. (3) is a computing device such as a microcomputer, for obtaining the optical density using the data of the color sample measured by the spectrophotometer (1), for calculating the dyeing rate coefficient, and for new structures It is the work of calculating the optical density from the reference tissue using the dyeing rate coefficient. (4) is a display device such as a display or a printer, which displays the required optical density of the new tissue.

Next, the present invention will be specifically described with reference to specific examples.

(1) First, a panty hose (nylon) using the following yarn was used as the reference structure (X) and dyed under the following conditions to obtain a sample.

(I) Material to be dyed Pantyhose leg part 15d / 5f Kennel yarn of the standard tissue Panty / toe part 30d / 8f Woolly yarn (ii) Dye and concentration Nylosan Yellow N-3RL (Sand Co., Ltd.) 0.01,0.
05,0.1% owf Nylosan Blue E-GL (Sand Co., Ltd.) 0.005,0.0
1,0.05,0.1% owf Nylosan Red E-BNL (Sand Co., Ltd.) 0.01,0.03,
0.05,0.1% owf (iii) Dyeing method: exhaust dyeing method (bath ratio 1:30) The legs of the obtained sample are color-measured and the optical density is determined from the spectral reflectance. (With reference structure (X), Yellow N-3RL alone has a concentration of 0.01% owf
Optical density when stained with I asked. The results are shown in Tables 1 to 3.

(2) Next, as the new structure (Y), the following type of support type panty hose (nylon) is used,
A sample was obtained by dyeing under the following conditions in the same bath as the pantyhose having the above-mentioned standard structure.

(I) Material to be dyed (A) Same as standard tissue (1) (B) New tissue pantyhose (support type) Leg (20 × 13 × 13DCY) × 13d / 3f raw silk panty (20 × 30PCY) × 30d / 8f Woolly thread Toe 13d / 3f raw thread × 30d / 8f Woolly thread × 70d / 18f Woolly thread (ii) Dye and concentration Yellow N-3RL 0.01% owf Blue E-GL 0.05% owf Red E-BNL 0.01% owf (iii) Similar to staining method (1), the leg part of the obtained sample was color-measured and the optical density of the new tissue was determined from the spectral reflectance. The results obtained are shown in Tables 4 to 6.

The optical density of the reference tissue Was the same as in Tables 1 to 3.

Thus Yellow N-3RL reference tissue new tissue to (X) (Y) color yield coefficient H _Y optical density is the greatest wavelength and before and after the wavelength i.e. 420nm of, 440 nm, the average of color yield coefficient 460nm I asked.

Ie The average H _Y of the above 3 points is In addition, the dyeing coefficient H _B of the new structure (Y) with respect to the reference structure (X) of Blue E-GL is the average of the wavelengths with the largest optical density and the wavelengths before and after that, that is, 620 nm, 640 nm, 660 nm. I asked for.

Ie The average H _B of the above 3 points is Further, Red E-BNL reference tissue new tissue to (X) (Y) color yield coefficient H _R the optical density and largest wavelength before and after the wavelength i.e. 520nm of, 540 nm, the average color yield coefficient 560nm I asked for.

Ie The average _{H R} of three or more (3) The following dye concentrations of the new structure (Y) Yellow N-3RL 0.05,0.1% owf Blue E-GL 0.005,0.01,0.1% owf Red E-BNL 0.03,0.05,0.1% Optical density of owf Was calculated as follows using the above dyeing rate coefficient.

(4) For comparison, the new tissue (Y) was dyed under the following conditions to obtain a sample.

(I) New tissue to be dyed (ii) Dye concentration Yellow N-3RL 0.05,0.1% owf Blue E-GL 0.005,0.01,0.1% owf Red E-BNL 0.03,0.05,0.1% owf (iii) Staining conditions Similar to (1), the leg part of the obtained sample was subjected to color measurement, and the optical density was determined from the spectral reflectance. I asked.

Calculated value obtained in (3) And the measured values obtained in (4) The results of the comparison are shown in Tables 7 to 9 and FIGS. 3 to 5.

As is clear from Tables 7 to 9 and FIGS. 3 to 5, it can be seen that the two are almost the same.

In the embodiment, the dyeing rate coefficient H is obtained by averaging the dyeing rate coefficients of the wavelength having the largest optical density and the wavelengths before and after it, but the present invention is not limited to this and the dyeing rate coefficient H is determined according to the characteristics of the material and the dye. A convenient method using an average of the dyeing rate coefficients of can be used.

Next, in order to confirm the accuracy of the present invention, computer color matching was performed using the basic data obtained by the present invention. The results are shown in Fig. 10.

As is clear from Table 10, the computer color based on the basic data obtained by the present invention on both the color difference and the visual judgment.
It can be seen that matching has sufficient toning accuracy.

(Effects of the Invention) As described above in detail, according to the computer color matching basic data creation method of the present invention, the procedure of the preparatory work required for computer color matching can be quickly performed, and the production can be performed. The effect is extremely remarkable, such as the further improvement of the property.

[Brief description of drawings]

1 is a block diagram showing an apparatus for carrying out the method of the present invention, FIG. 2 is a flow chart for explaining the method of the present invention,
FIGS. 3 to 5 are accuracy comparison diagrams of the optical densities obtained from the actually dyed sample and those obtained by calculation according to the procedure of the present invention in order to show the effect of the present invention.

Claims (1)

[Claims] 1. When preparing basic data as a standard for computer color matching, a plurality of samples for each concentration of each individual dye is prepared for a standard tissue, and the optical data is measured to prepare the basic data. As data, for tissues other than the reference tissues, a dyeing ratio coefficient representing the relationship between the dyeing ratio of the dye to the reference tissues and the dyeing ratio to the tissues other than the reference tissues was experimentally obtained in advance, and this dyeing ratio coefficient was calculated. A method for creating basic data for computer color matching, characterized by calculating the optical data of a tissue other than the reference tissue as the basic data by multiplying the optical data of the reference tissue.