JPH02873A - Transferred image forming method - Google Patents

Abstract

PURPOSE:To form the transferred image approximated to the quality of an ordinary offset printed image by transferring only the image part of a colored image onto a material to be transferred and subjecting the transferred image surface obtd. in such a manner to a surface roughening treatment. CONSTITUTION:Only the image part is transferred onto the material to be transferred from the colored image on a base formed by subjecting a colored image forming material having a colored photosensitive layer contg. a photosensitive compd. and coloring agent on a base to at least imagewise exposing and development processing and the surface of the transferred image obtd. in this way is subjected to the surface roughening treatment. The base surface is preferably subjected to a release treatment by a suitable oil-repellent material or a release layer is provided on the base in order to efficiently transfer the image onto the surface to be transferred and to facilitate the stripping of the base after the image transfer. For example, a silicone resin, fluoroplastic, etc., are usable as the oil-repellent material. The transferred image approximated to the image quality of the printed matter is obtd. in this way.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for forming a transferred image used as a color proof for color proofing in color printing. The present invention relates to a transfer image forming method that can obtain a transfer image that is extremely close to the image quality of a printed matter by roughening the surface of the transferred image.

[Prior Art] Color sheets for color proofing (
It is well known in the art that color proofs (also referred to as color proofs) are used.

As a method for creating a multicolor transfer image using a colored image forming material for color proofing, for example, Japanese Patent Application Laid-Open No. 47-4183
The so-called direct transfer method described in Publication No. 0, in which a colored image is directly transferred and laminated onto the final receiver paper, for example, JP-A-59-97
No. 140 discloses the so-called indirect transfer method in which a colored image is temporarily transferred and laminated onto a temporary image-receiving sheet and then transferred again onto a final image-receiving paper, and JP-A-56-5
Examples include the method described in Japanese Patent No. 01217, in which the process of transferring a colored photosensitive layer to image-receiving paper and then repeating the process of forming an image is repeated.

[Problems to be Solved by the Invention] In all of these methods, the surface of the transfer material containing the transferred image is coated with a thermoplastic organic polymer layer, so the gloss of the resulting image surface is too high, making it difficult to This has the disadvantage that it gives an impression different from the image quality of the printed matter in printing. 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. ing. For that purpose, a so-called matte sheet with a roughened surface is superimposed on the image surface of the colored image formed from the colored image forming material onto the transfer material, and the sheet is passed between heated and pressurized nip rolls. Conventionally, the surface gloss of an image is reduced by passing the image through the surface, in which case the surface of the thermoplastic organic polymer layer covering the colored image on the transfer material is roughened. However, even with such operations, the problem remains that the quality of the printed image formed only with ink on the printing paper cannot be completely eliminated.

In order to solve the above problems, the present inventors have already
A colored image forming material having a colored photosensitive layer containing a photosensitive composition and a colorant on a support is subjected to imagewise exposure and development treatment to form a colored image, and then substantially only the colored image area is removed. 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 it to a transferred material.

The present invention relates to improvements in the above-mentioned transfer image forming method, and more specifically, provides a transfer image forming method that can form a transfer image that is extremely similar in image quality to the image quality of a print image formed on printing paper using only ink. The purpose is to

[Means for solving the problem] The above object is to perform at least imagewise exposure and development processing on a colored image forming material having a colored photosensitive layer containing a photosensitive composition and a colorant on a support. Achieved by a transfer image forming method characterized by transferring substantially only the image area from the colored image formed on the support to a transfer material and roughening the surface of the obtained transfer image. be done.

The present invention will be explained in further detail below.

The colored image forming material used in the transfer image forming method of the present invention has a colored photosensitive layer containing at least a photosensitive composition and a colorant on a support, and is developed after imagewise exposure through a color separation mesh film. , a colored image is formed. From the obtained colored image, only the image part is directly transferred onto the transfer material.
Laminated.

In this case, in order to efficiently transfer the image onto the surface to be transferred and to make it easier to peel off the support after image transfer, the surface of the support should be treated with a release treatment using an appropriate oil-repellent substance, or the support should be Preferably, a release layer is provided on the body.

As the oil-repellent substance, for example, silicone resin, fluororesin, fluorosurfactant, 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 a wired solvent as an adhesive. The so-called dry lamination method involves applying these adhesives onto a support, drying them with hot air or heating, and then overlapping a polypropylene film or a polyethylene film and laminating by pressing and 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 using an extrusion method, and then laminated by pressing a support while the film remains in the molten state.

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, Hydroxyethylcellulose, carboxymethylcellulose, cyanethylcellulose, cellulose acetate, cellulose triacetate, cellulose acetate butyrate, hydroxypropylmethylcellulose phthalate, hydroxypropylmethylcellulose hexahydrophthalate, or a mixture thereof is used.

The thickness of the release layer is suitably in the range of 0.01 μm to 30 μm, particularly preferably in the range of 0.1 μm to 5 μm.

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

The colored photosensitive layer is imagewise removed by development following imagewise exposure to form a colored image.

In the present invention, 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, and the solvent On the other hand, all compounds such as monomers, prepolymers, and polymers whose solubility changes and whose exposed or unexposed areas are dissolved and removed when a certain type of solvent is applied are included. 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 photoradical polymerization or photoionic polymerization can also be used. In addition, examples of so-called positive-positive type compositions that increase the solubility in exposed areas include photosensitive resin compositions containing 0-quinonediazide as a photosensitive substance; specifically, 1,2-benzoquinonediazide-4 -sulfonyl chloride, 1.2-naphthoquinonediazide-4-manifonyl chloride, 1.2
-naphthoquinonediazide-5-sulfonyl chloride,
A compound obtained by condensing 1.2-naphthoquinonediazide-6-sulfonyl chloride with a hydroxyl group- and/or amino group-containing compound is preferably used.

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

Regarding the above O-quinonediazide compound, please refer to Zarani J
, written by KO8AR “L +ght S ensltiV
eSystem” (Wiley&5ons,
New York, 1965) and Nagamatsu, Inui, Photosensitive Polymer Paper (Kodansha).

(1977).

Roughly positive-positive type compounds: i) Compounds that can generate acid upon irradiation with actinic rays, 11) Compounds that have at least one bond that can be decomposed by acid, and
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, as the binder constituting the colored photosensitive layer, a polymer compound is used which is film-forming and solvent-soluble, and preferably dissolves or swells in an alkaline developer.

Specific examples of such polymeric compounds include, for example, polymeric compounds containing a structural unit having an aromatic hydroxyl group represented by the following general formula [I] in its molecular structure.

Here, R1 and R2 are a hydrogen atom, an alkyl group, or a carboxylic acid group, R3 is a hydrogen atom, a halogen atom, or an alkyl group, R4 is a hydrogen atom, an alkyl group, a phenyl group, or an aralkyl group, and X is a nitrogen atom and an aromatic carbon Connect with atoms 2
In the valent organic group, 0 is O or 1, and Y is a phenylene group which may have a substituent or a naphthylene group which may have a substituent.

Specifically, examples of the seven polymers forming the structural unit represented by the above general formula [I] include N(4-hydroxyphenyl)-(meth)acrylamide, N-(2-hydroxyphenyl)-(meth) Acrylamide, N-(4-
Hydroxynaphthyl)-(meth)acrylamide, etc.
meth)acrylamides monomer; 0-lm- or p
-Hydroxyphenyl (meth)acrylate monomer; 0
-lm- or p-hydroxystyrene monomers and the like. Preferably, 0-lm- or p-hydroxyphenyl (meth)acrylate monomer, N-(4-hydroxyphenyl)-(meth)acrylamide monomer, more preferably N-(4-hydroxyphenyl)(meth)acrylamide. It is a monomer.

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

7 Acrylonitrile: CH2=CN Alkyl acrylate: CH2=CC-0R
' Acrylic acid M: CH22C-OH I 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;
0 to 95 mol% gives the most 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. The proportion of the compound in the compound is preferably 0 to 20 mol%, considering the development latitude, and 0 to 10 mol%.
Mole % is most preferred.

The weight average molecular weight of such a polymer compound is preferably 1,000 to 100,000 from the viewpoint of developability or resolution when a low alkaline aqueous solution is used as a developer, and more preferably a weight average molecular weight of 1,000 to 30,000. Preferably. These polymer compounds can be synthesized by a well-known copolymerization method.

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

CH.

1: IIl: n = (1-25): (5-40
): (50-95) In addition, 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, O-cresol, m-cresol, p-cresol, 3 , 5-xylenol, 2,4-xylenol, 2.5-xylenol, carvacrol, thymol, catechol, resorcinol, human Oquinone, piogal D-ol, phloroglucin, alkyl group (1 to 8 carbon atoms) substituted Examples include 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 novolac resin, m-talesol formaldehyde novolac resin, phenol/m-cresol/formaldehyde copolycondensate resin, phenol/p-cresol/formaldehyde copolycondensate resin, m-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, and the molecular weight is such that the mm average molecular IMW is 3500 to 500 and the number average molecular IMn is 1000 to 20.
A range of 0 is preferred.

The molecular weight of the resin is measured by GPC (gel permeation chromatography).

Calculation of the number average molecular weight ffiMn and the mm average molecular weight Mw is based on the “Journal of the Chemical Society of Japan” by Morio Takushoku, Tatsuya Miyabayashi, and Masayuki Naka.
The method described on pages 800 to 805 (1972) is used to level out the peaks of the oligomer region (connect the centers of the peaks and valleys).

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

Regarding pyrolysis gas chromatography, its principles,
The equipment and experimental conditions are, for example, published in the Journal of the Chemical Society of Japan, Takushoku
The method for qualitative analysis of novolac resins using pyrolysis gas chromatography is described by Morio Takushoku. The method described in "Analytical Chemistry °" by Takashi Naka and Masayuki Naka, Vol. 18, pp. 47-52 (1969) is followed.

Furthermore, other polymeric compounds that can be used as binders include sulfoalkyl esters of (meth)acrylic acid (co)polymers, vinyl acetal (co)polymers, vinyl ether copolymers, and acrylamide (co)polymers. Also included are 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 a tone matching the usual colors required for that purpose, such as yellow, magenta, cyan, and black, are required, but other materials such as metal powders, white pigments, fluorescent pigments, etc. is also used. The following examples are some of the many pigments and dyes known in the art.

(C, I mean color index).

Victoria Pure Blue (C, I 42595) Auramine (C, I 41000) Cathylone Brilliant Flavin (C, I Basic 13) Rhodamine 6GCP (C, I 45160) Rhodamine B (C, I 45170) Su7 Lanine 0K70
: 100 (C, I 50240) Erioglaucine X (C0142080) Fast Black HB
(C, 126150) N 0.1201 Lionol Yellow - (C, I 21090) Lionol Yellow G
RO (C, I 21090) Shimla Fast Yellow 8GF (C, I 21105) Benzidine Yellow 4 T-564D (C, + 21
095) Shimla Fast Red 4015 (C,
I 12355) Lionor Red 7 B12O3 (
C, I 15830) First Gen Blue TGR-
L (C, I 74160) Lionor Blue SM
(C, 126150) Mitsubishi Carbon Black M A -
100 Mitsubishi Carbon Black #30. #40. #5
0 The content of the colorant in the colored photosensitive layer used in the present invention is suitably, for example, 5% to 50% by weight.

The colorant/binder ratio of the colored photosensitive layer used in the present invention is:
It 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 to a developer. For example, in the case of dyes, the content ranges from 5% to 5% by weight.
75%; in the case of pigments, the content ranges from 5% to 90% by weight
is appropriate.

The thickness of the colored photosensitive layer can be determined by methods known to those skilled in the art, depending on the target optical density, the type of colorant (dye, pigment, carbon black) used in the colored photosensitive layer, and its content. , within the allowable range, the thinner the colored photosensitive layer is, the higher the resolution will be.
Image quality is good. Therefore, the film thickness is 0.117/
It is usually used in the range of n'' to 51 J/u'.

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 layer is present on the support side.

After imagewise exposure of the colored image forming material, development is performed to form a colored image. As a developer, an alkaline developer containing water as a main solvent is preferably used, and an alkaline agent used in the developer is used. Examples include sodium carbonate, sodium hydrogen carbonate, sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide, lithium hydroxide, tribasic sodium phosphate, dibasic sodium phosphate,
Inorganic alkaline agents such as tribasic potassium phosphate, dibasic potassium phosphate, tribasic ammonium phosphate, dibasic ammonium phosphate, sodium metasilicate, sodium bicarbonate, potassium carbonate, ammonium carbonate, ammonium silicate, and mono-, di- or Organic alkaline agents such as triethanolamine and tetraalkylammonia hydroxide are used.

The content of alkaline agent in the developer composition is 0.05
It is preferable to use the alkaline phenomenon liquid in a range of 30% by weight. , an antifoaming agent such as an organic silane compound, and the like.

In addition, general printing paper such as art paper, coated paper, high-quality paper, synthetic paper, etc. can be used as the transfer material to which the colored image forming material is developed after imagewise exposure and the formed colored image is transferred. can.

In the present invention, the surface of the transferred image transferred onto the transfer material is roughened so that its center line average roughness (Ra) is in the range of 0.1 to 10 μm, considering the closeness to the printed image. It is preferable to treat it, and a range of 0.2 to 3 μm is particularly preferable. In a range shallower than 0.1 μm, the surface gloss of the transferred image is too high, and in a range deeper than 10 μm, the gloss is too low, making it impossible to approximate the quality of the printed image.

Here, the center line average roughness (Ra) is the German standard DI
As shown in N4768, it is the arithmetic mean of the absolute value of the distance 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. Let the point on the roughness profile be (x,
y), the Ra value obtained by the following formula for a measurement length of 1 m is expressed in microns.

(Formula) Furthermore, there are various methods for roughening the surface of the transferred image formed on the transfer material of the present invention. Although not particularly limited, specifically, for example, the roughened surface of a so-called matte sheet having a roughened surface and the transfer image surface of the transfer material are brought into close contact with each other, for example, by applying pressure or applying pressure. Pressure is applied by passing between a pair of heated nip rolls,
Alternatively, a method may be used in which the matte sheet is peeled from the image surface after being subjected to pressure and heat treatment.

Various materials can be used for the matting sheet, including plastic films such as polyethylene terephthalate film, acetate film, polyvinyl chloride film, polystyrene film, polypropylene film, and polyethylene film, as well as metal foil, synthetic paper, Alternatively, composite materials of these may also be used.

There are various methods for roughening the surface of the material that will become the matte sheet, and specific examples include the following methods, but the method is not limited to these methods.

1) When the matte sheet is a thermoplastic film that softens at a relatively low temperature, especially an amorphous polymer film, the surface is engraved with a pattern or satin finish according to the purpose, and the surface is generally thinly plated with chrome. The surface of the film is roughened by passing the film between metal rolls under heating and pressure conditions.

2) When the matte sheet is a film produced by a solution casting method, instead of casting onto a mirror-finished drum or endless belt, the film is formed with a satin or matte surface. By using a drum or an endless belt, a film with a roughened surface can be produced directly.

3) The matting sheet is a polyester film, etc.
For films that have a high softening point and whose physical properties deteriorate when heated to near the softening temperature, a chemical method is used in which the film is soaked in a concentrated solution of phenol, cresol, etc. to erode the surface of the film, and then neutralized by washing with water. The surface of the film is roughened by a physical method in which carborundum, metal particles, etc. are strongly blown onto the film together with compressed air to create scratches.

In addition, the roughened surface of the matte sheet with the roughened surface adheres closely to the surface of the transferred image, and when pressure is applied or pressure and heat are applied, the transferred image becomes the roughened surface. In order to prevent adhesion and reverse transfer from the transferred material to the roughened surface of the matte sheet, it is preferable that a release treatment is performed.

The release treatment of the roughened surface of the matte sheet is preferably carried out using an appropriate oil-repellent substance, and examples of such oil-repellent substances include those mentioned above as specific examples of the support and the method for forming a release surface. are used in the same way.

In particular, since polypropylene film, polyethylene film, etc. exhibit good mold release properties without special mold release treatment, it is preferable to use a polypropylene film or polyethylene film with a roughened surface as the matting sheet. is most preferred.

The above-mentioned polypropylene film or polyethylene film with a roughened surface may be laminated with other relatively rigid supports such as polyethylene terephthalate film to increase rigidity and facilitate handling during work. can.

Another method for roughening the surface of the transferred image formed on the transferred material is to pass the transferred material on which the transferred image is formed between a pair of metal rollers or rubber rollers with roughened surfaces. A method of directly passing the material under pressure or under pressure and heat may also be mentioned. In this case, in order to prevent the transferred image from adhering to the metal roller or rubber roller, it is desirable that the surface of the metal roller or rubber roller be subjected to a release treatment, similar to the above-mentioned matte sheet.

The method of roughening the surface of the transferred image is not limited to the method exemplified above, but may include roughening the surface of the image,
Any method that achieves the purpose of reducing the surface gloss of the transferred image may be used.

[Example] <Example 1> A colored photosensitive layer dispersion having the following composition was placed on the polypropylene surface of a support obtained by dry laminating a 25 μm thick polypropylene film on a 50 μm thick polyethylene terephthalate film using a wire bar. 4. Apply and dry to a dry film thickness of 1 μm using
A colored image forming material was prepared.

(Colored photosensitive layer dispersion liquid composition) 2.3.4-trihydroxybenzophenone-naphthoquinone-1,2-diazide sulfonic acid ester 0.616 g phenol formaldehyde novolac resin (weight average molecular weight: 960, number average molecular weight: 496) 4.3
84 (1) Pigment Ethyl Cellosolve 39.6 g Fluorine surfactant 0.25 g (3M FC-430) (Pigment) Black 2 Carbon Black MA-100 (Mitsubishi Kasei) 0.99 (1 Cyanide)
Nidianin Blue 4920 (manufactured by Dainichiseika) 0. ssg magenta:
Seiryoku First Carmine 1483 (manufactured by Dainichiseika) 0.6841 Yellow:
Seiryoku Fast Yellow 1-1-7055 (manufactured by Dainichiseika Chemical Co., Ltd.) 0.68 (color separation mesh positive film of each color was superimposed on the polyethylene terephthalate film surface of the four-color colored image forming material obtained in step 1 or above, and 4KW Image exposure was performed for 20 seconds from a distance of 5Qcn+ using a metal halide lamp, and development was performed by immersing the image in the following developer for 30 seconds to form a colored image in four colors.

(Image solution) Sodium carbonate 15 (1) Surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50111 Distilled water 1000 (1) Next, the image surface of the black image and art paper were brought into close contact and heated to 90°C. The bond was passed between a pair of nip rolls at a speed of 50cn+/min under a pressure of 5K (1/Ci), and the support was peeled off. was transcribed.

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 portion was transferred onto the art paper, that is, the non-image portion of the paper was exposed.

Next, a 50 μm thick polypropylene film with a roughened surface (surface center line average roughness Ra = 1.06 μm 1p) was placed on the color proofing image surface on the art paper.
perthometer S 5 manufactured by erthen
The roughened surface of the sample (measured at ,
The polypropylene film was peeled off. At this time,
The center line average roughness (Ra) of the surface of the transferred image is 0.96μ
(Perthom manufactured by Perthen)
Measured at eter S5P. ) <Example 2.3> The center line average roughness of the roughened polypropylene film surface for roughening the transferred color blue ink image surface was Ra = 0.38 μm 1Ra, respectively.
= 2.26 μra (Perthen P
The color blue ink image surface was roughened in exactly the same manner as in Example 1, except that the roughening was carried out in the same manner as in Example 1, and Examples 2 and 3 were obtained, respectively.

The centerline average roughness of the transferred image surface obtained from this Example 2.3 is Ra = 0.28 μm1Ra =
2.16 μrn (manufactured by Perthen)
(measured with erthometer S5P).

The following results were obtained from Examples 1 to 3.

Adhesion, i.e., reverse transfer, of the transferred image onto the roughened surface of the polypropylene film is not observed, the image surface of the color proofing image on the art paper is roughened, and the resulting image quality is similar to that on the printing paper. The image quality was very similar to that of ordinary offset prints made with only ink.

<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) Toridine 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 0.616 (] Phenol/m-cresol/p-cresol (molar ratio 20:48: 32) Formaldehyde novolac resin (weight average molecular layer: 6685. Number average molecular weight: 12
33) 4.384 g Pigment below ethyl cellosolve 396 g Fluorine surfactant (manufactured by 3M Company, FC-430) o, zs
g (pigment) Black carbon black MA-100 (Mitsubishi Kasei@l) 0.99q cyanide
Nidianin Blue 4920 (Dainichisei Chemical Co., Ltd. > 0.55 (1 Magenta:
Seiriki First Carmine 1483 (Dainichiseika! It) 0.68 (+Yellow: Seika First Yellow H-7055 (Dainichiseika) 0. eaglqed 4
A color separation mesh positive film of each color was superimposed on the colored photosensitive layer surface of the colored image forming material, and image exposure was performed for 60 seconds from a distance of 50c+n using a 4KW metal halide lamp.
Development was carried out by immersion for 30 seconds in a 21-fold dilution of DR-1 (manufactured by Konica PS plate developer Nikonica ■) to form colored images in four colors.

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.

(Image receiving layer solution composition) Vinyl chloride/vinyl acetate copolymer (composition ratio 75:25.8 MPR-T-5 manufactured by Shinkagakusha Co., Ltd.)
) 18 (1 Pentaerythritol tetraacrylate 11 (1 Michler's ketone o, ig) Benzophenone 0.64 (1 para-methoxyphenol 0.018 (1 Methyl ethyl ketone and transferred the yellow image onto the image-receiving layer by passing the yellow image onto the image-receiving layer by passing it between a pair of nip rolls heated to 90° C. under a pressure of 5 KQ/Cv′ at a speed of 50 cm/min. The polyethylene terephthalate film on the color image side was peeled off.

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 blue ink 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, a 50 μm thick polypropylene film with a roughened surface (surface center line average roughness Ra = 1.06 μm,
Perthometer S manufactured by Perthen
The roughened surface (measured at 5 P) was brought into close contact with the
5Kg/(12
Infiltration passed at a speed of 50 cm/min under pressurized conditions,
The polypropylene film was peeled off. Although the surface gloss of the image was reduced, in this case, what was roughened was the surface of the transparent resin layer, which is the image-receiving layer covering the color proofing image, so the resulting image quality was
The image quality could not be completely dispelled from the image quality of ordinary offset printed matter, which is formed only with ink on printing paper.

<Example 4> A colored photosensitive layer dispersion having the following composition was applied using a wire bar onto the Bolibu-O-pyrene surface of a support obtained by dry laminating a 25 μm thick polypropylene film onto a 50 μm thick polyethylene terephthalate film. The coating was applied and dried to a dry film thickness of 1 μm.

(Colored photosensitive layer dispersion composition) Alkali-soluble polymer composition of the following composition (weight average molecular weight 17.000°, 50% methyl cellosolve solution) <1:fil:n=10:10:80) Pentaerythritol tetraacrylate 4. 39 Michler's zuketone 0.04Q benzophenone 0.25 (] paramethoxyphenol 0.01 (1) Methyl cellosolve 94 (1) Fluorine surfactant (manufactured by 3M, FC-430> 0.1
(J below pigment (pigment) Black 2 carbon black MA-100 (manufactured by Mitsubishi Kasei) 1.98 (1 cyan
Nidianin Blue 4920 (manufactured by Dainichiseika) 1.10g Magenta: Seiryoku Fast Carmine 1483 (manufactured by Dainichiseika) 1.36 (J Yellow:
Seikafu 7-St Yellow)-1-7055 (manufactured by Dainichiseika) 1.3613 The alkali-soluble polymer composition was synthesized by the following method.

12 In a four-bottle flask, add 8.851 J of human O-oxyphenylmethacrylamide, 2.65 J of acrylonitrile (1,
Methyl acrylate 33.11i; l, azobisisobutyronitrile (polymerization initiator) 1.64 (l) was weighed, 200 g of ethyl alcohol was used as a solvent, and 6
The reaction was allowed to take place for some time. After this, add 750 ml of methyl cellosolve.
The reaction was stopped, and ethyl alcohol was distilled off at 60° C. for 3 hours. As a result, the polymer composite acid has a concentration of 50%.
Approximately 95 g of % methyl cellosolve solution was obtained.

Next, on the colored photosensitive layer of each color, an overcoat layer solution having the following composition was applied using a wire bar until the dry film thickness was 0.3 μm.
It was coated and dried to produce four colored image forming materials.

(Overcoat layer solution composition) Polyvinyl alcohol (Nippon Gosei Kagaku Kogyo GL-05) 6a distillation, water 97 (I
A color separation network negative film of each color is superimposed on the overcoat layer surface of the four-color colored image forming material obtained with +3 g or more of methanol, and 4K
Image exposure was carried out for 20 seconds using a W metal halide lamp from a distance of 50 cm, and development was carried out by immersion in the following developer for 30 seconds to form colored images in four colors.

(Developer) Sodium carbonate is g surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50g distilled water
1000 (First, the image surface of the black color image and the art paper were brought into close contact with each other, and the paper was passed between a pair of nip rolls heated to 90°C at a speed of 50 cl/min under a pressure of 5 KG/Cf. After that, 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 portion was transferred onto the art paper, that is, the non-image portion of the paper was exposed.

Next, a 50 μm thick polypropylene film with a roughened surface (surface center line average roughness Ra = 1.291 tra,
Perthen'lsl Perthomet
er S 5 P) is adhered to the roughened surface,
This was passed between a pair of nip rolls heated to 90'C for 5
The polypropylene film was peeled off after passing through it at a rate of 50 C11 l/min under pressure conditions of Ko/Cf.

Adhesion of the transferred image onto the roughened surface of the polypropylene film, i.e. no reverse transfer is observed, the image surface of the color blue ink image on the art paper is roughened and the resulting image quality is similar to that on the printing paper. The image quality was very similar to that of ordinary offset prints made with only ink.

At this time, the center line average roughness (Ra) of the surface of the transferred image was 1.19 μlllr. (perthen?
Measured using Perthon + Eter S 5 P manufactured by F. ) [Effects of the Invention] As explained in detail above, according to the transfer image forming method of the present invention, only the image portion of the colored image is transferred onto the transfer material, and the surface of the obtained transfer image is roughened. The processing allowed the formation of transferred images that closely approximated the quality of conventional offset printed images.

Claims (1)

[Claims] A colored image-forming material having a colored photosensitive layer containing a photosensitive composition and a colorant on the support is subjected to at least imagewise exposure and development treatment to substantially remove the colored image on the support. 1. A transfer image forming method, comprising: transferring only an image portion to a transfer material; and roughening the surface of the obtained transfer image.