JP2538229B2 - Image forming method - Google Patents

Description

The present invention relates to an image forming method, and more specifically, to a color image forming method useful as a positive color sheet (color proof) for color proofing which can simply replace the printing method. It is about.

[Conventional technology]

In any of the lithographic, letterpress or gravure printing methods, a picture or photographic image is represented by a set of halftone dots. Especially in the case of color printing, mainly four colors of indigo, crimson, yellow and black are printed. Since it is overprinted with ink, a printing plate is produced for each color. In order to produce these printing plates, a halftone dot positive or halftone dot negative film corresponding to each printing ink color-separated from a color original is required. The production of these color-separated halftone films requires specialized technology, and the quality of the finished products rarely achieves the goals of the planner or the customer, and the halftone films are modified or replaced by a proofing process. Is normal.

To calibrate a halftone dot film, make a printing plate corresponding to each color using a halftone dot film corresponding to each color, and attach these printing plates to each printing machine to perform color printing to reproduce a color image. However, there are many proof printing methods that examine the correction points of halftone film. This method has the drawback that the quality is not stable due to many variables such as tailoring of the printing press, ink-water balance, ink amount, etc., and it takes a long time. A method capable of reproducing an image is desired.

On the other hand, as a simple color image reproducing method (color proof), methods described in US Pat. Nos. 3060024 and 3060025 are known. This method involves heating and laminating an uncolored photopolymerizable photosensitive film having tackiness at room temperature on an image-receiving sheet, and then changing the tackiness by imagewise exposure, and then giving a colored image depending on the tackiness of a given colored powder. Is formed.

[Problems to be solved by the invention]

This method is called a surprint method, and although the color tone reproducibility of the printed image is close to that of printed matter, it has the following drawbacks.

That is, in order to visualize the image on the image receiving material, after the image exposure and peeling of the transparent sheet, a colored powder is provided on the surface of the photosensitive layer including the exposed and cured areas, and the unexposed and uncured areas, and It is necessary to lightly rub the surface with a pad or roller to remove the excess colored powder and to stick the colored powder only to the unexposed and uncured areas, which makes the image forming process complicated and unexposed. There are variations in the adhesion strength and adhesion amount of the colored powder to the uncured area, and as a result, stable reproducibility and uniformity of image density are lacking.

Further, during such work, an operator may inhale the dust of the colored powder that has risen in the air, which may adversely affect the human body.

Therefore, the object of the present invention is to simplify the image forming work,
An object of the present invention is to provide an image forming method which can obtain a stable colored image quality and which does not adversely affect the human body.

[Means for solving problems]

The purpose is to protect the transparent sheet and the photocurable photosensitive layer, which has tackiness at room temperature, photo-cures the exposed part by image exposure to lose the tackiness, and does not lose the tackiness in the unexposed part. A photosensitive sheet having a structure laminated between the sheet and a colorant-provided material in which a colorant layer containing a colorant and a polymer binder is formed on the releasable surface of a support, Using a material, the protective layer is removed and the exposed photosensitive layer is laminated so as to be in contact with another image-receiving material and adhered, and the transparent sheet is imagewise exposed with an actinic ray, and the transparent sheet is peeled off. Then, the entire photosensitive layer including all exposed and cured regions and unexposed and uncured regions is left on the image receiving material, and the photosensitive layer surface and the colorant layer surface of the colorant-providing material are brought into close contact with each other, and The support of the colorant-providing material is peeled off, and the colorant layer is formed. Among the by transferring only the portion corresponding to the unexposed uncured areas is accomplished by causing indicia.

[Specific configuration of the invention]

 The present invention will be described in more detail below.

As the transparent sheet used in the photosensitive sheet of the present invention, a polyester film, particularly a biaxially stretched polyethylene terephthalate film is preferable in terms of dimensional stability against heat, but an acetate film, a polyvinyl chloride film, a polystyrene film, a polyethylene film. ,
Polypropylene film may also be used. In particular, since the transparent sheet is also used in the heating / laminating step, it is preferable to use a biaxially stretched polyethylene terephthalate film having relatively good thermal stability.

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

Further, these films may be used as they are, but may be subjected to a releasing treatment with an appropriate oil-repellent substance or an undercoat layer may be provided in order to improve the releasability from the photosensitive layer. The oil-repellent substance is, for example, a silicone resin, a fluororesin and a fluorosurfactant, and the undercoat layer is, for example, an alcohol-soluble polyamide,
Alcohol-soluble nylon, blend of partially esterified resin of copolymer of styrene and maleic anhydride, and methoxymethylated nylon, polyvinyl acetate, polyacrylate, copolymer of polymethylmethacrylate and acrylate, polychlorination Vinyl, copolymers of vinyl chloride and vinyl acetate, polyvinyl butyrate, cellulose acetate phthalate, methyl cellulose, ethyl cellulose, cellulose diacetate, cellulose triacetate, polyvinyl alcohol and the like having weak adhesion to a transparent support. To be The photocurable photosensitive layer of the present invention has tackiness at room temperature, and the image-exposed portion photocures the exposed portion to lose the tackiness, and the colorant layer is unexposed portion and uncured portion in a later step. The image is visualized only by selectively transferring to.

Therefore, as the photosensitive layer composition, a composition in which the molecular weight is increased by the irradiation of actinic rays and the hardness and the softening temperature of the photosensitive layer are changed is used. As a composition having such characteristics, a photopolymerization type photosensitive composition containing an addition polymerizable unsaturated compound, a polymer binder and a photopolymerization initiator as a main component 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 with aliphatic polyhydroxy compounds, esters of unsaturated carboxylic acids with aromatic polyhydroxy compounds, unsaturated carboxylic acids with polyvalent carboxylic acids and the aforementioned aliphatic polyhydroxy compounds. Examples thereof include a hydroxy compound, an ester obtained by an esterification reaction with a polyvalent hydroxy compound such as an aromatic polyhydroxy compound, and the like, and specific examples thereof are described in JP-A-59-71048. (Meth) acrylate, triethylene glycol di (meth)
Acrylate, polyethylene glycol dimethacrylate, trimethylolpropane tri (meth) acrylate, polyoxyethyl trimethylolpropane tri (meth) acrylate, pentaerythritol triacrylate, polyoxyethyl pentaerythritol tetra (meth) acrylate, dipentaerythritol monohydroxypenta Examples thereof include acrylate, pentaerythritol triacrylate-β-hydroxyethyl ether, pentaerythritol tetramethacrylate, hydroquinone di (meth) acrylate, pyrogallol triacrylate, and 2,2′-bis (4-acryloxy-diethoxyphenyl) propane. Other examples include (meth) acrylamides such as ethylene bis (meth) acrylamide and hexamethylene bis (meth) acrylamide, vinyl urethane compounds and epoxy (meth) acrylates.

The polymer binder is necessary for protecting the above-mentioned viscous liquid addition-polymerizable unsaturated compound in a layered form, and forms a phase with the addition-polymerizable unsaturated compound and the photopolymerization initiator or sensitizer described later. From the viewpoint of solubility, vinyl polymer compounds are particularly preferable. Examples thereof include, but are not limited to, (meth) acrylic acid ester copolymers such as methyl methacrylate / methacrylic acid copolymers and vinyl ether copolymers such as methyl vinyl ether / alkyl maleic anhydride half ester. Here, the mixing ratio of the addition-polymerizable unsaturated compound and the polymer binder should be adjusted so that the resulting photo-curable photosensitive layer has tackiness at room temperature, The suitable ratio varies depending on the combination of the unsaturated compound and the polymer binder, but in general, the range of 3: 1 to 1: 3 is preferable.

The photopolymerization initiator itself absorbs actinic rays and decomposes, or decomposes due to the action of the sensitizer described below to generate a radical, which causes the addition polymerization of the aforementioned addition-polymerizable unsaturated compound. It can be started, and conventionally known ones can be used, for example, acetophenones such as p-tert-butyltrichloroacetophenone, 2,2′-diethoxyacetophenone and 2,2-dimethyl-2-hydroxyacetophenone; benzoin, Benzoin ethers such as benzoyl methyl ether, benzoin isobutyl ether and benzoin propyl ether; benzyl dimethyl ketals, benzyl ketals of 1-hydroxycyclohexyl phenyl ketones and benzyl; benzophenone, 4,4'-bisdimethylaminobenzophenone (Michler's ketone) , 2-chlorothio Ketones such as xanthone, 2-methylthioxanthone, 2-ethylthioxanthone, and 2-isopropylthioxanthone; peroxides such as benzoyl peroxide and di-tert-butyl peroxide; and further biimidazole derivatives, 2,4,6- Examples include, but are not limited to, tris (trichloromethyl) -1,3,5-triazine and the like. The amount of photopolymerization initiator added is 0.01 to 20 relative to the addition-polymerizable unsaturated compound.
A range of wt% is possible, with a range of 0.1 to 10 wt% being particularly preferred.

Next, the sensitizer, which is used in combination with the photopolymerization initiator and is sometimes described as one component of the photopolymerization initiator, absorbs actinic rays and acts on the photopolymerization initiator to decompose the photopolymerization initiator. For example, xanthene-based, thioxanthene-based, merocyanine-based, cyanine-based organic dyes, or more specifically, coumarin derivatives such as 7-diethylamino-4-methylcoumarin, N, N ′-
Dialkylaminostyryl derivatives such as diethylaminostyrylbenzothiozole, thiapyrylium salts or pyrylium salts such as 4- (4'-butoxyphenyl) -2,6-diphenylthiapyrylium perchlorate, 2-dibenzoylmethylene-N-methyl Thiazoline derivatives such as -β-naphthothiazolyl, 2- (dimethylaminophenyl)
Conventionally known compounds such as oxazole derivatives such as benzoxazole can be used.

Examples of other components used in the photopolymerizable photosensitive composition include a polymerization accelerator (chain transfer agent) such as 2-mercaptobenzothiazole, an ultraviolet absorber and a plasticizer.

The UV absorber is preferably a non-coloring or light-coloring one, such as phenyl salicylate or p-tert.
-Butylphenyl salicylate, p-octylphenyl salicylate, and other salicylic acid-based UV absorbers; 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-methoxy-5
-Benzophenone-based UV absorbers such as sulfobenzophenone; 2- (2'-hydroxy-5'-methylphenyl)
Benzotriazole, 2- (2'-hydroxy-5'-
tert-butylphenyl) benzotriazole, 2-
(2'-hydroxy-3 ', 5'-ditert-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'-
Examples thereof include benzotriazole-based UV absorbers such as di-tert-amylphenyl) benzotriazole. The addition amount of the ultraviolet absorber used here is appropriately in the range of 0.2 to 10% by weight of the photosensitive layer, and particularly preferably 0.5 to 5% by weight.

As the plasticizer, generally used diallyl phthalates, polyethylene glycols, and alkyl phosphates can be used, and they are particularly effective for adjusting the tackiness of the photocurable photosensitive layer. When such a plasticizer is added, it is suitable to use it in the range of up to 10% by weight of the photosensitive layer.

The film thickness of the photocurable photosensitive layer used in the present invention can be adjusted by the composition of the photosensitive layer, the transmittance for actinic rays or the surface shape of the image receiving material to be treated, and the like.
The range of μm is suitable, and the range of 5 to 10 μm is particularly preferable.

The colorant-providing material used in the image forming method of the present invention comprises a colorant layer containing a colorant and a polymer binder provided on a support through a release layer.

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

Specific examples of this polymer compound include acrylic acid and methacrylic acid and their alkyl or sulfoalkyl esters, phenol resins, polyvinyl butyral, polyacrylamide, ethyl cellulose, acetic acid / cellulose acetate, acetic acid / propionate cellulose, and cellulose acetate. , Benzyl cellulose, cellulose derivatives such as cellulose propionate, other polystyrene, polyvinyl chloride, chlorinated rubber, polyisobutylene, polybutadiene, polyvinyl acetate, and their copolymers, cellulose acetate, cellulose propionate, cellulose acetate phthalate, etc. Can be mentioned.

Dyes and pigments are added as coloring substances to the colorant layer. In particular, when used for color proofing, ordinary colors required there, that is, yellow, magenta, cyan, pigments and dyes having a color tone that matches black are required, but other metal powders,
White pigments and fluorescent pigments are also used. The following are some of the many pigments and dyes known in the art. (CI stands for color index).

Victoria Pure Blue (C.I42595) Auramin (C.I41000) Catillon Brilliant Flavin (CI Basic 13) Rhodamine 6GCP (C.I45160) Rhodamine B (C.I45170) Safranine OK70: 100 (C.I50240) Erioglaucin X (C.I42080) First Black HB (C.I26150) No.1201 Rionol Yellow (C.I21090) Rionol Yellow GR0 (C.I21090) Shimura-First Yellow 8GF (C.I21105) Benzidine Yellow 4T-564D (C .I21095) Shimura-Fast Red 4015 (C.I12355) Lionol Red 7B4401 (C.I15830) Fastgen Blue TGR-L (C.I74160) Lionol Blue SM (C.I26150) Mitsubishi Carbon Black MA-100 Mitsubishi Carbon Black # 30, # 40, # 50 The colorant / binder ratio of the colorant layer used in the present invention is
It can be determined by a method known to those skilled in the art in consideration of the target optical density. For example, in the case of dyes, the content is suitably 5% to 75%, and in the case of pigments, the content is suitably 5% to 90%.

The thickness of the colorant layer can be determined by a method known to those skilled in the art depending on the target optical density, the type of colorant used in the colorant layer (dye, pigment, carbon black) and its content. If the thickness of the colorant layer is as thin as possible within the allowable range, the resolution is higher and the image quality is better. Therefore, the film thickness is usually being used in a range of ^{1g / m 2 ~5g / m 2} .

In addition to the materials described above, the colorant layer may further contain an additive such as a plasticizer, if necessary.

As the support for the coloring material-providing material, a polyester film, particularly a biaxially oriented polyethylene terephthalate film is preferable, but an acetate film, a polyvinyl chloride film, a polystyrene film, a polyethylene film, a polypropylene film, and further paper, synthetic paper, aluminum. A metal foil such as a foil or a copper foil, or a composite material thereof may be used.

These supports may be used as they are, but after exposure and peeling of the transparent sheet, the photosensitive layer surface and the colorant layer surface of the colorant-providing material are brought into close contact with each other, and only the uncured adhesive portion of the photosensitive layer is selectively selected. In order to facilitate the peeling of the support of the colorant-added material after transferring the colorant layer, a release treatment with an appropriate oil-repellent substance is applied to the surface of the support, or release is performed on the support. Provide layers. Examples of the oil repellent substance include silicone resin, fluororesin and fluorosurfactant, and the release layer includes, for example, alcohol-soluble polyamide, alcohol-soluble nylon, and partial ester of a copolymer of styrene and maleic anhydride. Resin, blend of methoxymethylated nylon, polyvinyl acetate,
Polyacrylate, copolymer of polymethylmethacrylate and acrylate, polyvinyl chloride, copolymer of vinyl chloride and vinyl acetate, polyvinyl butyrate, cellulose acetate phthalate, methyl cellulose, ethyl cellulose, cellulose diacetate, cellulose triacetate, polyvinyl A substance such as alcohol having a weak adhesion to the transparent support is used.

To prepare the photosensitive sheet used in the image forming method of the present invention, the photocurable photosensitive layer components described above are dissolved in a suitable solvent, coated on the transparent sheet described above, dried, and then protected as described above. The sheets may be laminated.

Further, in order to produce the colorant-provided 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, the image forming method of the present invention will be described with reference to the drawings. In the photosensitive sheet A according to the present invention manufactured as described above, first, the protective sheet 1 is peeled off as shown in FIG. The exposed two photosensitive layers are laminated so as to be attached to the four image receiving materials such as art paper and coated paper.

As a specific laminating method, the photosensitive layer 2 having adhesiveness is used.
The surface is superposed on the surface of the image receiving material 4 and is passed through a laminator under heat and pressure. As the conditions of the laminator, usually, a heating sensitivity of 60 to 150 ° C. and a passing speed of 20 to 160 cm / min are suitable. Heating when passing through such a laminator
By pressing, the surface of the photosensitive layer 2 and the surface of the image receiving material 4 are sufficiently adhered, and the photosensitive layer 2 can be completely laminated on the surface of the image receiving material 4.

Next, image exposure is performed with actinic rays from the transparent sheet 3 side of the photosensitive layer 2 (FIG. 2).

Various light sources 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 are used for image exposure.

Next, after peeling the transparent sheet 3 of the photosensitive sheet A laminated on the surface of the image receiving material 4 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-providing material B are brought into close contact with each other (FIG. 3), and the colorant layer 5 is selectively transferred only to the uncured adhesive region of the photosensitive layer 2 for coloring. The image-receiving material 4 is obtained by peeling the support 6 of the agent-providing material B.
A colored image is formed on top (FIG. 4). Reference numeral 7 is a release layer of the colorant-added material.

The portion of the colorant layer that is in close contact with the exposed and cured photosensitive layer region does not transfer to the photosensitive layer side and remains on the support.

At this time, in order to favorably transfer the color material layer onto the photosensitive layer, it is preferable to apply a pressure operation.

As a specific processing method, for example, the surface of the photosensitive layer and the surface of the colorant layer of the colorant-providing material are superposed and passed through a laminator under pressure. Pressurized condition is 1.0 to 10 kg / cm
^{2. The} proper passing speed is 20 to 160 cm / min. Further, the pressing operation can be performed by simply rotating and moving the roller on the support of the coloring agent-applied material.

Further, in the case of producing a multicolor proofing sheet, a photosensitive sheet is laminated on the colored image already formed on the image receiving material surface by the same method, and after exposure of the image and peeling of the transparent sheet, another color is applied. This is accomplished by sequentially repeating the operation of forming a colored image with the colorant-provided material.

〔Example〕

Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

Example 1 A 25 μm thick polyethylene terephthalate film was coated with a photosensitive solution having the following composition with a wire bar and dried in a hot air dryer at 60 ° C. for 5 minutes to form a photocurable photosensitive layer having a thickness of 8 μm. Obtained.

Polymethylmethacrylate (weight average molecular weight ≈30,000) 45
g triethylene glycol dimethacrylate 55 g 7-diethylamino-4-methylcoumarin 4 g 2,2'-bis (2-chlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole 0.8 g 2-mercaptobenzo Thiosol 0.8 g Trichloroethylene 400 g Next, a 20 μm-thick polypropylene film was superposed on the surface of the photocurable photosensitive layer, passed through a rubber roller and laminated at room temperature to prepare a photosensitive sheet.

When the UV-visible absorption spectrum of this photosensitive sheet was measured by a known method, the transmittance at around 365 nm was almost zero.
Met.

Next, another release layer solution below was applied onto another polyethylene terephthalate film with a thickness of 75 μm to a thickness of 0.5 μm, and the colorant layer dispersion was applied onto the polyethylene terephthalate film to a thickness of 2 μm, and then laminated and dried. Then, four colorant-added materials of black, cyan, magenta, and yellow were prepared.

<Release layer solution> Toresin F-30 (alcohol-soluble nylon, manufactured by Toray)
10g Methanol 90g <Colorant layer dispersion> Copolymerized condensation resin of phenol, m-, p-mixed cresol and formaldehyde 8g Pigment below * 2g Methyl Cellosolve 90g * Pigment A colored image was formed in the following manner using the photosensitive sheet and the colorant-providing material of four colors obtained as described above.

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.
The photosensitive layer was laminated on the surface of the coated paper by passing it between hot rolls at 5 ° C at a speed of 150 cm / min.

A decomposition positive fill corresponding to black was adhered to the polyethylene terephthalate film surface of this photosensitive layer sheet and exposed to 10 mJ / cm ² with a high pressure mercury lamp. Then, the polyethylene terephthalate film on the surface of the photosensitive layer was peeled off and exposed to the photosensitive layer surface, and the colorant layer surface of the black colorant-providing material was adhered to the surface of the photosensitive layer, and 50 cm / min at room temperature under a pressure of 5 kg / cm ^2. After passing between the nip rolls of the laminator at the speed of, the support of the colorant-provided material was peeled off.

Peeling was easily performed, the colorant layer in the portion in contact with the uncured adhesive region of the photosensitive layer was transferred to the photosensitive layer side, and a black positive image was formed on the coated paper. Further, the colorant layer in the portion in contact with the exposure-cured region of the photosensitive layer does not transfer to the photosensitive layer side,
It remained on the support side of the coloring material-provided material.

Next, in the same manner as the above-mentioned operation, another photosensitive sheet is laminated on the coated paper on which a black positive image is formed, image exposure by a decomposition positive film corresponding to Zion, and peeling of the polyethylene terephthalate film, The colorant layer surface of the cyan colorant-providing 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 a black positive image was formed by the same operation.

In the same manner, magenta and yellow color images were formed, and a multicolor image was obtained on the coated paper.

The obtained multicolor image was a good image very close to the image of the printed matter.

Next, another photosensitive sheet is laminated on another coated paper in the same manner, and then exposed with a mask film having 25 1 cm × 1 cm solid patches as shown in FIG. An image was formed on the coated paper by.

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

(Comparative Example 1) A photosensitive sheet similar to that of Example 1 was prepared, a photosensitive layer was laminated on coated paper by the same operation as in Example 1, and then an image was formed using the mask film shown in FIG. Exposure was performed and the polyethylene terephthalate film was peeled off. Next, carbon black (Mitsubishi Carbon Black MA-100, manufactured by Mitsubishi Kasei Co., Ltd.) was applied on the exposed photosensitive layer surface.
To give a black powder obtained by mixing 1: 1 black particles and cellulose acetate particles dispersed in cellulose acetate, lightly rub the photosensitive layer surface using a cotton pad,
When the excess black powder was removed, the black powder adhered only to the unexposed and uncured portion of the photosensitive layer surface, and 25 black solid patches were reproduced on the coated paper. The reflection densitometer, Macbeth RD-51, was used to measure the reflection densities of 25 reproduced solid black patches.
When measured with 4 (using a visual filter),
The measured value is not constant, the highest concentration is 2.05, the lowest concentration is 1.
There was a large variation of 40.

Further, during the image forming operation, it was confirmed that fine particles of black powder were scattered in the air.

(Example 2) Except for changing the releasing layer solution of the coloring agent-applied material and the coloring material layer dispersion liquid to have the following composition, the same operation as in Example 1 was performed to form a multicolor image on the coated paper. Obtained. The obtained multicolor image was a good image very close to the image of the printed matter.

<Release layer solution> CM-8000 (alcohol-soluble nylon, manufactured by Toray) 10g Methanol 90g <Colorant layer dispersion> Hydroxyphenylmethacryto-acrylonitrile-methylmethacrylate-maleic acid copolymer (30:40:
25: 5) 8g Pigment below * 2g Methyl Cellosolve 90g * Pigment Black; Mitsubishi Carbon Black MA-100 (manufactured by Mitsubishi Kasei Co.) Cyan; Lionol Blue NCB (manufactured by Toyo Ink Co., Ltd.) Magenta; BN (Dainippon Ink Co., Ltd.) Yellow; Rionol Yellow GR (Toyo Ink Co., Ltd.)
As described above, according to the image forming method of the present invention, the image forming work is simple, stable and uniform colored image quality is obtained, and further, the human body by inhaling dust is used. It has the advantage that there is no adverse effect on.

[Brief description of drawings]

1 to 4 are sectional views showing the image forming method of the present invention in the order of steps, and FIG. 5 is a plan view of a mask film used in Examples. A ... Photosensitive sheet, B ... Colorant-added material 1 ... Protective sheet, 2 ... Photocurable photosensitive layer 3 ... Transparent sheet, 4 ... Image receiving material 5 ... Colorant layer, 6 ... Support 7 …… Release layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kunio Shimizu, 1st Sakura-cho, Hino City, Konishi Roku Photo Industry Co., Ltd. (72) Hiroshi Ide, 2-5-2, Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Kasei Kogyo Co., Ltd. (72) Inventor Shinya Mayama 2-5-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Kasei Co., Ltd. (56) Reference JP 62-288820 (JP, A) JP 63-147164 (JP) , A) JP-A-63-18347 (JP, A)

Claims (1)

(57) [Claims] 1. A photocurable photosensitive layer, which has adhesiveness at room temperature and whose imagewise exposure causes photocuring in exposed areas to lose adhesiveness and unexposed areas in which adhesiveness does not disappear, protects the transparent sheet. A photosensitive sheet having a structure laminated between the sheet and a colorant-provided material in which a colorant layer containing a colorant and a polymer binder is formed on the releasable surface of a support, Using a material, the protective layer is removed and the exposed photosensitive layer is laminated so as to be in contact with another image-receiving material and adhered, and the transparent sheet is imagewise exposed with an actinic ray, and the transparent sheet is peeled off. Then, the entire photosensitive layer including all exposed and cured regions and unexposed and uncured regions is left on the image receiving material, and the photosensitive layer surface and the colorant layer surface of the colorant-providing material are brought into close contact with each other, and The support of the coloring agent-provided material was peeled off together with the release layer, and Image forming method characterized in that only by transition portion corresponding to the unexposed uncured areas of the adhesive layer to visualize the image.