JPH023060A - Color picture image forming material and process for forming transferred picture image using said material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field J] The present invention relates to a colored image forming material used for color proofing in color printing. The present invention relates to a colored image-forming material capable of producing a color image and a transfer image-forming method using the color image-forming material.

[Prior Art] It is known in this field that a color sheet for color proofing (also called color proof) is used in the pre-process of main printing in multi-color printing (to save the labor and time of producing proofs). A well-known method for creating a multi-p+ transfer image using a colored image forming material for 61-color proofing is to directly receive R-rays from a colored image, as described in Japanese Patent Publication No. 347-41830.・The so-called direct transfer method that transfers and laminates onto image paper, for example λ, JP-A-59-9714
The so-called indirect transfer method described in Publication No. 0, in which a colored image is transferred and laminated onto a temporary image-receiving sheet at ~.times, and then transferred again onto a final image-receiving set, is also described in JP-A-56-50
For example, the method disclosed in Japanese Patent Application No. 1217, M, involves repeating the process of forming an image after transferring a colored photosensitive layer to image-receiving paper.

In both of these methods, the surface of the transfer material is coated with a thermoplastic organic polymer layer, so the problem is that the resulting image surface has too high gloss, giving an impression different from the image quality of the printed matter. have.

Since color proofs for color proofing are originally used to predict the image reproduction of the final printed matter, it is strongly desired that the image reproducibility of the colored image forming material be very close to that of the printed matter. There is. For that purpose, a so-called matte sheet with a roughened surface is superimposed on the image surface of a colored image formed on a transfer material from a colored image forming material, and is placed between heated and pressed nip rolls. It has been conventional practice to reduce the surface gloss of an image by passing it through the image.

[Problems to be Solved by the Invention] However, these steps are time-consuming and labor-intensive, and are troublesome for workers. Furthermore, the roughened surface is
Since the surface of the thermoplastic organic polymer covers the colored image on the transfer material, the impression received from the image formed from the colored image forming material is different from that of the actual printed image formed only with ink on the printing paper. , had the disadvantage that the textures were very different.

In order to solve the above problems, the present inventors have already
A colored image forming material having a colored photosensitive layer containing a small amount of a photosensitive composition and a colorant on a support is imagewise exposed and developed to form a colored image, and then substantially the colored image is formed. We have proposed a colored image-forming material and a method for forming a transferred image, which can form a transferred image with image quality similar to that of a printed matter by transferring only a portion of the image onto a transferred material.

The present invention relates to improvements in the above-mentioned colored image-forming materials, and more specifically, a colored image-forming material and a transferred image that can form a transferred image that is extremely similar in quality to a printed image formed only with ink on printing paper. The purpose is to provide a forming method.

Means for Solving Problem E] The above object is (1) in a colored image forming material having a colored photosensitive layer on a support, the colored photosensitive layer containing at least a photosensitive composition and a colorant; This is achieved using a colored image-forming material whose layer side surface is roughened.

(2) A colored image forming material having a colored photosensitive layer containing at least a photosensitive composition and a colorant on a support is subjected to imagewise exposure and then developed to form a colored image. This is achieved by a transfer image forming method in which only a portion of the support is transferred onto a material to be transferred, characterized in that the surface of the support on the colored photosensitive layer side is roughened.

The present invention will be briefly explained in detail below.

The colored image forming material of the present invention has a colored photosensitive layer containing a photosensitive composition and a colorant on a support with a roughened surface, and is imagewise exposed through a color separation mesh film. It is then developed to form a colored image. The obtained colored image is directly transferred and laminated onto a transfer material, and then the support is peeled off. In this case, in order to efficiently transfer the image onto the surface to be transferred and to make it easy to peel off the support after image transfer, the surface of the support must be subjected to mold release treatment using an appropriate oil-repellent substance. It is preferable to provide a surface or a release layer on the support.

As the oil-repellent substance, for example, silicone resin, fluororesin, fluorine surfactant, polyolefin, polyamide, etc. can be used.

Since polypropylene films, polyethylene films, and the like exhibit good mold release properties without special mold release treatment, a particularly preferred embodiment includes an example in which a polypropylene layer or a polyethylene layer is provided, which is thinner than the thickness of the support.

Methods for forming a polypropylene layer or a polyethylene layer on a support include: 1) Using a solution of polyvinyl acetate, polyvinyl chloride, epoxy resin, polyurethane resin, natural rubber, synthetic rubber, etc. dissolved in an organic solvent as an adhesive. This is the so-called dry lamination method, in which these adhesives are applied onto a support, dried by hot air or heating, and then a polypropylene film or polyethylene film is overlaid and laminated by pressure bonding under heat.

2) Use ethylene and vinyl acetate, copolymers of ethylene and acrylic acid ester, polyamide resin, petroleum resin, rosin, waxes, or mixtures thereof as adhesives, and heat these adhesives while keeping them in a molten state. , After coating on a support by a doctor blade method, roll coating method, gravure method, reverse roll method, etc., immediately attach a polypropylene film or a polyethylene film, heat it to a high temperature as necessary, and then cool it. The so-called hot-melt lamination method is used to laminate.

3) The so-called extrusion lamination method, in which polypropylene or polyethylene is kept in a molten state, extruded into a film by separate extrusion, and while this is in the molten state, a support is pressed and laminated.

4) When forming a film to serve as a support by melt extrusion, multiple extruders are used to form a polypropylene layer or a polyethylene layer on the support film by molding two times with polypropylene or polyethylene in a molten state. The so-called coextrusion method. etc.

Examples of the release layer include alcohol-soluble polyamide, alcohol-soluble nylon, a blend of a partially esterified resin of a copolymer of styrene and maleic anhydride and methoxymethylated nylon, polyvinyl acetate, polyacrylate, polymethyl Copolymers of methacrylate and acrylate, polyvinyl chloride, copolymers of vinyl chloride and vinyl acetate, polyvinyl butylade, cellulose acetate phthalate, methylcellulose, ethylcellulose, cellulose diacetate, cellulose triacetate, polyvinyl alcohol, butylcellulose, Human oxyethylcellulose acetate, cellulose triacetate, cellulose acetate butyrate, hydroxypropylmethylcellulose phthalate, hydroxypropylmethylcellulose hexahydrophthalate, or mixtures thereof may be used.

The thickness of the M-type layer is suitably in the range of 0.01 .mu.m to 30 .mu.m, particularly preferably in the range of 0.01 .mu.m to 5 .mu.m.

As the transparent support used in the colored image forming material of the present invention, a polyester film, particularly a biaxially oriented polyethylene terephthalate film is preferable in terms of dimensional stability against water and heat, but acetate film, polyvinyl chloride film, and polystyrene film are preferable. , polypropylene film, polyethylene film may also be used.

In the present invention, the surface of the support on the colored photosensitive layer side is roughened, and there are various methods for roughening the surface. Specifically, for example, the following method is used. However, the method is not limited to these methods.

1) If the support is a thermoplastic film that softens at a relatively low temperature, especially an amorphous polymer film, the surface of the support is engraved with a pattern or satin finish depending on the purpose, and the surface is generally coated with a thin layer of chrome. The surface of the film is roughened by passing it between a pair of plated metal rolls under heated and pressurized conditions.

2) When the support is a film produced by a solution casting method, the film is usually cast onto a mirror-finished drum or an endless belt, but instead, it is cast onto a mirror-finished drum or an endless belt. ! A roughened film is produced directly by using a drum with a brushed surface or an endless belt.

3) If the support is a film such as a polyester film that has a high softening point and whose physical properties deteriorate when heated to near the softening temperature, the film may be immersed in a concentrated solution of phenol, cresol, etc. to erode the surface of the film. The surface of the film is roughened by a chemical method such as neutralization by washing with water, or a physical method in which carbon particles, metal particles, etc. are strongly blown onto the film together with compressed air to create scratches.

In addition, the center line average roughness (Ra) of the surface of the roughened support used in the present invention is in the range of 0.1 to 10 μm, considering the similarity to the printed image quality of the transferred image. Preferably, a range of 0.2 to 3 μm is particularly preferred.

In a range shallower than 0.1 μm, the surface gloss of the transferred image becomes high, and in a range deeper than 10 μm, the gloss becomes low.
In either case, approximation to the printed image quality may not be achieved.

Here, the center line average roughness (Ra) is defined by the German standard IDlN
4768, it is the arithmetic average of the absolute values of the distances from the center line of the roughness profile to each point on the profile, with the horizontal center line as the X axis and the vertical direction as the Y axis. and the point on the roughness profile is (X, V
), the Ra value obtained by the following formula for a measurement length of 1 m is expressed in microns.

(Formula) The colored photosensitive layer is a layer in which exposed or unexposed areas are removed image-wise by imagewise exposure and subsequent development to form a colored image.

Various photosensitive compositions can be used as the photosensitive composition contained in the colored photosensitive layer, but when irradiated with actinic rays, its molecular structure undergoes a chemical change in a short period of time, resulting in a loss of solubility in the solvent. It includes all compounds such as monomers, prepolymers, and polymers whose exposed or unexposed portions are dissolved and removed when a certain solvent is applied. Examples of photosensitive compositions that can be used include photocrosslinkable photosensitive compositions, such as those made by esterifying polyvinyl alcohol with cinnamic acid, which are so-called negative-positive type compositions in which the solubility of exposed areas decreases. There are resin systems, systems in which diazonium salts and their condensates are mixed with polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide, etc., and systems in which aromatic azide compounds are used as photocrosslinking agents and mixed with binders such as cyclized rubber. Photosensitive resins using radical photopolymerization or photoionic polymerization can also be used. In addition, so-called positive-positive type products that increase the solubility of exposed areas include, for example, 0
-There are photosensitive resin compositions containing quinonediazide as a photosensitive substance, specifically, 1,2-penzoquinonediazide-
4-sulfonyl chloride, 1,2-naphthoquinonediazide-4-manifonyl chloride, 1,2-naphthoquinonediazide-5-sulfonyl chloride, 1,2-naphthoquinonediazide-6-sulfonyl chloride and hydroxyl group- and/or amino group-containing compound A compound obtained by condensing is preferably used.

Examples of the hydroxyl group-containing compound include trihydroxybenzophenone, dihydroxyanthraquinone, bisphenol A1 phenol novolak resin, resorcin benzaldehyde condensation resin, and pyrogallol acetone condensation resin. Examples of amino group-containing compounds include aniline, p-7 minodiphenylamine, p-aminobenzophenone, 4,4'-diaminodiphenylamine, 4.
Examples include ゜4-diaminobenzophenone.

Regarding the above O-quinonediazide compound, J
, written by KO5AR II 10ht 3 enSitiV
e3system” (Wiley & 5ons
, New York, 1965) and Nagamatsu, Inui''
゛Photosensitive polymers'° (Kodansha.

(1977).

Roughly positive-positive type compounds: i) Compounds that can generate an acid upon irradiation with actinic rays; ii) Compounds having at least one bond that can be decomposed by an acid;
1ii) Photosensitive resin compositions containing novolac resins containing two or three different phenols can also be used.

The appropriate content of the photosensitive composition in the colored photosensitive layer used in the present invention is, for example, 5 to 80% by weight.

Further, in the present invention, the colored photosensitive layer generally contains a binder, and such a binder has film-forming properties and solvent solubility, and is preferably soluble or swellable in an alkaline developer. A polymer compound is used.

Specific examples of such polymer compounds include the following -
Examples include polymer compounds containing a structural unit having an aromatic hydroxyl group represented by [I] in its molecular structure.

Here, R1 and R2 are hydrogen atoms, alkyl groups, or carbon atoms, R3 is hydrogen atoms, halogen atoms, or alkyl groups, R4 is hydrogen atoms, alkyl groups, phenyl groups, or aralkyl groups, and X is nitrogen atoms and aromatic carbon atoms. is a divalent organic group linked to , where the opening is O or 1, and Y is a phenylene group which may have a substituent or a naphthylene group which may have a substituent.

Specific examples of monomers forming the structural unit represented by the above-mentioned - clothing [I] include N(4-hydroxyphenyl)-(meth)acrylamide and N-(2-hydroxyphenyl)-(meth)acrylamide. , N-(4-
Hydroxynaphthyl)-(meth)acrylamide, etc.
meth)acrylamides monomer; 0-lm- or p
-Hydroxyphenyl (meth)acrylate-1 to seven;
Examples include o-lm- or p-hydroxystyrene monomers. Preferred are O-lm- or p-hydroxyphenyl (meth)acrylate monomers, N-(4-hydroxyphenyl)-(meth)acrylamide monomers, and most preferably N-(4-hydroxyphenyl)=(meth)acrylate monomers. ) is an acrylamide monomer.

In the present invention, it is preferable to use a copolymer of a monomer forming the structure represented by the general formula [I] and the following heptamer as the binder.

Acrylonitrile: CH,=CN R' Alkyl acrylate: CH,=CC-0R
' Acrylic acids: CH,=C C-〇H Here, R5 represents a hydrogen atom, an alkyl group, or a halogen atom, and R6 represents an alkyl group, a phenyl group, or a naphthyl group.

The proportion of the group having an aromatic hydroxyl group represented by the general formula [I] in the above copolymer is preferably 1 to 30 mol%.

The proportion of units formed from the acrylonitriles in the copolymer is preferably 0 to 50 mol%, and more preferably 5 to 40 mol% in consideration of developability. The proportion of the structural units formed from the above-mentioned alkyl acrylates is preferably 50 to 95 mol% from the viewpoint of developability with a low alkaline aqueous solution;
A concentration of 0 to 95 mole % also provides suitable developability.

In addition to the above-mentioned structural units, the above-mentioned acrylic acids such as acrylic acid or methacrylic acid may be copolymerized with the above-mentioned structural units, such as acrylic acid or methacrylic acid, in addition to the above-mentioned structural units. Considering the development latitude, the proportion in the compound is preferably 0 to 20 mol%, and 0 to 10 mol%.
Mole % is most preferred.

The weight average molecular weight of such a polymer compound is preferably from 1000 to 100.000, more preferably from 1000 to 30.000, from the viewpoint of developability or resolution when a low alkaline aqueous solution is used as a developer. Preferably, the range is . These polymer compounds can be synthesized by a well-known copolymerization method.

Specific examples of such polymer compounds include copolymers having the following structure.

CH1: m: n = (1-25): (5-40)
:(50-95) Furthermore, in the present invention, a novolak resin obtained by polycondensation of at least one type of phenol and an active carbonyl compound may also be used as a binder.

These phenols include all compounds in which at least one hydrogen atom bonded to an aromatic ring is substituted with a hydroxyl group, and specifically include phenol, 0-cresol, anti-cresol, p-cresol, 3. 5-xylenol, 2.4=xylenol, 2,5-xylenol,
carvacrol, thymol, catechol, resorcinol,
Examples include hydroquinone, pyrogallol, phloroglucin, and alkyl group (1 to 8 carbon atoms) substituted phenol.

Active carbonyl compounds include, for example, aldehydes and ketones, and specific examples include formaldehyde, acetaldehyde, benzaldehyde, acrolein, furfural, and acetone.

Examples of polycondensation resins include phenol formaldehyde novolak resin, m-cresol formaldehyde novolak resin, phenol/m-cresol/formaldehyde copolycondensate resin, phenol/p-cresol/formaldehyde copolycondensate resin, l-cresol/p- Cresol/formaldehyde copolycondensate resin, 0-cresol/p-cresol/formaldehyde copolycondensate resin, phenol/0-cresol/m-cresol/
Examples include formaldehyde copolycondensate resin, phenol/0-cresol/p-cresol/formaldehyde copolycondensate resin, and phenol/m-cresol/p-cresol/formaldehyde copolycondensate resin.

A preferred novolac resin is a phenol formaldehyde novolac resin, with a molecular weight of fttM
w is 3500 to 500, number average molecular weight Mo is 1000 to
A range of 200 is preferred.

The molecular weight of the resin is measured by GPC (gel permeation chromatography). Calculation of number average molecular weight Mn and Ichikawa average molecular weight IMW was carried out by Morio Takushoku;
Tatsuya Miyabayashi, Masayuki Naka, Journal of the Chemical Society of Japan” aoo page~
Level the peaks of the oligomer region (connect the centers of the peaks and valleys) by the method described on page 805 (1972).
method.

In addition, in the novolac resin, pyrolysis gas chromatography (PGC) is used as a method for confirming the quantitative ratio of different phenols used in the synthesis thereof.

Regarding pyrolysis gas chromatography, its principles,
If the equipment and experimental conditions are
The method for qualitative analysis of novolak resins using pyrolysis gas chromatography is described in the New Book New Experimental Course, Volume 19, Polymer Chemistry [■] pages 474-485 (published in 1978 by Maruzen), etc., by Morio Takushoku. The method described in Analytical Chemistry, Vol. 18, pp. 47-52 (1969) by Takashi Yamanaka and Masayuki Naka is used.

Further, other polymeric compounds that can be used as a binder in the present invention include sulfoalkyl esters of (meth)acrylic acid (co)polymers, vinyl acetal (co)polymers, vinyl ether (co)polymers, and acrylamide. Also included are (co)polymers, styrene (co)polymers, cellulose derivatives, and the like.

In the present invention, dyes and pigments are added as colorants to the colored photosensitive layer. In particular, when used for color proofing, pigments and dyes with the same color tone as yellow, magenta, cyan, and black are required, but other materials such as metal powders, white pigments, and fluorescent pigments are also required. used. The following examples are some of the many pigments and dyes known in the art.

(c, r mean color index).

Victoria Pure Blue (C,! 42595) Auramine (C, I 41000) Cathylone Brilliant Flavin (C, r Basic 13) Rhodamine 6GCP (C, 145 to 0) Rhodamine B (C, I 45170) Safranin 0K70:
100 (C, +50240) J-IJ Oglaucine X (C, 142080) Fast Black HB
(C, I 26150) N 0.1201 Lionol Yellow = (C, I 21090) Lionor Yellow GRO (C, I 21090) Shimla Fast Yellow 8GF (C, r 21105) Benzidine Yellow 4 T-5640 (C, I 210
95ns Shimla Fast Red 4015 (C, I
12355) Lionor Red 734401 (C,
I 15830) First Gen Blue T' G R
-1, (C, 174 to 0') Lionor Blue SM
(C, I 26150) Mitsubishi Carbon Black MA-
1 (10 Mitsubishi Carbon Black #30. #40. #50 The content of the colorant in the colored photosensitive layer used in the present invention is suitably 5% to 50% by weight, for example.

Further, the colorant/binder ratio of the colored photosensitive layer used in the present invention can be determined by a method known to those skilled in the art, taking into consideration the target optical density and the removability of the colored photosensitive layer with respect to a developer. For example, in the case of dye, its content is 5% to 75% by weight, and in the case of pigment, its content a is heavy IH1″b
% to 90% is appropriate.

In addition, the film thickness of the colored photosensitive layer shall be determined by a method known to those skilled in the art based on the optical a degree, the type of colorant (dye, pigment, carbon black) used in the colored photosensitive layer, and its content. However, within the allowable range, the thinner the colored photosensitive layer is, the higher the resolution and the better the image quality. Therefore, the film thickness is 0. , I
It is usually used in the range of Q/u' to 5 g/i'.

In addition to the above-mentioned materials, a plasticizer, a coating property improver, etc. may be added to the colored photosensitive layer, if necessary.

Examples of plasticizers include various low-molecular compounds such as phthalate esters, triphenyl phosphates, and maleate esters, and examples of coating properties improvers include fluorine-based surfactants and nonions such as ethyl cellulose polyalkylene ether. Surfactants such as activators can be mentioned.

Further, the colored photosensitive layer can be divided into two layers: a coloring agent layer made of a colorant and a binder, and a photosensitive layer made of a photosensitive composition and a binder. In this case, it does not matter which type of material is present on the support side.

The developing solution used when the above-mentioned imagewise exposed colored image forming material is subjected to a development process to form a colored image is preferably an alkaline developing solution containing water as a main solvent. The alkaline agent that can be used is
Sodium carbonate, sodium bicarbonate, sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide, lithium hydroxide, trisodium phosphate, sodium diphosphate, potassium triphosphate, potassium diphosphate, Non-scaly alkaline agents such as ammonium triphosphate, ammonium diphosphate, sodium metasilicate, sodium bicarbonate, potassium carbonate, ammonium carbonate, ammonium silicate, as well as mono-, di- or triethanolamine and tetraalkylammonium hydroxide. Various alkaline agents are used. Further, the content of the alkaline agent in the developer composition is preferably in the range of 0.05 to 30% by weight. The alkaline developer includes a specific solvent such as ethylene glycol monophenyl ether, benzyl alcohol, and low propyl alcohol, a surfactant, a chelating agent such as raphite, and EDTA, and an antifoaming agent such as Migiiso silane compound. It can also contain.

Further, as the transfer material to which the colored image formed from the colored image forming material is transferred, general printing paper such as art paper, coated paper, high-quality paper, synthetic paper, etc. can be used.

[Examples] The present invention will be explained below with reference to Examples, but the present invention is not limited by these.

<Example 1> A 25 μm thick polypropylene film with a roughened surface on a 50 μm thick polyethylene terephthalate film (surface centerline average roughness Ra = 1.06)
μm, perthome manufactured by Perjhen
A colored photosensitive layer dispersion having the following composition was applied using a wire bar to a dry film thickness of 1 μm on the roughened polypropylene surface of the support laminated using a dry lamination method (measured with terS5P), and dried. Then, four colored image forming materials were prepared.

(Colored photosensitive layer dispersion liquid composition) 2.3.4-Trihydroxybenzophenone-naphthoquinone-1,2-diazide sulfonic acid ester 0.6 g Phenol formaldehyde novolac resin (weight average molecular weight: 960, number average molecular weight: 496 ) 4.3
84 g Pigment below Ethyl cellosolve 39.6 (J Fluorine surfactant 0.25Q (3M
FC-430) (Pigment) Black Carbon Black MA-100 (Mitsubishi Kasei@l) 0.99 (1 Cyanide Nidiane Blue 4920 (Dainichiseika) 0155g Magenta: Seiryoku First Carmine 1483 (Dainichisei) Chemicals) 0.680 Yellow: Seika First Yellow H-7055 (Dainichiseika Chemicals) 0.68g or more of the four-color colored image forming material obtained by overlaying a colored color separation network positive film on the polyethylene terephthalate film surface. In total, image exposure was performed for 20 seconds from a distance of 5 Qcm using a 4KW metal halide lamp, and development was performed by immersing in the following developer for 30 seconds to form a colored image in four colors.

(Developer) Sodium carbonate 15 (]Surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50g Distilled water
1000 (Firstly, the image surface of the black color image and the art paper were brought into close contact with each other, and passed between a pair of nip rolls heated to 90°C at a speed of 50 cm/min under a pressure of 5K (1/cm2) After this, the support was peeled off.The peeling was easily performed and a black image was transferred onto the art paper.

Subsequently, colored images were transferred in the order of cyan, magenta, and yellow to obtain a color proofing image consisting of four colors on art paper.

<Example 2.3> The center line and average roughness of the surface of a polypropylene film with a roughened surface, which is laminated on a polyethylene terephthalate film, are Ra = 0.38 μm, respectively.
Examples 2 and 3 were carried out in exactly the same manner as in Example 1, except that Ra -2, 26 μta (measured with Perthometer S 5 P manufactured by Perthen) was used.

The following results were obtained from Examples 1 to 3.

Only the colored image part is transferred onto the art paper, i.e.
The paper surface of the non-image area is exposed, and the surface of the transferred image is roughened, making it a normal offset print that is formed only with ink on the printing paper without further roughening the surface of the transferred image. A transferred image was formed that closely resembled the image quality of .

Comparative Example 1 A release layer coating solution having the following composition was applied onto a polyethylene terephthalate film having a thickness of 75 μm so that the dry film thickness was 0.5 μm to prepare a support having a release layer.

(Release layer coating liquid composition) Torezin F-30 (alcohol-soluble nylon, manufactured by Toshi) 10 g Methanol 90 (First, prepare colored photosensitive layer dispersions in four colors with the following composition, and the dry film thickness becomes 1 μm. The film was coated on the release layer in the same manner as above to prepare image forming materials in four colors.

(Colored photosensitive layer dispersion liquid composition) 2.3.4-Trihydroxybenzophenone-naphthoquinone-1,2-diazide sulfonic acid ester 0.6 gphenol/m-cresol/p-cresol (mole ratio 20:48: 32) Formaldehyde novolac resin (weight average molecular weight: 6685. Number average molecular weight: 12
33) 4.384 (] The following pigment ethyl cellosolve 39.6 i) Fluorine surfactant (manufactured by 3M, FC-430) o, zsg
(Pigment) Black: Carbon black MA-100 (manufactured by Mitsubishi Kasei) 0.99g Cyan Nidianin Blue 4920 (manufactured by Dainichiseika) 0.550 Magenta: Seika Firth 1 to Carmine 1483 (manufactured by Dainichiseika) 0.68g Yellow: Seika First Yellow l-1-7055 (manufactured by Dainichiseika) 0.68 (1 obtained 4
A colored color separation mesh positive film is superimposed on the colored photosensitive layer surface of the colored image forming material, and image exposure is performed for 60 seconds from a distance of 5 Qcm using a 4KW metal halide lamp to form a 5D image.
21 of R-1 (Konica PS version carrier liquid manufactured by Nikonica + tl)
Developed by immersing it in a diluted solution for 30 seconds.
A colored image was formed.

Next, an image-receiving layer solution having the following composition was applied onto another polyethylene terephthalate film to a dry film thickness of 20 μm and dried to prepare an image-receiving sheet.

Vinyl chloride/vinyl acetate copolymer (composition ratio 75:25.8 MPR-T-5 manufactured by Shinkagakusha Co., Ltd.)
) 18 g Pentaerythritol tetraacrylate 11 g Michler's ketone o, ig Benzophenone 0.64 g Paramethoxyphenol 0.018 Q Methyl ethyl ketone 449 The previously obtained yellow image was brought into close contact with the image-receiving layer surface of the image-receiving sheet and heated to 90"C. The yellow image is transferred onto the image-receiving layer by passing it between a pair of nip rolls under a pressure of 5 kg/Ci' at a speed of 50 cm/min, and the polyethylene terephthalate film on the color image side is peeled off. did.

Subsequently, the colored image is transferred in the order of magenta, cyan, and black, and the image side of the image-receiving sheet is brought into close contact with art paper, and the image-receiving sheet is passed between a pair of nip rolls under the same conditions as described above. 50c with 4KW metal halide lamp on polyethylene terephthalate film surface
Full-surface exposure was applied for 30 seconds from a distance of m, and then the polyethylene terephthalate film of the image-receiving sheet was peeled off.

A multicolor proofing image was formed on art paper, but since the entire surface of the resulting image was covered with a transparent resin layer that was an image-receiving layer, the gloss of the image surface was too high.
The image quality of the printed matter was different from that obtained by ordinary offset printing.

Next, on the color blue ink image surface on the art paper covered with the transparent resin layer serving as the image-receiving layer, a polypropylene film having a thickness of 50 μm and having a roughened surface was applied to the center line average roughness Ra = 1.06 μm. , Pert
Manufactured by hen company p erthoIRetE! rS 5
The roughened surface of polypropylene (measured at The film was peeled off. Although the surface gloss of the image was reduced, in this case the surface of the transparent resin layer, which is the image-receiving layer covering the color proofing image, was roughened, so the resulting image quality was I couldn't get over the feeling that the image quality was different from that of ordinary offset printed matter, which is formed only with ink on paper.

<Example 4> A 25 μm thick polypropylene film with a roughened surface was placed on a 50 μm thick polyethylene terephthalate film (surface centerline average roughness Ra = 1.29)
μm, perthom manufactured by Perthen
eterS5P) on the roughened polypropylene surface of the support laminated by dry lamination method.
A colored photosensitive layer dispersion having the following composition was coated using a wire bar so that the dry film thickness was 1 μm and dried.

(Colored photosensitive layer dispersion liquid composition) Alkali-soluble polymer composition with the following composition (model average molecular weight 17,000°, 50% methyl cellosolve solution) Pentaerythritol tetraacrylate Michler's ketone benzophenone paramethoxyphenol methyl cellosolve fluorine-based surfactant (manufactured by 3M Company, FC-430) The following pigment (M material) Black: Carbon black MA-100 (manufactured by Mitsubishi Kasei) 1.98 (1 cyan)
Nidianin Blue 4920 (Dainichiseika) 1.10 (14.3g O,0411 0,250 0.01 (1 4g 0.1g) Magenta: Seiki First Carmine 1483 (Dainichiseika) 1.36 (+ yellow:
Seikafu? -St Yellow)-1-7055 (manufactured by Dainichiseika Chemical Co., Ltd.) 1, 36 (]The alkali-soluble polymer composition was synthesized by the following method.

12 In a four-bottle flask, add 8.85 (1) hydroxyphenylmethacrylamide and 2.65 (1) acrylonitrile.
Methyl acrylate 3311Q, azobisisobutyronitrile (polymerization initiator) 1.64 g were weighed and
Using ethyl alcohol ( ) as a solvent, the reaction was carried out at 77°C for 6 hours. After this, 75 ( ) of methyl cellosolve was added,
The reaction was stopped and ethyl alcohol was distilled off at 60°C for 3 hours. As a result, about 95 g of the polymer composition was obtained as a 50% methyl cellosolve solution.

Next, an overcoat layer coating solution having the following composition was applied onto the colored photosensitive layer using a wire bar until the dry film thickness was 0.3 μm.
It was coated and dried to obtain a color image forming material of 4 colors.

(Overcoat layer coating liquid composition) Polyvinyl alcohol (GL-05 manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd.) 6 (1) Distilled water 9713 methanol 3 g or more A colored image forming material of 4 colors was obtained with a color separation network on the overcoat layer surface. The negative films were stacked together, imagewise exposed for 20 seconds from a distance of 50 cm using a 4KW metal halide lamp, and developed by immersion in the following developer for 30 seconds to form a colored image in four colors.

(Developer) Sodium carbonate 159 surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50g Distilled water
1000 g Next, the image surface of the black color image and the art paper were brought into close contact and passed between a pair of nip rolls heated to 90°C at a speed of 50 c++/min under a pressure of 5K(]/Cm'. After passing through the paper, the support was peeled off.The peeling was easily performed and a black image was transferred onto the art paper.

Subsequently, colored images were transferred in the order of cyan, magenta, and yellow to obtain a color proofing image consisting of four colors on art paper. Only the colored image part is transferred onto the art paper, that is, the paper surface of the non-image part is exposed, and the surface of the transferred image is roughened, so that the surface of the transferred image is not roughened. A transferred image was formed that closely resembled the image quality of a normal offset print made only with ink on a printing paper.

[Effects of the Invention] As described in detail above, by using the armpit color image forming material and the transfer image forming method of the present invention, a transfer image that is very close to the image quality of a print image formed on printing paper using only ink can be obtained. I was able to do that.

Patent applicant Kuchinika Co., Ltd. (and one other person) Representative Patent attorney Miyao Ichinose

Claims (2)

[Claims] (1) A colored image forming material having a colored photosensitive layer containing at least a photosensitive composition and a colorant on a support, characterized in that the surface of the support on the side of the colored photosensitive layer is roughened. Colored image forming material. (2) A colored image forming material having a colored photosensitive layer containing at least a photosensitive composition and a colorant on a support is subjected to imagewise exposure and then developed to form a colored image, in which substantially only the image area is formed. A transfer image forming method in which a colored photosensitive layer side surface of the support is subjected to a roughening treatment.