JP4042453B2 - Method for producing inkjet recording medium for printing proofreading - Google Patents

Description

【００６２】
表１からわかるように、実施例１及び参考例１〜３ではいずれもインク吸収性に問題はなく、オフセット印刷の色域と比較して色再現範囲にも問題はなく、印刷用紙の風合いを有しかつインクジェット記録媒体表面のうねりやギラツキによる画質低下のない印刷校正用に適したインクジェット記録媒体を得ることができた。転写法を用いていない比較例１、２では何れもインクジェット記録媒体表面の凹凸に起因するうねりやギラツキが大きく、それによる画質の低下が目立ち、校正用インクジェット記録媒体としては使用できないものであった。比較例３に関しては、インク吸収性自体は良好で、得られる画像も非常に綺麗であるが、その風合いは明らかに銀塩写真調でありとても印刷調として使用することはできないものだった。比較例４に関しては、印刷用紙の風合いを有しうねりやギラツキはないものの、インク吸収性に問題があり、結果として、色再現範囲が不十分となることより、校正用インクジェット記録媒体としては使用できないものであった。
【００６３】
【発明の効果】
本発明の印刷校正用インクジェット記録媒体は、インク受容層が十分なインク吸収性を有し、その結果オフセット印刷やグラビア印刷の色再現範囲を十分カバーすることができ、しかも印刷用紙の風合いや印刷物と同等の質感を兼ね備えている点で非常に優れた印刷校正用インクジェット記録媒体である。
【図面の簡単な説明】
【図１】本発明のインクジェット記録媒体の一実施例を示す断面図である。
【符号の説明】
１…基材
２…下地層
３…表面層
４…インク受容層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink jet recording medium for printing proofreading and a manufacturing method thereof.
[0002]
[Prior art]
In the ink jet recording method, fine droplets are ejected from the head of an ink jet printer to form an image on a paper or film substrate.
In recent years, in addition to the simplicity of the image forming mechanism, the size of the ejected droplets and the resolution of the dots have been increased, and the clarity and speed of the recorded images and characters, low noise, and dot density have been high. In addition, since the recorded color reproduction range is widened, it is rapidly spreading to various applications.
In general households, an inkjet printer is used to record a postcard such as a New Year's card or an image, or an image recorded by a digital camera is output by an inkjet printer.
In addition, commercial signs in the city are output from inkjet printers, and their uses are expanding not only for personal use but also for business use.
[0003]
However, while the performance of these recording media has been improved and has been widely used in various applications, an ink jet recording medium that is sufficiently satisfactory as a printing proofreading application has not yet been obtained.
The reason for this is that in order to use an inkjet recording medium for print calibration, not only the performance as an inkjet recording medium, such as ink absorbency, but also the desired hue, brightness, texture, gloss, etc. of the printing paper should be considered. This is because the image of the ink jet recording section must have the same texture as the printed matter.
[0004]
In order to use an inkjet recording medium as a printing proofreading application, it is essential to cover the color reproduction range obtained by offset printing or gravure printing. To achieve this, usually high color development is obtained. It is conceivable to design an ink receiving layer material or to eject an amount of ink that can cover a desired color reproduction range from an ink jet printer.
In general, in order to cover the color reproduction range of offset printing and gravure printing, it is necessary to eject a considerably larger amount of ink than the amount of ink used for normal printing in a general home or office.
Therefore, the ink jet recording medium is primarily required to absorb an amount of ink that can cover the color reproduction range of printing. However, glossy paper used for output bodies such as the above-described digital cameras may have sufficient ink. There is nothing that has an absorptivity, and there is nothing that satisfies only a part of the mat type.
[0005]
On the other hand, if ink is ejected from an inkjet printer in an amount sufficient to cover the desired color reproduction range for an inkjet recording medium that does not have sufficient ink absorbency, such as conventional glossy paper, bleeding and poor drying may occur. Not only does this cause problems, but overlapping of two or more color droplets causes color unevenness called beading, which cannot be used for printing proofing.
[0006]
Here, even if the amount of ink that can cover the color reproduction range of printing can be absorbed, what is obtained by inkjet recording on glossy paper is very beautiful in appearance, but it is better than offset printing or gravure printing. It is not a printed tone image but a silver salt photographic tone image, and the surface of the glossy paper itself is very high glossy. Is possible.
[0007]
On the other hand, with respect to mat paper that can absorb an amount of ink that can cover the color reproduction range of printing, there is no problem with ink absorption itself, but the image obtained by ink jet recording has white spots and uneven color that are peculiar to the mat paper type. In addition, the density lowers due to the penetration of the dye in the ink, and cannot be used for printing proofing.
[0008]
In addition, at present, there is no ink-jet recording medium that is commercially available for printing proofreading, and has no ink absorptivity enough to sufficiently cover the color reproduction range of printing. In general, multiple layers are laminated on the substrate, such as an ink receiving layer for absorbing the solvent in the ink and an ink receiving layer for selectively capturing the dye in the ink. It is.
For this reason, the surface roughness increases as each layer is laminated on the substrate, and the surface of the ink jet recording medium is considerably roughened.
The roughness of the ink jet recording medium surface appears as waviness or glare, and affects the texture of the recording medium. In other words, due to the large irregularities on the surface of the ink jet recording medium, not only the texture of the recording medium and the printing paper is different, but also the image quality obtained by ink jet recording looks very inferior due to this swell and glare. The texture of the printed material is greatly different, and it cannot be used for printing proofing.
[0009]
[Problems to be solved by the invention]
The present invention improves the ink receiving layer formed on the outermost surface of the ink jet recording medium and the base layer provided on the surface of the base material, so that there is no waviness or glare caused by the rough surface of the recording medium, and there is no bleeding. An object of the present invention is to provide an ink-jet recording medium for printing calibration that has ink absorbability and can provide a texture similar to that of a printing paper or a printed material, and a method for manufacturing the same.
[0014]
[Means to solve the problem]
The invention according to claim 1 is a surface layer comprising a wet silica filler and a binder as main components on a substrate, and a surface layer comprising dry silica and a water-soluble resin as main components on the transfer substrate. The transfer material provided with the surface layer side is overlaid on the base layer, and after drying, the transfer substrate is peeled off ,
Printing wherein the relationship between the secondary particle size (A) of the wet silica used for the underlayer and the secondary particle size (B) of the dry silica used for the surface layer satisfies 5 ≦ A / B ≦ 30 This is a method of manufacturing a calibration inkjet recording medium.
[0016]
The invention according to claim 2 is the method for producing an ink jet recording medium for printing calibration according to claim 1, wherein the surface layer is transferred onto a substrate before drying.
[0017]
The invention of claim 3 is a method of manufacturing a printed calibration inkjet recording medium according to claim 1 or 2 wherein the base layer and the surface layer is characterized in that adjacent.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, an ink jet recording medium for printing proofing of the present invention comprises a base layer 2 having a filler (for example, wet silica) and a binder as main components, dry silica and a water-soluble resin on a substrate 1. It has a configuration in which two or more ink receiving layers 4 having at least a surface layer 3 having a main component are provided.
[0021]
Here, the relationship between the secondary particle size (A) of the wet silica used for the underlayer and the secondary particle size (B) of the dry silica used for the surface layer is in the range of 5 ≦ A / B ≦ 30. Is preferred.
[0022]
In the production of an inkjet recording medium for printing calibration, first, a base layer mainly composed of a filler (for example, wet silica) and a binder is provided on a base material, and dry silica and water-soluble are provided on the base material for transfer. There is a method in which a transfer material provided with a surface layer mainly composed of an adhesive resin is superposed on the surface layer on the base layer, dried, and then the transfer substrate is peeled off.
[0023]
In addition to the above method, an ink having a base material mainly composed of dry silica and a water-soluble resin, and a base layer mainly composed of a filler (for example, wet silica) and a binder, on a base material for transfer. There is a method obtained by superimposing the base layer on a transfer material provided with a receiving layer and peeling the transfer substrate after drying.
[0024]
And when transferring the said transfer material, it is preferable to transfer a base layer or / and a surface layer on a base material before drying.
[0025]
For the transfer substrate, plastic films such as polyethylene, polypropylene, polyester, cellophane, polyurethane, and polyvinyl chloride, paper such as impregnated paper and vapor-deposited paper, metal sheets, and the like can be used. It is preferable to use plastic films in a series of processes such as bonding and peeling, and it is more preferable to use a polyester film in consideration of heat resistance.
[0026]
Moreover, the ink receiving layer previously formed on the base material and the ink receiving layer applied on the transfer base material are mainly composed of a resin serving as a filler and a binder, respectively.
[0027]
Dry silica, which is an essential component in the surface layer of the ink receiving layer, can be obtained by a combustion method or a heating method.
By using dry silica of inorganic fine particles in the surface layer of the ink jet recording medium, a sufficient gap is formed inside the ink receiving layer, so that high ink absorbability can be imparted. When colloidal silica is used as the same inorganic fine particle, the ink absorbability is inferior because sufficient voids are not formed as much as dry silica.
Further, by using a water-soluble resin having a refractive index close to that of dry silica of inorganic fine particles, the ink receiving layer can be made transparent.
[0028]
Examples of water-soluble resins used with dry silica include polyvinyl alcohol, polyvinyl alcohol derivatives such as cation-modified polyvinyl alcohol and silanol-modified polyvinyl alcohol, cellulose derivatives such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose, polyvinyl pyrrolidone, starch, and oxidized starch. , Starch derivatives such as etherified starch and esterified starch, resins with ether bonds such as polypropylene oxide, polyethylene glycol, polyvinyl ether, polyacrylamide, polyallylamine, polyethyleneimine, gelatin, casein, soy protein, maleic acid resin, etc. It can be mentioned, but is not limited to these. Further, two or more of these water-soluble resins may be used in combination depending on the purpose.
[0029]
Although there is no particular limitation on the base material used for the ink-receiving layer formed in advance, when manufacturing using the transfer method, the solvent of the coating liquid is dried through the base material used for the ink-receiving layer formed in advance during drying. Therefore, it is preferable to use paper having air permeability, more preferably, paper having an air permeability of 500 seconds or less.
[0030]
The filler used for the ink receiving layer formed in advance can be selected from known ones. For example, wet or dry synthetic amorphous silica, light or heavy calcium carbonate, zeolite, kaolin, talc, clay, mica, hydrotilesite and other viscous minerals, colloidal silica, alumina, colloidal alumina, aluminum silicate, silica Inorganic pigments such as magnesium oxide, calcium silicate, magnesium carbonate, zinc oxide, zinc carbonate, magnesium oxide, titanium dioxide, barium sulfate, calcium sulfate, magnesium hydroxide, aluminum hydroxide, styrene or acrylic plastic pigment, polystyrene, Although organic pigments, such as a urea resin and a melamine resin, can be mentioned, it is not restricted to these. Further, two or more of these fillers may be used in combination depending on the purpose.
[0031]
It is more preferable to use wet silica as a filler used for the ink receiving layer formed in advance because the ink absorption performance of the ink receiving layer is further improved. The wet silica may be either synthesized by a precipitation method or synthesized by a gel method, but more preferably, a precipitated silica having a higher ink absorbability is obtained by taking a porous aggregate structure. It is preferable to use it.
[0032]
The binder used together with the filler used for the ink receiving layer formed in advance can also be selected from known ones. For example, polyvinyl alcohol, or polyvinyl alcohol derivatives such as cation-modified polyvinyl alcohol and silanol-modified polyvinyl alcohol, cellulose derivatives such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl pyrrolidone, starch or oxidized starch, etherified starch, esterified starch Conjugates such as starch derivatives such as polypropylene oxide, polyethylene glycol, polyvinyl ether, resins having an ether bond, polyacrylamide, polyallylamine, polyethyleneimine, gelatin, casein, soy protein, maleic acid resin, styrene-butadiene copolymer, etc. Diene copolymer latex, acrylic copolymer latex, vinyl copolymer Coalescing latex, alkyd resin latex, a polyurethane resin, a polyester resin, and polyvinyl butyral, but not limited thereto. Further, two or more of these resins may be used in combination depending on the purpose.
[0033]
The weight ratio of filler to resin applied on each substrate is preferably in the range of 9: 1 to 4: 6, more preferably 8.5: 1.5 to 6: 4. When the weight ratio of the filler is higher than this range, the binding force of the resin is insufficient at the time of film formation, and cracking may occur at the time of drying or the film may become brittle. Further, when the weight ratio of the resin is increased, the absorption speed of the ink ejected from the ink jet printer may be decreased, and problems such as bleeding and poor drying may occur.
[0034]
The dry coating amount of each ink-receiving layer is preferably ² to 35 g / m ^2, but not only the cost increases as the dry coating amount increases, but also the smoothness is impaired or the film becomes brittle. There is a case. Therefore, the ink amount required to cover the color reproduction range of offset printing and gravure printing is sufficiently absorbed, and the ink jet is caused by waviness and glare caused by the unevenness of the ink receiving layer formed in advance on the substrate. It is desirable that the dry coating amount of the ink receiving layer is minimized as long as the image quality of the recording portion is not deteriorated.
[0035]
In the ink receiving layer of the present invention, a dye fixing agent, a pigment dispersant, an antifoaming agent, a leveling agent, a thickening agent, a fluidity improving agent, a sizing agent, an ultraviolet absorber, an antioxidant, an antifungal agent are optionally added. Additives such as an agent, a water resistant agent, a pH adjuster, and a fluorescent brightening agent may be arbitrarily selected and contained within a range not impeding the purpose of the present invention. In addition, a coloring dye or pigment can be added for the purpose of matching the color tone of the desired printing paper.
[0036]
In the case where an ink receiving layer formed in advance on a substrate is composed mainly of wet silica and a binder, and an ink receiving layer mainly composed of dry silica and a water-soluble resin is formed on the ink receiving layer, wet silica and Considering the secondary particle size of each dry silica is more effective for imparting ink absorbency and other performance to the ink jet recording medium and giving the texture of the printing paper and the same texture as the printed matter. .
[0037]
Specifically, when the secondary particle diameters of wet silica and dry silica are A and B, respectively, it is preferable that the range is 5 ≦ A / B ≦ 30. For example, when dry silica having a secondary particle size of 200 nm is used, wet silica having a secondary particle size in the range of 1 μm to 6 μm is selected. When A / B is less than 5, since the pore volume of the entire ink receiving layer is relatively small, there is a case where the ink receiving layer absorbs ink slightly although it is not at a practically problematic level. In addition, when A / B exceeds 30, it is not at a practically problematic level, but the unevenness of the ink receiving layer formed in advance on the substrate due to the increase in the secondary particle size of the wet-colored silica. However, although the appearance of the ink jet recording medium is hardly recognizable, a slight swell or glare may be confirmed by staring at the surface of the recording medium or viewing from an oblique angle. In addition, since the secondary particle size difference between wet silica and dry silica is large, when the ink receiving layers are overlapped, the dry silica fills the voids in the ink receiving layer where the wet silica is present, which is also practical. Although it is not a level causing a problem, there may be a slight bleeding when absorbing ink.
[0038]
In addition, by setting 5 ≦ A / B ≦ 30, the unevenness of the ink receiving layer previously formed on the substrate is reduced. Therefore, when the transfer method is used in the manufacturing process, the ink formed in advance is formed. This is preferable because it is more uniformly transferred to the receiving layer.
[0039]
There are no particular limitations on the method of applying the ink receiving layer previously formed on the substrate or the ink receiving layer applied on the transfer substrate, and a conventionally known coating method can be selected as appropriate. As a coating method, a roll coater, a blade coater, a rod blade coater, an air knife coater, a gate roll coater, a size press coater, a curtain coater, a bar coater, a lip coater, a gravure coater, a die coater, or the like can be used.
[0040]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples. In the examples, “part” means “% by weight”. The composition of the ink-receiving layer-forming coating liquid that is preliminarily formed on the base material is the following composition 1 to composition 4, and the ink-receiving layer-forming coating liquid that is applied onto the transfer base material is: Composition 5.
[0041]
“Composition 1”
Hydrotalcite KW900A (manufactured by Kyowa Chemical Industry Co., Ltd .: particle size 3.95 μm) 10.8 parts polyvinyl alcohol PVA-217 (manufactured by Kuraray Co., Ltd.) 4.6 parts water 84.6 parts
“Composition 2”
Gel process wet silica SYLYSIA380 (Fuji Silysia Co., Ltd .: secondary particle size 8.0 μm) 11.9 parts Polyvinyl alcohol PVA-117 (Kuraray Co., Ltd.) 5.1 parts Water 83 parts
“Composition 3”
Precipitation method wet silica P-526U (manufactured by Mizusawa Chemical Industry Co., Ltd .: secondary particle size 0.69 μm) 11.9 parts polyvinyl alcohol PVA-117 (manufactured by Kuraray Co., Ltd.) 5.1 parts water 83 parts
“Composition 4”
Precipitation method wet silica X-40 (manufactured by Tokuyama Co., Ltd .: secondary particle size 2.3 to 2.7 μm) 11.9 parts polyvinyl alcohol R1130 (manufactured by Kuraray Co., Ltd.) 5.1 parts water 83 parts
“Composition 5”
Combustion method dry silica 50 (manufactured by Nippon Aerosil Co., Ltd .: secondary particle size 0.229 μm) 15 parts polyvinyl alcohol PVA-217 (manufactured by Kuraray Co., Ltd.) 3 parts water 82 parts
<Reference Example 1>
A polyester film (manufactured by PTH-50 Unitika Co., Ltd.) was used as the transfer substrate, and a coating solution of composition 5 was applied to the transfer substrate at a dry coating amount of 10 g / m 2 using a bar coater. Coating was performed to obtain a surface layer. Before this surface layer is dried, a coating liquid of composition 1 is dried on a base material (OK Prince fine quality 127.9 g / m 2, manufactured by Oji Paper Co., Ltd.) using an air knife coater. The surface glossiness of the ink jet recording medium is 18% with a 60 degree gloss meter by superimposing on the surface of the base layer that has been coated and dried so as to be 20 g / m 2, and after drying, the transfer substrate is peeled off. An inkjet recording medium for print proofing was manufactured.
[0047]
<Reference Example 2>
In Reference Example 1 , the same procedure as in Reference Example 1 was performed, except that the base layer was previously formed on the base material using the coating liquid of composition 2, and the surface glossiness of the ink jet recording medium was 60 ° gloss meter. An inkjet recording medium for 18% print proofing was produced.
[0048]
<Reference Example 3>
In Reference Example 1 , the same procedure as in Reference Example 1 was performed, except that the base layer was previously formed on the base material using the coating solution of composition 3, and the surface glossiness of the ink jet recording medium was 60 ° gloss meter. A 21% ink jet recording medium for print proofing was produced.
[0049]
<Example 1>
In Reference Example 1 , the same procedure as in Reference Example 1 was performed, except that the base layer was previously formed on the base material using the coating liquid of composition 4, and the surface glossiness of the ink jet recording medium was 60 ° gloss meter. A 20% ink jet recording medium for print proofing was produced.
[0050]
<Comparative Example 1>
In the same manner as in Reference Example 1 , a coating solution of composition 1 was applied onto a substrate (OK Prince fine quality 127.9 g / m2, manufactured by Oji Paper Co., Ltd.) using an air knife coater in a dry coating amount of 20 g / The coating liquid of composition 5 is coated and dried to a dry coating amount of 10 g / m 2 using a bar coater on the base layer that has been coated and dried so as to be m2, and is inkjet. An ink jet recording medium for printing calibration in which the surface glossiness of the recording medium was 10% with a 60 degree gloss meter was manufactured.
[0051]
<Comparative example 2>
In Comparative Example 1, the same operation as in Reference Example 1 was carried out except that the base layer was formed on the base material using the coating solution of composition 2, and the surface glossiness of the inkjet recording medium was 9 with a 60 degree gloss meter. % Ink jet recording medium for print proofing.
[0052]
<Comparative Example 3>
Glossy paper (Professional Photo Paper, manufactured by Canon Inc.) having a surface glossiness of 46% with a 60 ° gloss meter was used as a commercially available inkjet recording medium for printing calibration.
[0053]
<Comparative Example 4>
A commercially available inkjet recording medium has a surface glossiness of 21% with a 60-degree gloss meter (INK-JET PROOF Semi-Gloss (Pearl coat type) Akiguchi, manufactured by Mitsubishi Paper Industries Co., Ltd.) Was used as an inkjet recording medium for printing proofreading.
[0054]
<Comparative Example 5>
Commercially available coated paper for offset printing (OK Topcoat N 127.9 g / m ² , manufactured by Oji Paper Co., Ltd.) was used as the substrate for offset printing.
[0055]
With respect to the ink-jet recording medium for print calibration except for Comparative Example 5 obtained by the above procedure, ink-jet recording was performed using BJ F870 (manufactured by Canon Inc.) as an ink-jet printer to obtain an image. Regarding the base material for offset printing of Comparative Example 5, the same image as the ink jet recording was color-separated into Y, M, C, and K, and offset printing consisting of 175 line Y, M, C, and K4 color printing was performed to obtain an image. .
[0056]
The evaluation items as an ink jet recording medium for print proofing were ink absorptivity, color reproducibility, texture of the unrecorded part, undulation and glare of the recorded part. The results are shown in Table 6. Each evaluation item was determined in three stages, ◯, Δ, and ×. If the result is a determination of Δ or more, there is no practical problem. The filler in each ink receiving layer, the ratio of the secondary particle size of dry silica, and the A / B value are also shown.
[0057]
<Ink absorbability>
Ink absorptivity is obtained by recording only the secondary solid colors of red, green, and blue, and by recording solid lines of yellow, magenta, cyan, green, and blue while recording solid red. Bleeding was observed between the solid recording and the solid recording. The evaluation criteria were as follows.
○: No thin lines or secondary color solids Δ: Some thin lines are blurred, but no secondary color solids x: Both thin lines and secondary solid colors are blurred
<Color reproduction range>
As for the color reproduction range, inkjet recording was performed using IT 8.7 / 3, and color measurement of L * a * b * was performed 24 hours after printing. Then, the color measurement results of L * a * b * were represented on the color space, and compared with the color gamut obtained by the offset printing of Comparative Example 5. The evaluation criteria were as follows.
○: Completely covers the color gamut of offset printing. △: Some of the color gamut of offset printing cannot be reproduced slightly. ×: The color reproduction range is small compared to the color gamut of offset printing.
<Texture>
The texture when compared with the printing paper used in Comparative Example 5 and the printed image portion was visually determined. The image of the ink jet recording unit includes ISO / JIS-SCID high-definition color digital standard image data N1a. TIFF was used. The evaluation criteria were as follows.
○: Inkjet unrecorded part has texture of printing paper Δ: Inkjet unrecorded part slightly different from printing paper texture x: Texture completely different from printing paper
<Material texture by swell and glare>
The undulation and glare of the ink jet recording portion were determined visually. To determine the undulation and glare of the ink jet recording portion, the ISO / JIS-SCID high-definition color digital standard image data N1a. TIFF was used. The evaluation criteria were as follows.
○: No swell or glare △: Slight swell or glare, but the texture of the recording part is not impaired compared to the printed matter ×: The texture of the recording part is inferior to the printed matter due to swell or glaring [0061]
[Table 1]

[0062]
As can be seen from Table 1, in Example 1 and Reference Examples 1 to 3 , there is no problem in ink absorbability, there is no problem in the color reproduction range compared to the color gamut of offset printing, and the texture of the printing paper is It was possible to obtain an ink jet recording medium suitable for print proofing having no deterioration in image quality due to waviness or glare on the surface of the ink jet recording medium. In Comparative Examples 1 and 2 that did not use the transfer method, both the waviness and glare caused by the unevenness of the surface of the ink jet recording medium were large, and the resulting deterioration in image quality was conspicuous and could not be used as a calibration ink jet recording medium. . Regarding Comparative Example 3, the ink absorptivity itself was good and the resulting image was very beautiful, but the texture was clearly a silver salt photographic tone and could not be used as a printing tone. As for Comparative Example 4, although it has a texture of printing paper and there is no waviness or glare, there is a problem in ink absorbability, and as a result, the color reproduction range becomes insufficient, so that it is used as a calibration inkjet recording medium. It was impossible.
[0063]
【The invention's effect】
In the inkjet recording medium for print calibration of the present invention, the ink receiving layer has sufficient ink absorbability, and as a result, can sufficiently cover the color reproduction range of offset printing and gravure printing, and further, the texture of printed paper and printed matter It is an ink jet recording medium for printing proof that is very excellent in that it has a texture equivalent to that of the printing proof.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an ink jet recording medium of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Underlayer 3 ... Surface layer 4 ... Ink receiving layer

Claims (3)

A transfer material provided with a base layer mainly composed of a wet silica filler and a binder on a base material and a surface layer mainly composed of dry silica and a water-soluble resin on the base material for transfer, The surface layer side is overlaid on the base layer, and after drying, the transfer substrate is peeled off,
Printing wherein the relationship between the secondary particle size (A) of the wet silica used for the underlayer and the secondary particle size (B) of the dry silica used for the surface layer satisfies 5 ≦ A / B ≦ 30 A method for producing an inkjet recording medium for calibration. The method for producing an inkjet recording medium for printing calibration according to claim 1, wherein the surface layer is transferred onto a substrate before drying.   3. The method for producing an ink jet recording medium for print calibration according to claim 1, wherein the underlayer and the surface layer are adjacent to each other.

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