JPS63206749A - Image forming method - Google Patents

Abstract

PURPOSE:To simplify a color forming operation and to stabilize the quality of a colored image by bringing a coloring agent layer of a coloring agent imparting material and a photosensitive layer of a photosensitive sheet into tight adhesion and transferring the coloring agent layer to the uncured part of the photosensitive layer. CONSTITUTION:The photosensitive sheet A formed with the photosetting photosensitive layer 2 which is tacky at room temp. between a protective sheet 1 and a transparent sheet 3 and the coloring agent imparting material B formed with the coloring agent layer 5 via a release layer 7 on a base 6 are used in a method for forming a color sheet for colorproofing. The surface of the layer 2 exposed by removing the protective sheet 1 of the sheet A is laminated on an image receiving material 4 of coated paper or the like and the image is exposed by active rays from the sheet 3 side. The sheet 3 is then stripped and the layer 2 is brought into tight adhesion with the layer 5 surface of the material B to transfer the layer 5 to the uncured tacky part of the layer 2. The colored image is formed on the material 4 when the base 6 is stripped.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an image forming method, and more specifically, a colored image forming method useful as a positive color sheet (color proof) for color proofing that can easily replace printing methods. It is related to.

[Conventional technology]

In any of the printing methods, lithography, letterpress, or gravure, a picture or photographic image is expressed as a set of halftone dots.In particular, in the case of color printing, printing is mainly done in four colors: indigo, red, yellow, and ink. Since the ink is overprinted, a printing plate is created for each color. To make these printing plates,
A halftone dot positive or halftone negative film is required for each color separated printing ink from a color original. The production of these color separation halftone films requires specialized technology, and the finished quality almost never achieves the goals of the planner or the customer, and the halftone film must be corrected or replaced through a proofing process. is normal.

To calibrate halftone films, create printing plates for each color using halftone films corresponding to each color, and reproduce color images by attaching these printing plates to a printing machine and printing in color. However, many proof printing methods are used to examine the correction points on the halftone film. This method has the disadvantage that the quality is not stable due to many variable factors such as printing press settings, ink-water balance, ink amount, etc., and it takes a long time. A method that can reproduce images is desired.

On the other hand, as a simple color image reproduction method (color proofing), US Pat.
The method described in Japanese Patent No. 60025 is known. In this method, an uncolored photopolymerizable photosensitive film that is sticky at room temperature is heated and laminated onto an image-receiving sheet, and then the tackiness is changed by image exposure, and then a colored image is formed depending on the tackiness of the colored powder provided. It is something that forms.

[Problem that the invention seeks to solve]

This method is called the subprint method, and the color tone reproducibility of these methods is quite similar to that of printed matter.
It has the following drawbacks.

That is, in order to visualize the image on the image-receiving material, after image exposure and peeling off the transparent sheet, a colored powder is applied to the surface of the photosensitive layer including the exposed and cured areas and the unexposed and uncured areas. It is necessary to lightly rub the surface with a pad or roller to remove excess colored powder and stick the colored powder only to the unexposed and uncured areas.
The image forming process is complicated, and there are variations in the strength and amount of adhesion of the colored powder to the unexposed and uncured areas, resulting in a lack of stable reproducibility and uniformity of image density.

Furthermore, during such work, if the worker inhales the colored powder dust thrown into the air, there is a risk that it may have a negative effect on the human body.

Accordingly, an object of the present invention is to provide an image forming method that allows easy image forming operations, provides stable colored image quality, and does not adversely affect the human body.

[Means for solving problems]

For this purpose, a photosensitive sheet with a structure in which a photocurable photosensitive layer that is adhesive at room temperature is laminated between a transparent sheet and a protective sheet, and the photosensitive layer exposed by removing the protective sheet. Laminate and adhere to other image-receiving materials so that they are in contact with them, ■ imagewise expose them to actinic light from the transparent sheet side, and ■ peel off the transparent sheet to remove the entire photosensitive layer, including all exposed and cured areas as well as unexposed and uncured areas. (1) by bringing the surface of the photosensitive layer into close contact with the surface of the colorant layer of a colorant-added material having a colorant layer on the support, and then peeling off the support of the colorant-imparted material; This is achieved by transferring the colorant layer only to the uncured tacky areas.

[Specific configuration of the invention]

The present invention will be explained in more detail below.

As the transparent sheet used in the photosensitive sheet of the present invention, a polyester film, especially a two-wheel stretched polyethylene terephthalate film is preferable from the viewpoint of dimensional stability against heat, but acetate film, polyvinyl chloride film, polyskirene film, polyethylene film , polypropylene films may also be used. In particular, since the transparent sheet is also used in the heating and laminating process, it is preferable to use a biaxially oriented polyethylene terephthalate film, which has relatively good thermal stability.

On the other hand, the protective sheet does not necessarily have to be transparent, but the same transparent sheet as described above can be suitably used. In particular, it is preferable to use polyethylene film or polypropylene film, which have excellent releasability from the photosensitive layer.

Further, although these films may be used as they are, they may be subjected to a release treatment using a suitable oil-repellent substance or may be provided with an undercoat layer in order to improve their peelability from the photosensitive layer. Examples of oil-repellent substances include silicone resin,
A fluororesin and a fluorine-based surfactant, and as an undercoat layer, for example, alcohol-soluble polyamide, alcohol-soluble nylon, partially esterified resin of a copolymer of styrene and maleic anhydride, and methoxymethylated nylon are used. Blends, polyvinyl acetate, polyacrylate, copolymers of polymethyl methacrylate and acrylate, polyvinyl chloride, copolymers of vinyl chloride and vinyl acetate, polyvinyl butylade, cellulose acetate phthalate, methylcellulose, ethylcellulose,
Examples include those that have weak adhesion to the transparent support, such as cellulose diacetate, cellulose triacetate, and polyvinyl alcohol. The photocurable bad light layer of the present invention has adhesiveness at room temperature, and the exposed areas are photocured by image exposure and the adhesiveness disappears. The images are visualized by selectively metastasizing only those areas.

Therefore, the photosensitive layer composition used is one whose molecular weight increases and the hardness and softening temperature of the photosensitive layer change upon irradiation with actinic rays. Compositions having such properties include:
A photopolymerizable photosensitive composition containing an addition polymerizable unsaturated compound, a polymeric binder, and a photopolymerization initiator as main components is suitable.

The addition polymerizable unsaturated compound used in the photopolymerizable photosensitive composition is a viscous liquid at room temperature,
For example, unsaturated carboxylic acids, esters of unsaturated carboxylic acids and aliphatic polyhydroxy compounds, esters of unsaturated carboxylic acids and aromatic polyhydroxy compounds, unsaturated carboxylic acids and polyhydric carboxylic acids, and the aforementioned aliphatic polyhydroxy compounds. Examples include esters obtained by esterification reactions with polyhydric hydroxy compounds such as hydroxy compounds and aromatic polyhydroxy compounds.
For example, diethylene glycol di(meth)acrylate, triethylene gelicoldi(meth)acrylate,
meth)acrylate, polyethylene glycol dimethacrylate, trimethylolpropane tri(meth)acrylate, polyoxyethyltrimethylolpropane tri(meth)acrylate, pentaerythritol triacrylate, polyoxyethylpentaerythritol tetra(meth)acrylate, dipentaerythritol mono Examples include hydroxypentaacrylate, pentaerythritol triacrylate-β-hydroxyethyl ether, pentaerythritol tetramethacrylate, hydroquinone di(meth)acrylate, pyrogallol triacrylate, 2,2'-bis(4-acryloxy-jethoxyphenyl)propane, etc. It will be done. In addition,
Examples include (meth)acrylamides such as ethylene bis(meth)acrylamide and hexamethylene bis(meth)acrylamide, vinyl urethane compounds, and epoxy(meth)acrylates.

The polymeric binder is necessary to protect the above-mentioned viscous liquid addition-polymerizable unsaturated compound in a layered manner, and is compatible with the addition-polymerizable unsaturated compound and the photopolymerization initiator or sensitizer described below. Vinyl polymer compounds are particularly suitable in terms of solubility. Examples include (meth)acrylic acid ester copolymers such as methyl methacrylate/methacrylic acid copolymer, and vinyl ether copolymers such as methyl vinyl ether/alkyl maleic anhydride half ester, but are not limited thereto. Here, the mixing ratio of the addition polymerizable unsaturated compound and the polymeric binder should be adjusted so that the resulting photocurable photosensitive layer has tackiness at room temperature, and Although the appropriate ratio varies depending on the combination of the unsaturated compound and the polymeric binder, it is preferably in the range of 3:1 to 1:3 in terms of -i.

The photopolymerization initiator itself absorbs actinic rays and decomposes, or decomposes due to the action of the exacerbating agent described below, generating radicals and starting the addition polymerization of the aforementioned addition polymerizable unsaturated compound. Conventionally known ones can be used, such as p-Lert-butyltrichloroacetophenone, 2,2'-jethoxyacetophenone, 2
．． Acetophenones such as 2-dimethyl-2-hydroxyacetophenone; benzoin ethers such as benzoin, benzoin methyl ether, benzoin isobutyl ether, benzoin propyl ether; benzyl ketals such as benzyl dimethyl ketal, 1-hydroxycyclohexylphenyl ketone; Benzyl; benzophenone, 4,4'-bisdimethylaminobenzophenone (Michler's ketone), 2-chlorothioxanthone, 2
-methylthioxanthone, 2-ethylthioxanthone,
Ketones such as 2-isobrobylthioxanthone; peroxides such as benzoyl peroxide and di-tert-butyl peroxide; further biimidazole derivatives,
．． 4.6-tris(trichloromethyl)-1,3,5-
Examples include, but are not limited to, triazine, etc. The amount of photopolymerization initiator added can range from 0.01 to 20% by weight based on the addition polymerizable unsaturated compound, and is 0.01% to 20% by weight based on the addition polymerizable unsaturated compound. A range of .1 to 10% by weight is preferred.

Next, the sensitizer, which is used together with the photopolymerization initiator and is sometimes described as a component of the photopolymerization initiator, absorbs actinic rays and acts on the photopolymerization initiator to decompose it. For example, organic pigments such as xanthine, thioxanthin, merocyanine, and cyanine, or more specifically, coumarin derivatives such as 7-diethylamino-4-methylcoumarin, N I
dialkylaminostyryl derivatives such as N'-diethylaminostyryl benzothiozole, thiapyrylium salts or pyrylium salts such as 4-(4'-butoxyphenyl)-2,6-cyphenylthiavirillium verchlorate, 2
Conventionally known derivatives such as thiazoline derivatives such as -dibenzoylmethylene-N-methyl-β-naphthothiazoline and oxazole derivatives such as 2-(dimethylaminophenyl)benzoxazole can be used.

Other components used in the photopolymerizable photosensitive composition include:
Examples include polymerization accelerators (chain transfer agents) such as 2-mercaptobenzothiazole, ultraviolet absorbers, and plasticizers.

As the ultraviolet absorber, non-colored or light-colored ones are preferable, such as phenyl salicylate, p-ter
Salicylic acid UV absorbers such as t-butylphenyl salicylate and p-octylphenyl salicylate; 2,4
-dihydroxybenzophenone, 2-hydroxy-4-
Methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,
4'-dimethoxybenzophenone, 2-hydroxy-4
- Benzophenone UV absorbers such as methoxy-5-sulfobenzophenone; 2-(2'-hydroxy-5'-
methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-
di-tert-butylphenyl)benzotriazole, 2
-(2'-hydroxy-3' tert-butyl-5
'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3',5'-ditert
-butylphenyl)-5-chlorobenzotriazole,
2-(2'-hydroxy-3',5'-diter t-
Examples include benzotriazole-based ultraviolet absorbers such as amyl phenyl)benzotriazole.

The amount of the ultraviolet absorber used here is 0.
．． A range of 2 to 10% by weight is suitable, especially 0.5 to 5% by weight.
Heavy-duty quantitative is preferred.

As the plasticizer, the diallyl phthalates, polyethylene glycols, and alkyl phosphates used in -i can be used, and are particularly effective for adjusting the tackiness of the photocurable photosensitive layer.

When such a plasticizer is added, it is appropriate to use it in an amount of up to 10% by weight of the photosensitive layer.

The thickness of the photocurable photosensitive layer used in the present invention can be adjusted depending on the composition of the photosensitive layer, the transmittance to actinic rays, the surface shape of the target image-receiving material, etc.
A range of .mu.m is suitable, and a range of 5 to 10 .mu.m is particularly preferred.

The colorant-imparting material used in the image forming method of the present invention is:
A colorant layer containing a colorant is provided on a support.

As the binder constituting this colorant layer, a film-forming and solvent-soluble polymer compound is used.

Specific examples of this polymer compound include acrylic acid, methacrylic acid and their alkyl esters or sulfoalkyl esters, phenol resins, polyvinyl butyral, polyacrylamide, ethyl cellulose,
Cellulose derivatives such as cellulose acetate/cellulose acetate, cellulose acetate/propionate, cellulose acetate, benzylcellulose, cellulose propionate, other polystyrene, polyvinyl chloride, chlorinated rubber, polyisobutylene,
Polybutadiene, polyvinyl acetate, and their copolymers, cellulose acetate, cellulose propionate,
Examples include cellulose acetate phthalate.

Dyes and pigments are added to the colorant layer as coloring substances. 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,1 means color index).

Victoria Pure Blue (C, I42595) Auramine (C, I41000) Catione Brilliant Flavin (C, I Basic 13)
) Rhodamine 6GCP (C, 145160) Rhodamine B (C, I 45170) Safranin 0K70:100 (C, I 50240) Erioglaucine ) Lionor Yellow GRO (
C9I21090) Shimla Fast Yellow 8GF
(C, I21) 05) Benzidine Yellow 4T-564
0 (C, 121095) Shimla Fast Red 40
15(C,1)2355) Lionor Red 7B440
1(C,1)5830) First Gen Blue TGR-
L (C, 174160) Lionor Blue SM (C, 1
26150) Mitsubishi Carbon Black MA-100 Mitsubishi Carbon Black #30.1) 40.1I50 The colorant/binder ratio of the colorant layer used in the present invention is based on the ratio known to those skilled in the art, taking into account the target optical density. It can be determined by the method. For example, in the case of dyes, the content is 5% to 75% by weight, and in the case of pigments, the content is 5% to 75% by weight.
% to 90% is suitable.

The thickness of the colorant 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 colorant layer, and its content. If the thickness of the colorant layer is within the allowable range, the thinner the colorant layer, the higher the resolution and the better the image quality.

Therefore, the film thickness is usually used in the range of 1 g/n (~5 g/rrl).

In addition to the above-mentioned materials, the colorant layer contains
If necessary, additives such as plasticizers can be further contained.

As the support for the colorant-imparting material, polyester films, particularly two-wheel stretched polyethylene terephthalate films, are preferred, but acetate films, polyvinyl chloride films, polystyrene films, polyethylene films, polypropylene films, as well as paper, synthetic paper, and aluminum foil are also suitable. , metal foils such as copper foils, or composite materials thereof may also be used.

These supports may be used as they are, but after exposure and peeling off the transparent sheet, the surface of the photosensitive layer and the surface of the colorant layer of the colorant-imparting material are brought into close contact with each other, and selectively applied only to the uncured adhesive portions of the photosensitive layer. In order to facilitate the peeling of the colorant-applied material from the support after the colorant layer has been transferred, the surface of the support may be subjected to a release treatment using an appropriate oil-repellent substance, or a release treatment may be applied to the support. Layers can also be provided. Examples of oil-based substances include silicone resins, fluororesins, and fluorosurfactants, and examples of release layers include alcohol-soluble polyamides, alcohol-soluble nylons, and partial esters of copolymers of styrene and maleic anhydride. polyvinyl acetate, polyacrylate, copolymer of polymethyl methacrylate and acrylate, polyvinyl chloride, copolymer of vinyl chloride and vinyl acetate, polyvinyl butylade, Materials that have weak adhesion to the transparent support such as cellulose acetate phthalate, methylcellulose, ethylcellulose, cellulose diacetate, cellulose triacetate, and polyvinyl alcohol are used.

In order to produce the photosensitive sheet used in the image forming method of the present invention, the above-mentioned photocurable photosensitive layer components are dissolved in a suitable solvent, coated on the above-mentioned transparent sheet, dried, and then protected as described above. You can laminate the sheets.

Further, in order to produce a colorant-loaded material, the above-mentioned colorant layer components may be dissolved and dispersed in an appropriate solvent, coated on the above-mentioned support, and dried.

Next, to explain the image forming method of the present invention based on the drawings, the photosensitive sheet A according to the present invention manufactured as described above.
First, as shown in FIG. 1, the two sides of the photosensitive layer exposed by peeling off the protective sheet 1 are pasted on the four sides of an image-receiving material such as art paper or coated paper.

As a specific lamination method, two photosensitive layers having adhesive properties are superimposed on four surfaces of the image receiving material, and the layers are passed through a laminator under heat and pressure. The conditions for a laminator are usually a heating sensitivity of 60 to 150°C and a passing speed of 20 to 160°C.
(The appropriate range is J/min.) By heating and pressurizing when passing through the laminator, the two surfaces of the photosensitive layer and the surface of the image-receiving material 4 are sufficiently bonded, and the photosensitive layer 2 is completely laminated on the four surfaces of the image-receiving material. can do.

Next, the photosensitive layer 2 is imagewise exposed to active light from the side of the transparent sheet 3 (FIG. 2).

Various light sources are used for image exposure, such as an ultra-high pressure mercury lamp, a tungsten lamp, a mercury lamp, a xenon lamp, a fluorescent lamp, a CRT light source, and a laser light source.

Next, the transparent sheet 3 of the photosensitive sheet A laminated on the surface of the image-receiving material 4 is peeled off to leave the entire photosensitive layer including all exposed and cured areas and unexposed and uncured areas on the image-receiving material 4. The surface of the photosensitive layer 2 and the surface of the colorant layer 5 of the colorant-loaded material B are brought into close contact (FIG. 3), and the colorant layer 5 is selectively transferred only to the uncured adhesive area of the photosensitive layer 2, thereby coloring. By peeling off the support 6 of the colorant-loaded material B, a colored image is formed on the image-receiving material 4 (FIG. 4). 7 is a release layer of the colorant-loaded material.

Note that the portion of the colorant layer that is in close contact with the photosensitive layer area that has been cured by exposure is not transferred to the photosensitive layer side and remains on the support.

At this time, it is preferable to apply pressure in order to ensure good transfer of the colorant layer onto the photosensitive layer.

As a specific method of applying pressure, for example, the surface of the photosensitive layer and the surface of the coloring agent layer of the carbon-coating agent-imparting material are placed one on top of the other, and the layer is passed through a laminator under pressure. Pressure conditions are 1.0 to 10k.
g/cd, and the passing speed is suitably in the range of 20 to 160 cm/min. Moreover, the pressurizing operation can also be performed simply by rotating and moving a roller on the support of the colorant-loaded material.

In addition, when creating a multicolor proofing sheet, a photosensitive sheet is laminated in the same manner on top of the colored image already formed on the surface of the image-receiving material, and after the image is exposed and the transparent sheet is peeled off, other colors are printed. This is accomplished by sequentially repeating the operations of forming a colored image with the colorant-loaded material.

〔Example〕

EXAMPLES The present invention will be specifically explained below using Examples and Comparative Examples, but the present invention is not limited to these Examples.

(Example 1) A photosensitive liquid having the following composition was applied onto a 25 μm thick polyethylene terephthalate film using a wire bar, and heated at 60°C.
The layer was dried for 5 minutes in a hot air dryer to obtain a photocurable photosensitive layer having a thickness of 8 μm.

Polymethyl methacrylate (weight average molecular weight #30,000) 45
g triethylene glycol dimethacrylate 55 g 7-diethylamino-4-methylcoumarin g 2.2'-bis(2-chlorophenyl)-4,4'.

5.5'-tetraphenylbiimidazole 0.8 g 2-mercaptobenzothiozole 0.8 g Trichlorethylene 400 g Next, a 20 μm thick polypropylene film was overlaid on the surface of the photocurable bad light layer, passed through a rubber roller, and left at room temperature. This was laminated to produce a photosensitive sheet.

When the ultraviolet-visible absorption spectrum of this photosensitive sheet was measured by a known method, the transmittance near 365 nm was almost 0.

Next, on another 75 μm thick polyethylene terephthalate film, the following release layer solution was applied to a thickness of 0.5 μm, and the colorant layer dispersion was applied to a thickness of 2 μm.
Each layer was sequentially coated and dried to produce colorant-added materials in four colors: black, cyan, magenta, and yellow.

Peelable N solution> Torezin F-30 (alcohol-soluble nylon, manufactured by Toshi) 10g methanol
90g Colorant layer dispersion> Copolymerization condensation resin of phenol, m+, p- mixed cresol, and formaldehyde 8g The following pigments*
2g methyl cellosolve
A colored image was formed in the following manner using a photosensitive sheet obtained with 90 g* of pigment or more and four colors of colorant-imparted materials.

Peel off the polypropylene film on the back side of the photosensitive sheet and overlay the exposed back side of the photosensitive layer on the coated paper surface, 1)
The photosensitive layer was laminated on the surface of the coated paper by passing it between heated rolls at 5° C. at a speed of 150 cm/min.

A decomposed positive film corresponding to black was closely adhered to the polyethylene terephthalate film surface of this photosensitive sheet and exposed to light of 10 mJ/cj using a high-pressure mercury lamp. Next, the polyethylene terephthalate film on the surface of the photosensitive layer was separated by #J and the colorant layer surface of the black colorant-imparting material was brought into close contact with the exposed surface of the photosensitive layer, and the pressure was 50 cm/min at room temperature under a pressure of 5 kg/aJ. After passing through the nip rolls of a laminator at a speed of 1, the colorant-loaded material was peeled off from the support.

ml Ate was easily carried out, and the colorant layer in the portion in contact with the uncured adhesive area of the photosensitive layer was transferred to the photosensitive layer side, forming a black positive image on the coated paper. Further, the colorant layer in the portion of the photosensitive layer that was in contact with the exposed and cured area did not transfer to the photosensitive layer side, but remained on the support side of the colorant-applied material.

Next, in the same manner as described above, another photosensitive sheet is laminated on the coated paper on which the black positive image has been formed, and the image is exposed using a decomposed positive film corresponding to cyan.
and after peeling off the polyethylene terephthalate film,
The colorant layer surface of the cyan colorant-applied material was brought into close contact with the surface of the photosensitive layer, and a cyan positive image was formed on the coated paper on which the black positive image had been formed by the same operation.

Thereafter, magenta and yellow color images were formed in the same manner to obtain a multicolor image on coated paper.

The obtained multicolor image was very close to the printed image and was very good.

Next, another photosensitive sheet was similarly laminated onto another coated paper, and after exposure with a mask film having 25 solid patches with an l value of X1ca+ as shown in FIG.
Images were formed on coated paper with black colorant-loaded material.

Next, the reflection density of the 25 solid black patches reproduced on the coated paper was measured using a reflection densitometer, Macbeth RD-514 (using a visual filter), and the measured value was 1.85 for all 25 points. Ta.

(Comparative Example 1) A photosensitive sheet similar to that in Example 1 was prepared, and the photosensitive layer was laminated onto coated paper by the same operation as in Example 1. Then, an image was formed using a mask film shown in FIG. 5 of Example 1. Exposure was performed and the polyethylene terephthalate film was peeled off. Next, on the exposed surface of the photosensitive layer, a black powder obtained by mixing black particles obtained by dispersing carbon black (Mitsubishi Carbon Black MA-100, manufactured by Mitsubishi Kasei ■) in cellulose acetate and cellulose acetate particles at a ratio of 1:1 is applied. When the surface of the photosensitive layer was lightly rubbed with a cotton pad to remove excess black powder, the black powder adhered only to the unexposed and uncured areas of the surface of the photosensitive layer, and 25 particles appeared on the coated paper. The black solid patch was reproduced.The reflection density of the 25 reproduced black solid patches was measured using a reflection densitometer, Macbeth RD.
-514 (using a visual filter), the measured values were not constant and varied greatly, from 2.05 at the highest density to 1.40 at the lowest density.

Further, during the image forming operation, it was observed that fine black powder dust was scattered in the air.

(Example 2) A multicolor image was obtained on coated paper by carrying out exactly the same operation as in Example 1, except that the release layer solution and colorant layer dispersion of the colorant-loaded material were changed to those with the following compositions. Ta. The obtained multicolor image was very close to the printed image and was very good.

Peeling layer solution> CM-8000 (alcohol-soluble nylon, manufactured by Toshi)
0g Methanol 90g <Colorant layer dispersion> Hydroxyphenyl methacrylate/acrylonitrile/methyl methacrylate/maleic acid copolymer (30:
40:25:5) 8 g of the following pigments*
2g methyl cellosolve
90g * Pigment black; Mitsubishi Carbon Black MA-100 (Mitsubishi Kasei side type) Cyan; Lionor Blue NCB (manufactured by Toyo Ink ■) Magenta; Fastgen Super Red BN (manufactured by Dainippon Ink ■) Yellow; Lionor Yellow GR ( (manufactured by Toyo Ink ■) [Effects of the invention] As explained above, according to the image forming method of the present invention,
It has the advantage that the image forming operation is simple, stable and uniform colored image quality can be obtained, and there is no adverse effect on the human body due to inhalation of dust.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views showing the image forming method of the present invention in order of steps, and FIG. 5 is a plan view of a mask film used in Examples. A: Photosensitive sheet B: Colorant-immobilized material 1
...Protective sheet 2...Photocurable photosensitive layer 3.
... Transparent sheet 4 ... Image receiving material 5 ... Colorant layer 6 ... Support 7 ... Release layer Patent applicant Roku Konishi Photo Industry Co., Ltd. Mitsubishi Chemical Industries, Ltd. '', ;1.

Claims (2)

[Claims] (1) A photosensitive sheet with a structure in which a photocurable photosensitive layer that is adhesive at room temperature is laminated between a transparent sheet and a protective sheet. [1] The exposed photosensitive layer is removed by removing the protective sheet. Laminate and adhere to other image-receiving materials so that they are in contact with them, [2] imagewise expose them to actinic rays from the transparent sheet side, and [3] peel off the transparent sheet to include all exposed and cured areas as well as unexposed and uncured areas. In a colored image forming method, the entire photosensitive layer remains on the image-receiving material, [4] a coloring agent is applied to the surface of the photosensitive layer, and the image is visualized by applying the coloring agent to the uncured adhesive portion; Visualizing an image by bringing the colorant layer surface of a colorant-applied material formed on a support as a colorant layer into close contact with the surface of a photosensitive layer and transferring the colorant layer to the uncured adhesive area. An image forming method characterized by: (2) The image forming method according to claim 1, wherein the photocurable photosensitive layer comprises a composition containing at least an addition polymerizable unsaturated compound, a polymeric binder, and a photopolymerization initiator.