JPH0619574B2 - Transfer image forming method - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an image forming method using a light-sensitive material having a light-sensitive layer containing a silver halide, a reducing agent, a polymerizable compound, and a color image-forming substance on a support. Concerning

BACKGROUND OF THE INVENTION An image forming method using a light-sensitive material having a light-sensitive layer containing a silver halide, a reducing agent and a polymerizable compound on a support is described in JP-B-45-11149 and 47-20741.
No. 49-10697, JP-A-57-138632.
No. 58-169143.
In these methods, when the exposed silver halide is developed using a developing solution, the reducing agent is oxidized and at the same time, the coexisting polymerizable compound (eg, vinyl compound) initiates the polymerization, resulting in high image quality. It forms a molecular compound. Therefore, the above method requires a developing treatment using a liquid, and the treatment requires a relatively long time.

The present inventors attempted to improve the above method and invented a method capable of forming a polymer compound by a dry treatment, and the present invention has been applied for a patent (Japanese Patent Application No. 59-1913).
53). This method uses a photosensitive silver salt (silver halide),
A recording material (photosensitive material) obtained by carrying a photosensitive layer comprising a reducing agent, a crosslinkable compound (polymerizable compound) and a binder on a support is imagewise exposed to form a latent image, and then heated. In the area where the latent image of the photosensitive silver salt is formed,
It forms a polymer compound.

The image forming method is a method of polymerizing the polymerizable compound in the portion where the latent image of silver halide is formed. The present inventors further invented a method capable of polymerizing a polymerizable compound in a portion where a latent image of silver halide is not formed,
A patent application for this invention has already been filed (Japanese Patent Application No. 60-21).
No. 0657). In this method, by heating, a reducing agent acts on the portion where the latent image of silver halide is formed to suppress the polymerization of the polymerizable compound, and at the same time, promotes the polymerization of other portions.

As one aspect of the image forming method as described above, a light-sensitive material having a light-sensitive layer containing a silver halide, a reducing agent, a polymerizable compound, and a color-forming agent on a support is formed at the same time as image-wise exposure, or After the exposure, a developing treatment is carried out to polymerize and cure the polymerizable compound, thereby immobilizing the color-developing agent in the cured portion, and the image-receiving material containing the developer is superposed on the developed photosensitive material. There is a method in which the color-forming agent in the uncured portion is transferred to the image-receiving material by pressurizing with, and the color-forming agent is colored to obtain an image on the image-receiving material.

SUMMARY OF THE INVENTION The object of the present invention is to use plain paper, coated paper,
An object of the present invention is to provide an image forming method capable of using an ordinary sheet material such as a plastic film.

In the present invention, a light-sensitive material having a light-sensitive layer containing a silver halide, a reducing agent, a polymerizable compound and a dye or a pigment on a support is imagewise exposed to form a latent image of silver halide. At the same time as the exposure or after the imagewise exposure,
A heat development treatment is performed by heating at 1 to 200 ° C. for 1 second to 5 minutes, thereby curing the polymerizable compound in the area where the latent image is formed, immobilizing the dye or pigment in the cured area, and performing the heat development. The transfer image forming method is characterized in that the dye or pigment in the uncured portion is transferred to the image receiving material by pressurizing the image receiving material in a state of being superposed on the processed photosensitive material.

Further, the present invention provides a support, a silver halide, a reducing agent,
A light-sensitive material having a light-sensitive layer containing a polymerizable compound and a dye or a pigment is imagewise exposed to form a latent image of silver halide.
To 200 ° C. for 1 second to 5 minutes to perform heat development treatment, thereby curing the polymerizable compound in the area where the latent image is not formed, immobilizing the dye or pigment in the cured area, and heat development treatment. There is also provided a transfer image forming method characterized in that the dye or pigment in the uncured portion is transferred to the image receiving material by applying pressure in the state where the image receiving material is superposed on the photosensitive material subjected to the above step.

[Advantages of the Invention] The image forming method of the present invention is characterized in that a photosensitive material having a photosensitive layer containing a dye or a pigment is used to transfer the dye or pigment to an image receiving material to obtain an image.

Since the dye or pigment is a substance that has already developed color, it is not necessary to include a developer in the image receiving material. Therefore,
In the image forming method of the present invention, plain paper, coated paper,
A commercially available sheet material such as a plastic film can be used as the image receiving material. That is, the image forming method of the present invention has an effect that if the dye or pigment can be transferred as the image receiving material, a material that is inexpensive and has excellent storability with time can be used if necessary. .

[Detailed Description of the Invention] The dyes and pigments that can be used in the image forming method of the present invention are not particularly limited, and various kinds of compounds can be used.

As the dye, it is preferable to use a dye that dissolves in the polymerizable compound used at 1% by weight or more at room temperature. However,
A dye having a low solubility in a polymerizable compound can also be used by using an auxiliary solvent which can sufficiently dissolve the dye.

Examples of dyes that can be used in the image forming method of the present invention include azo dyes, cyanine dyes, oxonol dyes, merocyanine dyes, styrylanthraquinone dyes, triphenylmethane dyes, azomethine dyes,
Indoaniline dye, benzylidene dye, stilbene dye, anthraquinone dye, thiazole dye,
Examples thereof include dioxazine dyes.

The above dyes are described, for example, in "Dye Handbook" (edited by the Society of Organic Synthetic Chemistry, published in 1945).

The pigment that can be used in the image forming method of the present invention is an organic pigment if it is a colored or white powder that is insoluble in water and oily substances (for example, the polymerizable compound used in the present invention). Alternatively, it may be an inorganic pigment. The particle size of the pigment is preferably in the range of 0.01 to 10 μm, more preferably 0.1 to 1 μm. It should be noted that the use of the above pigment has an advantage that the storage stability (weather resistance to heat, light, moisture, air oxidation, etc.) of the obtained image is excellent as compared with the case where the above-mentioned dye is used.

Examples of pigments that can be used in the image forming method of the present invention include inorganic pigments such as emerald green, cadmium red, cadmium yellow, and carbon black.
Ultramarine, chrome vermillion, cobalt blue, cobalt green, cobalt violet, chromium oxide, vermilion (H
gS), strontium yellow, cerulean blue,
Colored pigments such as red iron oxide (Fe ₂ O ₃ ) and white pigments such as titanium dioxide, zinc oxide and barium sulfate can be mentioned.

Examples of organic pigments include toluidine maroon, permanent red AG, Hansa yellow G, pyrazolone red, fast sky blue, phthalocyanine (metal free), phthalocyanine green, phthalocyanine blue, brilliant carmine 6B, brilliant scarlet G, benzidine yellow, benzidine orange. Two
G, methyl violet lake, etc. can be mentioned.

Regarding each of the above-mentioned pigments, for example, "Handbook of New Color Chemistry" (edited by the Japan Color Society, Tokyo University Press, 198)
Pp. 691 to 696, etc., published 0 years ago.

As the dyes and pigments, the substances described above may be used alone or in combination of several kinds. In addition,
When using a plurality of the above dyes or pigments, use them in combination with at least three types of silver halide emulsions that have photosensitivity in mutually different spectral regions (the silver halide emulsion will be described later) so as to correspond to each emulsion. By doing so, a color image can be easily formed. For example, when a combination of a blue-sensitive emulsion, a green-sensitive emulsion and a red-sensitive emulsion is used, the blue-sensitive emulsion is linked with a yellow dye or pigment, the green-sensitive emulsion is linked with a magenta dye or pigment, and the red-sensitive emulsion is cyan. It may be configured so as to interlock with a dye or a pigment.

In the image forming method of the present invention, the dye or pigment is preferably used in the range of 0.5 to 50% by weight of the polymerizable compound used, and more preferably 3 to 20% by weight. .

As described above, the image receiving material used in the image forming method of the present invention can be composed of various kinds of materials including commercially available products. Examples of the image receiving material that can be used in the present invention include plain paper, high-quality paper, coated paper (eg, paper coated with gelatin, carboxymethylcellulose, etc.),
Examples thereof include a plastic film (eg PET film), a polymer-coated plastic film, and a wooden board. When a coat layer is provided on paper or plastic, the thickness of the coat layer is 0.1.
To 100 μm, and more preferably 0.5 to 3 μm. The thickness of the image receiving material is not particularly limited. Further, the image forming method of the present invention can be carried out as long as the image receiving material has a shape having a substantially flat transfer surface other than the sheet-like material. When a white substance is used as the dye or pigment, it is preferable to use a colored material as the image receiving material.

Instead of using the image-receiving material independently, the above-mentioned image-receiving material may be provided as an arbitrary layer (image-receiving layer) of a photosensitive material described later on a support common to the photosensitive layer. In the present specification, the "image receiving material" also includes an image receiving layer provided on the photosensitive material. When the image receiving layer is located on the surface of the photosensitive material, it is preferable to further provide a protective layer.

The imagewise exposure of the light-sensitive material, the development treatment, and the transfer of the dye or pigment to the image-receiving material in the image forming method of the present invention will be sequentially described below.

As the exposure method in imagewise exposure, various exposure means can be used, but generally, a latent image of silver halide is obtained by imagewise exposure of radiation including visible light. The type of light source and the amount of exposure can be selected according to the photosensitive wavelength of silver halide (wavelength sensitized when dye sensitization is performed) and sensitivity. The original image may be a monochrome image or a color image.

In the dry image forming method of the present invention, development processing by heating is performed. Since the development processing by heating is a dry processing, it has the advantages that the operation is simple and the processing can be carried out in a short time.

As the heating method, various conventionally known methods can be used. Further, like the light-sensitive material described in Japanese Patent Application No. 60-135568, the light-sensitive material may be provided with a heating element layer and used as a heating means. The heating temperature is generally 80 ° C to 200 ° C, preferably 100 ° C to 160 ° C.
Is. The heating time is generally 1 second to 5 minutes, preferably 5 seconds to 1 minute.

The image forming method of the present invention, as described above, is subjected to a development treatment to polymerize and cure the polymerizable compound in a portion where a latent image of silver halide is formed or a portion where a latent image of silver halide is not formed, This immobilizes the dye or pigment in the cured area. In the image forming method of the present invention, the polymerizable compound in the portion where the latent image of silver halide is formed is generally polymerized and hardened in the above-mentioned development processing, but as described above, the specification of Japanese Patent Application No. 60-210657. And a reduction method using a light-sensitive material having a light-sensitive layer containing a silver halide, a reducing agent, a polymerizable compound, a thermal polymerization initiator, and a dye or a pigment on a support, as in the method using a light-sensitive material described in It is also possible to polymerize and cure the part of the polymerizable compound in which the latent image of silver halide is not formed by adjusting the amount of the agent and the like.

The dye or pigment in the uncured portion is transferred to the image receiving material by applying pressure while the image receiving material is superposed on the photosensitive material which has been developed as described above. Various conventionally known methods can be used for the pressing means. The image receiving material used is as described above. When paper is used as the image receiving material, the transfer efficiency can be improved and the density of the obtained image can be increased by using the paper while being wet with water. In this way, the image forming method of the present invention can easily obtain an image.

After the image formation as described above, the applicant of the present invention
As in the method described in the specification of “Image forming method and photosensitive material” filed on Jan. 10, 1 (2), a photopolymerization initiator was used to transfer a dye or a pigment onto an image receiving material. A polymerizable compound for polymerization may be polymerized and cured.

INDUSTRIAL APPLICABILITY The image forming method of the present invention can be applied to many fields such as black and white or color photographing and printing, printing, printing plate, X-ray photographing, medical diagnosis (for example, ultrasonic diagnostic machine CRT photographing), computer graphic hard copy, and copying machine. Can be applied.

Photosensitive materials that can be used in the image forming method of the present invention are described below.

The light-sensitive material used in the image forming method of the present invention comprises a support and a light-sensitive layer containing a silver halide, a reducing agent, a polymerizable compound, and a dye or a pigment.

As the silver halide in the present invention, a silver halide known in the photographic art can be used. The light-sensitive material that can be used in the present invention includes silver chloride, silver bromide,
Any of silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, and silver chloroiodobromide can be used. The halogen composition of the silver halide grains may be uniform or non-uniform on the surface and inside. In the present invention, the grain size of silver halide grains is such that the average grain size is 0.001 μm to 10 μm.
Those having a thickness of 0.001 μm to 5 μm are particularly preferable. Two or more kinds of silver halides having different crystal habits, halogen compositions, grain sizes and the like can be used in combination. The amount of the silver halide contained in the photosensitive layer is preferably in the range of 1 mg to 10 g / m ^{2 in} terms of silver containing an organic silver salt which is an optional component described later.

The reducing agent that can be used in the image forming method of the present invention has a function of reducing silver halide and / or a function of accelerating (or suppressing) the polymerization of the polymerizable compound.
There are various kinds of substances as the reducing agent having the above function. Examples of the reducing agent include hydroquinones, catechols, p-aminophenols, p-phenylenediamines, 3-pyrazolidones, 3-aminopyrazoles, 4
-Amino-5-virazolones, 5-aminouracils,
4,5-Dihydroxy-6-aminopyrimidines, reductones, aminoreductones, o- or p-sulfonamidophenols, o- or p-sulfonamidonaphthols, 2-sulfonamidoindanones, 4-
Sulfonamide-5-pyrazolones, 3-sulfonamidoindoles, sulfonamide pyrazolobenzimidazoles, sulfonamide pyrazolotriazoles, α
-Sulfonamide ketones, hydrazines, etc.

Regarding various reducing agents having the above functions, Japanese Patent Application Nos. 60-22980, 60-29894 and 60-
68874, 60-226084, 60-22
No. 7527 and No. 60-227528. Regarding the reducing agent, "The Theory of the Photographic Process" 4th edition by T. James,
291-334 (1977), Research Disclosure Vol. 170, June 170, No. 17029 (pages 9-15), and Vol. 176, December 1978, No. 17643 (22-31). Page). Also in the image forming method of the present invention, the reducing agents (including those described as a developing agent or a hydrazine derivative) described in the above specifications and references can be effectively used. Therefore, the “reducing agent” in the present specification includes the reducing agents described in the above respective specifications and documents.

These reducing agents may be used alone or as a mixture of two or more reducing agents as described in the above specification. When two or more reducing agents are used in combination, the reducing agents interact as follows: first, to promote reduction of silver halide (and / or organic silver salt) by so-called superaddition; , Causes polymerization of the polymerizable compound via an oxidation-reduction reaction with another reducing agent in which an oxidized form of the first reducing agent produced by reduction of silver halide (and / or organic silver salt) coexists (or ,
It may be possible to suppress the polymerization of the polymerized compound).
However, in actual use, it is difficult to specify which of the above actions because the above reactions can occur simultaneously.

Specific examples of the reducing agent include pentadecylhydroquinone, 5-t-butylcatechol, p- (N, N-diethylamino) phenol, 1-phenyl-4-methyl-
4-hydroxymethyl-3-pyrazolidone, 1-phenyl-4-methyl-4-heptadecylcarbonyloxymethyl-3-pyrazolidone, 2- (N-phenylsulfamoyl) -4-hexadodecyloxy-5-octylphenol, 2- (N-phenylsulfamoyl) -4-
t-butyl-5-hexadodecyloxyphenol, 2
-(N-butylcarbamoyl) -4- (N-phenylsulfamoyl) naphthol, 2- (N-methyl-N-octadecylcarbamoyl) -4- (N-phenylsulfamoyl) naphthol, 1-acetyl-2 -Phenylhydrazine, 1-acetyl-2-{(p or o) -aminophenyl} hydrazine, 1-formyl-2-{(p or o) -aminophenyl} hydrazine, 1-acetyl-2-{(p or o) -methoxyphenyl} hydrazine, 1-lauroyl-2-{(p or o) -aminophenyl} hydrazine, 1-trityl-2- (2,6-dichloro-4-cyanophenyl) hydrazine, 1-trityl- 2-phenylhydrazine, 1-phenyl-2-
(2,4,6-trichlorophenyl) hydrazine, 1-
{2- (2,5-di-t-pentylphenoxy) butyroyl} -2-{(p or o) -aminophenyl} hydrazine, 1- {2- (2,5-di-t-pentylphenoxy) butyroyl } -2-{(p or o) -aminophenyl} hydrazine pentadecyl fluorocaprylate, 3-indazolinone, 1- (3,5-dichlorobenzoyl) -2-phenylhydrazine, 1-trityl-2
-[{2-N-butyl-N-octylsulfamoyl)
-4-Methanesulfonyl} phenyl] hydrazine, 1-
{4- (2,5-di-t-pentylphenoxy) butyroyl} -2-{(p or o) -methoxyphenyl} hydrazine, 1- (methoxycarbonylbenzohydryl)
-2-Phenylhydrazine, 1-formyl-2- [4-
{2- (2,4-di-t-pentylphenoxy) butylamido} phenyl] hydrazine, 1-acetyl-2-
[4- {2- (2,4-di-t-pentylphenoxy)
Butylamido} phenyl] hydrazine, 1-trityl-
2-[{2,6-dichloro-4- (N, N-di-2-ethylhexyl) carbamoyl} phenyl] hydrazine,
1- (methoxycarbonylbenzohydryl) -2-
(2,4-dichlorophenyl) hydrazine, and 1-
Examples thereof include trityl-2-[{2- (N-ethyl-N-octylsulfamoyl) -4-methanesulfonyl} phenyl] hydrazine.

In the image forming method of the present invention, the reducing agent may be used in the range of 0.1 to 1500 mol% with respect to 1 mol of silver (including the above-described silver halide and an organic silver salt which is an optional component). preferable.

The polymerizable compound that can be used in the image forming method of the present invention is not particularly limited, and known polymerizable compounds can be used. However, in the image forming method of the present invention, when the development treatment by heating is planned, it is preferable to use a compound having a high boiling point (for example, a boiling point of 80 ° C. or higher) which is less likely to volatilize during heating. Further, the image forming method of the present invention is intended to immobilize the dye or pigment by polymerizing and curing the polymerizable compound, and therefore the polymerizable compound is a crosslinkable compound having a plurality of polymerizable functional groups in the molecule. Preferably there is.

The polymerizable compound used in the image forming method is generally a compound having addition polymerization or ring-opening polymerization. The compound having an addition-polymerizable group includes a compound having an ethylenically unsaturated group, and the compound having a ring-opening polymerizable group includes a compound having an epoxy group. A compound having an ethylenically unsaturated group is particularly preferable.

Examples of the compound having an ethylenically unsaturated group which can be used in the image forming method of the present invention include acrylic acid and salts thereof, acrylic acid esters, acrylamides, methacrylic acid and salts thereof, methacrylic acid esters and methacrylamide. , Maleic anhydride, maleic acid esters, itaconic acid esters, styrenes, vinyl ethers, vinyl esters, N-vinyl heterocycles, allyl ethers, allyl esters and their derivatives.

Specific examples of the polymerizable compound that can be used in the present invention include acrylic acid esters such as n-butyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, benzyl acrylate, furfuryl acrylate, ethoxyethoxyethyl acrylate, dicyclohexyloxy. Ethyl acrylate, nonylphenyloxyethyl acrylate, hexanediol diacrylate, butanediol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate,
Examples thereof include polyoxyethylenated bispheninol A diacrylate, hydroxypolyether polyacrylate, polyester acrylate and polyurethane acrylate.

Other specific examples of methacrylic acid esters include methyl methacrylate, butyl methacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol trimethacrylate, and pentaerythritol tetramethacrylate. Methacrylate and dimethacrylate of polyoxyalkylenated bisphenol A and the like can be mentioned.

The polymerizable compounds may be used alone or in combination of two or more. It should be noted that a substance in which a polymerizable functional group such as a vinyl group or a vinylidene group is introduced into the chemical structure of the dye, pigment or reducing agent described above can also be used as the polymerizable compound of the present invention. Needless to say, the use of a substance that serves as a dye and a polymerizable compound, a pigment and a polymerizable compound, or a reducing agent and a polymerizable compound as described above is also included in the embodiment of the present invention.

In the image forming method of the present invention, the polymerizable compound is preferably used in the range of 0.05 to 1200% by weight based on silver halide. More preferable range of use is 5
To 950% by weight.

The polymerizable compound that can be used in the image forming method is described in the application specifications relating to the series of image forming methods and photosensitive materials described above and below.

The light-sensitive material used in the image forming method of the present invention comprises a support and a light-sensitive layer containing the above-described silver halide, a reducing agent and a polymerizable compound. The support is not particularly limited, but when the development processing by heating is planned in the image forming method of the present invention, it is preferable to use a material that can withstand this processing temperature. Examples of materials that can be used for the support include glass, paper, high-quality paper, coated paper, cast coated paper, synthetic paper, metal and its analogs, polyester, acetyl cellulose, cellulose ester, polyvinyl acetal, polystyrene, polycarbonate, polyethylene. Examples thereof include films such as terephthalate, and paper laminated with a resin material or a polymer such as polyethylene.

The photosensitive material used in the image forming method of the present invention has a polymerizable compound dispersed in the photosensitive layer in the form of oil droplets, and at least silver halide and a dye or pigment are polymerizable among components contained in the photosensitive layer. It is preferably present in the oil droplets of the compound. Other components in the photosensitive layer, such as a reducing agent, may be contained in the oil droplets. Japanese Patent Application No. 60-1170 discloses an example of a photosensitive material in which the above-mentioned polymerizable compound is dispersed in the photosensitive layer in the form of oil droplets and an image forming method using the same.
89.

The oil droplets of the polymerizable compound are more preferably in the form of microcapsules. There are no particular restrictions on the microencapsulation method, and various known techniques can be applied. For an example of a light-sensitive material using microcapsules and an image forming method using the same, Japanese Patent Application No. 60-
It is described in the specification of 117089.

As an example of the above-mentioned known technique, US Pat.
US Pat. No. 3,287,154 and British Patent No. 990443, and Japanese Patent Publication Nos. 38-19574 and 42. −
U.S. Pat. No. 3,418,250 and U.S. Pat. No. 3,603,603;
No. 04, a method by precipitation of the polymer described in US Pat. No. 4,967,691; isocyanates described in US Pat. No. 3,796,669.
Method using polyol wall material; US Pat. No. 39145.
A method using the isocyanate wall material described in No. 11; US Pat. Nos. 4,001,140 and 4,087,376.
Urea-formaldehyde-based or urea formaldehyde-resorcinol-based wall forming materials described in U.S. Pat.
Method using a wall forming material such as melamine-formaldehyde resin and hydroxypropyl cellulose described in Japanese Patent No. 25455; JP-B-36-9168 and JP-A-51-51168.
-9079 in sit by polymerization of monomers
u method; British Patent Nos. 927807 and 96507
No. 4, polymerization dispersion cooling method; US Pat. No. 311
1407 and British Patent No. 930422, the spray drying method etc. which are described can be mentioned. The microencapsulation method is not limited to the above, but a method of emulsifying the core substance and then forming a polymer film as the microcapsule wall is particularly preferable.

Optional components that can be contained in the photosensitive layer of the photosensitive material include sensitizing dyes, organic silver salts, various image forming accelerators (eg, bases or base precursors, oils, surfactants, antifoggants, and thermal solvents). Etc.), thermal polymerization inhibitor, thermal polymerization initiator, development terminator, fluorescent whitening agent, anti-fading agent, halation or irradiation prevention dye, matting agent,
Anti-smudge agents, plasticizers, water release agents, binders, etc.

For examples of sensitizing dyes that can be used in the image forming method and the light-sensitive material, see Japanese Patent Application No. 60-139746.
Japanese Patent Application No. 60-14 for examples of organic silver salts.
1799, respectively. The image forming method and the light-sensitive material using a base or a base precursor are described in Japanese Patent Application No. 227528/1985, and the image forming method and the light-sensitive material using a thermal polymerization initiator are described in Japanese Patent Application No. Each of them is described in the specification of No. 223347. Further, regarding a light-sensitive material using an antifoggant, Japanese Patent Application No. 60-294337,
Nos. 60-294338, 60-294339 and 60-294341, and Japanese Patent Application No. 60-294340 describes a light-sensitive material using a polyethylene glycol derivative as a heat solvent. is there. For the examples of other components and the usage thereof, the specification of the application relating to the series of photosensitive materials described above,
And Research Disclosure Magazine Vol.170,197
No. 17029 (pages 9 to 15), June 1996.

The sensitizing dye that can be used in the image forming method of the present invention is not particularly limited, and a silver halide sensitizing dye known in the photographic art and the like can be used. The sensitizing dye, methine dye, cyanine dye, merocyanine dye,
It includes complex cyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes, hemioxonol dyes and the like. These sensitizing dyes may be used alone or in combination. In particular, for the purpose of supersensitization, it is common to use a combination of sensitizing dyes. Further, together with the sensitizing dye, a dye which does not have a spectral sensitizing effect itself, or a substance which does not substantially absorb visible light but exhibits supersensitization may be used together. The addition amount of the sensitizing dye is generally 10 ^-8 per mol of silver halide.
To about 10 ^-2 mol.

In the image forming method of the present invention, the use of an organic silver salt is particularly effective when development processing by heating is planned. That is, when heated to a temperature of 80 ° C. or higher, the organic silver salt is considered to participate in the redox reaction using the latent image of silver halide as a catalyst. In this case, it is preferable that the silver halide and the organic silver salt are in contact with or in close proximity to each other. Examples of the organic compound that constitutes the organic silver salt include an aliphatic or aromatic carboxylic acid, a thiocarbonyl group-containing compound having a mercapto group or α-hydrogen, and an imino group-containing compound. Among them, benzotriazole is particularly preferable. The above organic silver salt is generally used in an amount of 0.01 to 10 mol, preferably 0.01 to 1 mol, per mol of silver halide. The same effect can be obtained by adding an organic compound (for example, benzotriazole) constituting the organic silver salt to the photosensitive layer instead of the organic silver salt.

Various image formation accelerators can be used in the image forming method of the present invention. As the image forming accelerator, promotion of redox reaction between silver halide (and / or organic silver salt) and reducing agent and redox agent, promotion of transfer of dye or pigment from photosensitive material to image receiving material or image receiving layer There are functions such as.
The image forming accelerator is classified into a base or a base precursor, an oil, a surfactant, an antifoggant, a thermal solvent and the like from the viewpoint of physicochemical function. However, these substance groups generally have a composite function, and usually have some of the above-mentioned accelerating effects together. Therefore, the above classification is convenient, and in reality, one compound often has a plurality of functions.

Examples of image forming accelerators include bases, base precursors, oils, surfactants, antifoggants, and hot solvents.

Examples of preferable bases include alkali metal or alkaline earth metal hydroxides, secondary or tertiary phosphates, borates, carbonates, quinolinates, metaborates as inorganic bases; ammonium hydroxide. Compounds; quaternary alkylammonium hydroxides; hydroxides of other metals, etc., and organic bases include aliphatic amines (trialkylamines, hydroxylamines, aliphatic polyamines), aromatics Amines (N-alkyl-substituted aromatic amines, N-hydroxylalkyl-substituted aromatic amines and bis [p- (dialkylamino) phenyl] methanes), heterocyclic amines, amidines, cyclic amidines, guanidines , Cyclic guanidines are preferable, and those having a pKa of 7 or more are particularly preferable.

Examples of the base precursor include salts of organic acids and bases that are decarboxylated by heating, compounds that release amines by reactions such as intramolecular nucleophilic substitution reaction, Rossen rearrangement, Beckmann rearrangement, etc. Compounds that release and generate a base by electrolysis are preferably used. Specific examples of the base precursor include guanidine trichloroacetic acid, piperidine trichloroacetic acid, morpholine trichloroacetic acid, p-toluidine trichloroacetic acid, 2-picoline trichloroacetic acid, phenylsulfonylacetic acid guanidine, 4-chlorophenylsulfonylacetic acid guanidine, and 4-methyl-. Examples thereof include guanidine sulfonylphenylsulfonylacetate and guanidine 4-acetylaminophenylpropionate.

In the image forming method of the present invention, the base or base precursor can be used in a wide range of amount. The base or base precursor is 5 in terms of weight of the coating film of the photosensitive layer.
It is suitable to use 0% by weight or less, more preferably 0.01% by weight to 40% by weight. In the present invention, the base and / or the base precursor may be used alone or as a mixture of two or more kinds.

As the oil, a high boiling point organic solvent used as a solvent for emulsifying and dispersing a hydrophobic compound can be used.

Examples of the surfactant include pyridinium salts, ammonium salts, phosphonium salts described in JP-A-59-74547 and polyalkylene oxides described in JP-A-59-57231.

Examples of the antifoggant include compounds having a 5- or 6-membered nitrogen-containing heterocyclic structure (including compounds having a cyclic amide structure), thiourea derivatives, thioether compounds, thiol derivatives, etc., which are known in the conventional photographic art. Can be mentioned.

As the hot solvent, a compound which can be a solvent for the reducing agent, a compound which is a substance having a high dielectric constant and is known to accelerate the physical development of the silver salt, and the like are useful. As a useful thermal solvent,
Polyethylene glycols described in U.S. Pat. No. 3,347,675, derivatives of polyethylene oxide such as oleic acid ester, beeswax, monostearin and -SO.
High dielectric constant compounds having _2- and / or -CO- groups, polar substances described in U.S. Pat. No. 3,667,959, 1,10-decane described in Research Disclosure, December 1976, pages 26-28. Diol, methyl anisate, biphenyl suberate and the like are preferably used.

The thermal polymerization initiator that can be used in the image forming method of the present invention is a compound that generally undergoes thermal decomposition under heating to generate a polymerization initiation species (particularly a radical), and is usually used as a radical polymerization initiator. Is. Regarding the thermal polymerization initiator, pages 6 to 1 of “Additional Polymerization / Ring-Opening Polymerization”, edited by Editorial Committee of Polymer Society for Polymer Science, 1983, Kyoritsu Shuppan)
It is described on page 8 and the like. Specific examples of the thermal polymerization initiator include azobisisobutyronitrile, 1,1′-azobis (1-cyclohexanecarbonitrile), dimethyl-
Azo compounds such as 2,2′-azobisisobutyrate, 2,2-azobis (2-methylbutyronitrile) and azobisdimethylvaleronitrile, benzoyl peroxide, di-t
-Organic peroxides such as peroxide, dicumyl peroxide, t-butylhydroperoxide, cumene hydroperoxide, inorganic peroxides such as hydrogen peroxide, potassium persulfate, ammonium persulfate, and p-toluenesulfinic acid Examples thereof include sodium. By using the thermal polymerization initiator as described above and adjusting the type, amount, etc. of the reducing agent, it is possible to remove the latent image of silver halide or the portion where the latent image is not formed. It is also possible to polymerize the polymerizable compound. In the system using the thermal polymerization initiator, it is particularly preferable to use the 1-phenyl-3-pyrazolidone derivative as the reducing agent described above. The thermal polymerization initiator is preferably used in the range of 0.1 to 120% by weight, more preferably 1 to 10% by weight, based on the polymerizable compound.

The development terminator which can be used in the image forming method of the present invention is a compound or silver and a silver salt which, after proper development, rapidly neutralize or react with a base to lower the concentration of the base in the film and stop the development. It is a compound that interacts with and suppresses development. Specific examples thereof include an acid precursor that releases an acid when heated, an electrophilic compound that causes a substitution reaction with a coexisting base when heated, a nitrogen-containing heterocyclic compound, and a mercapto compound. Examples of acid precursors include oxime esters described in Japanese Patent Application Nos. 58-216928 and 59-48305, and Japanese Patent Application No. 59-8583.
Examples thereof include compounds releasing an acid by Rossen rearrangement described in No. 4, and examples of electrophilic compounds that cause a substitution reaction with a base by heating include compounds described in Japanese Patent Application No. 59-85836. .

The anti-smudge agent used in the image forming method of the present invention is preferably solid particles at room temperature. Specific examples thereof include starch particles described in British Patent No. 12322347, polymer fine powder described in US Pat. No. 3,625,736, etc., and microcapsule particles containing no color former described in British Patent No. 12359991. Examples thereof include cellulose fine powders described in US Pat. No. 2,711,375, talc, kaolin, bentonite, pyrophyllite, zinc oxide, titanium oxide, and inorganic particles such as alumina. The average particle size of the particles is preferably in the range of 3 to 50 μm in volume average diameter, and more preferably in the range of 5 to 40 μm. As described above, when the oil droplets of the polymerizable compound are in the microcapsule state, it is more effective that the particles are larger than the microcapsules.

The binder that can be used in the light-sensitive material used in the image forming method of the present invention can be contained in the light-sensitive layer alone or in combination. It is preferable to mainly use a hydrophilic binder. As the hydrophilic binder, a transparent or translucent hydrophilic binder is typical, and examples thereof include proteins such as gelatin, gelatin derivatives, and cellulose derivatives, natural substances such as starch and polysaccharides such as arabic gum, polyvinyl alcohol, and polyvinyl alcohol. Includes synthetic polymeric materials such as water soluble polyvinyl compounds such as pyrrolidone, acrylamide polymers. Other synthetic polymeric materials include dispersed vinyl compounds in the form of latices, which increase the dimensional stability of photographic materials in particular.

Examples of layers that can be optionally provided in the light-sensitive material include an image receiving layer (the image receiving layer has been described above), a heating element layer, a protective layer, an antistatic layer, an anti-curl layer, a peeling layer, a matting agent layer, and the like. be able to.

For the photosensitive material using the heating element layer, Japanese Patent Application No.
-135568. In addition, examples of other auxiliary layers and usage modes thereof are also described in the application specification relating to the series of image forming methods and photosensitive materials described above.

The light-sensitive material used in the image forming method of the present invention can be manufactured as described below.

Although various methods can be used as a method for producing a light-sensitive material, a general production method is to prepare a coating solution by dissolving, emulsifying or dispersing the components of the photosensitive layer in an appropriate solvent, and applying the coating solution. Is applied to a support and dried to obtain a light-sensitive material.

Generally, the coating solution is prepared by preparing a liquid composition containing each component for each component, and then mixing each liquid composition. The liquid composition may be prepared for each component, or may be prepared to contain a plurality of components. A part of the components of the photosensitive layer may be added and used at the stage of preparing the liquid composition or the coating solution or after the preparation. Furthermore, as described below, a method of preparing a secondary composition by emulsifying an oily (or aqueous) composition containing one or more components in an aqueous (or oily) solvent can also be used. .

Hereinafter, a method for preparing a liquid composition and a coating liquid will be described with respect to main components contained in the photosensitive layer.

In the production of a light-sensitive material, silver halide is preferably prepared as a silver halide emulsion. There are various methods known in the photographic art for preparing a halogenated emulsion, but there is no particular limitation regarding the production of the light-sensitive material of the present invention. The silver halide emulsion can be implemented by any of the acidic method, the neutral method and the ammonia method. The reaction mode of the soluble silver salt and the soluble halogen salt may be a one-sided mixing method, a simultaneous mixing method, or a combination thereof. A back-mixing method in which grains are formed under conditions of excess silver ions and a controlled double-jet method in which pAg is kept constant can also be adopted. Further, the silver halide emulsion may be a surface latent image type in which a latent image is mainly formed on the surface of a grain, or an internal latent image type in which a latent image is formed inside the grain. A direct reversal emulsion in which an internal latent image type emulsion and a nucleating agent are combined can also be used.

In the preparation of a silver halide emulsion used for producing a light-sensitive material, it is preferable to use a hydrophilic colloid as a protective colloid. By preparing a silver halide emulsion using a hydrophilic colloid, the sensitivity of a light-sensitive material produced using this emulsion is improved. The silver halide emulsion contains ammonia and an organic thioether derivative as a silver halide solvent in the step of forming silver halide grains (Japanese Examined Patent Publication No.
No. 7-386) and sulfur-containing compounds (Japanese Patent Laid-Open No. Sho 5).
3-144319 gazette) etc. can be used. Further, in the process of grain formation or physical ripening, a cadmium salt, a zinc salt, a lead salt, a thallium salt or the like may be allowed to coexist. Further, for the purpose of improving the high illuminance failure and the low illuminance failure, a water-soluble iridium salt such as iridium chloride (III valence or IV valence), hexachloroiridium ammonium salt, or a water-soluble rhodium salt such as rhodium chloride can be used.

Soluble salts may be removed from the silver halide emulsion after formation of a precipitate or after physical ripening. In this case, it can be carried out according to the Nudel washing method or the sedimentation method. The silver halide emulsion may be used without ripening, but it is usually chemically sensitized before use. In the emulsion for conventional type sensitizers, known sulfur sensitization method, reduction sensitization method, noble metal sensitization method, or the sensitization method using the sensitizing dye described in Japanese Patent Application No. 60-139746 mentioned above may be used alone or It can be used in combination. These chemical sensitizations can be carried out in the presence of a nitrogen-containing heterocyclic compound (see JP-A Nos. 58-126526 and 58-215644).

When the organic silver salt described in Japanese Patent Application No. 60-141799 is contained in the photosensitive layer, the organic silver salt emulsion can be prepared by a method similar to the method for preparing a silver halide emulsion. .

The polymerizable compound can be used as a solvent in preparing a composition of other components in the photosensitive layer in the production of the photosensitive material. For example, a silver halide (including a silver halide emulsion), a reducing agent or the like can be dissolved, emulsified or dispersed in a polymerizable compound and used in the production of a light-sensitive material. When oil droplets of a polymerizable compound are microencapsulated as in the light-sensitive material disclosed in Japanese Patent Application No. 60-117089, a wall material necessary for microencapsulation is added to the polymerizable compound. You can leave it.

The dye or pigment used in the image forming method of the present invention is also preferably used by being included in the polymerizable compound. The dye is used by dissolving it in a polymerizable compound.For a dye having a low solubility in the polymerizable compound, the dye is dissolved in an auxiliary solvent which can dissolve the dye well, and the solution is added to the polymerizable compound. May be. However, the amount of the auxiliary solvent used is preferably 50% by weight or less of the polymerizable compound. The pigment is used by dispersing it in a polymerizable compound.

A photosensitive composition in which silver halide is dispersed in a polymerizable compound can be prepared using a silver halide emulsion.
Further, in the preparation of the photosensitive composition, the silver halide can be used as a dry powder by freeze-drying or the like in addition to the preparation as a silver halide emulsion. The photosensitive composition containing these silver halides can be obtained by stirring with a homogenizer, blender, mixer or other commonly used stirrer.

In addition, in the polymerizable compound used for preparing the photosensitive composition, it is preferable to dissolve a copolymer composed of a hydrophilic repeating unit and a hydrophobic group repeating unit.
The photosensitive composition containing the above copolymer is described in Japanese Patent Application No. 60-261887.

Further, instead of using the above copolymer, microcapsules containing a silver halide emulsion as a core substance may be dispersed in a polymerizable compound to prepare a photosensitive composition. The photosensitive composition containing the microcapsules containing the silver halide emulsion as a core substance is described in the specification of "Photosensitive composition" filed on January 14, 1986 by the present applicant (1). .

The polymerizable compound (including those containing other constituents such as the photosensitive composition) is preferably used as an emulsion emulsified in an aqueous solvent. When oil droplets of the polymerizable compound are microencapsulated as described above, the wall material required for microencapsulation can be added to this emulsion. The treatment for forming the wall surface of the microcapsule is preferably carried out at the stage of this emulsion. A reducing agent or any other component may be added at the stage of the above emulsion.

Among the emulsions of the above-mentioned polymerizable compound, those using a photosensitive composition containing silver halide as the polymerizable compound can be used as they are as a coating solution for a photosensitive material. Emulsions other than the above can be mixed with the composition of other components such as a silver halide emulsion and optionally an organic silver salt emulsion to prepare a coating solution. It is also possible to add other components such as a reducing agent at the stage of the coating liquid, similarly to the above emulsion.

A photosensitive material can be manufactured by applying the coating solution prepared as described above onto the support and drying it. The above-mentioned aqueous emulsion can be easily applied to the support according to a known technique.

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

[Example 1] Preparation of silver halide emulsion 40 g of gelatin and potassium bromide were dissolved in water 3 to prepare 5
Heat to 0 ° C and add 34 g of silver nitrate to water with continuous stirring.
What was melt | dissolved in 00m was added in 10 minutes. Then, a solution prepared by dissolving 3.3 g of potassium iodide in 100 m of water was added over 2 minutes. The pH of the silver iodobromide emulsion thus obtained was adjusted, allowed to settle, excess salts were removed, and then the pH was adjusted to 6.0 to obtain a silver iodobromide emulsion with a yield of 400 g.

Preparation of benzotriazole silver emulsion 28 g of gelatin and 13.2 g of benzotriazole were added to 3 parts of water.
It was melted in 000m. The solution was stirred while maintaining the temperature at 40 ° C., and a solution prepared by dissolving 17 g of silver nitrate in 100 m of water was added over 2 minutes. Excess salt was precipitated and removed by adjusting the pH of the obtained emulsion. Thereafter, the pH was adjusted to 6.30 to obtain a benzotriazole silver emulsion. The yield of emulsion was 400 g.

Preparation of Photosensitive Composition 0.40 g of the following copolymer was dissolved in 100 g of trimethylolpropane triacrylate. Solution 1 above
The following hydrazine derivative (reducing agent) 1.2 was added to 6.92 g.
9 g, the following developer (reducing agent) 1.22 g, the following antifoggant 1% ethyl acetate solution 0.20 g, and the following dye (a) 0.25 g dissolved in methylene chloride 1.80 g. added. Further, 4.06 g of the silver halide emulsion prepared as described above and 3.95 g of the benzotriazole silver emulsion were added, and 1 minute was added using a homogenizer.
After stirring at 5000 rpm for 5 minutes, a photosensitive composition was obtained.

(Copolymer) (Hydrazine derivative) (Developer) (Antifoggant) (Dye a) Preparation of microcapsule solution 18.6% aqueous solution of Isoban (manufactured by Kuraray Co., Ltd.)
51 g and 48.56 g of a 2.89% aqueous solution of pectin were mixed, and the pH was adjusted to 4.0 with 10% sulfuric acid. The whole amount of the above-mentioned photosensitive composition was added to this aqueous solution, and the mixture was stirred by a homogenizer at 7,000 rpm for 2 minutes to emulsify the above-mentioned photosensitive composition in an aqueous solvent.

To 72.5 g of this aqueous emulsion, an aqueous solution of 40% urea 8.3
2 g, resorcin 11.3% aqueous solution 2.82 g, formalin 37% aqueous solution 8.56 g, and ammonium sulfate 8.00% aqueous solution 3.00 g were sequentially added, and heating was continued at 60 ° C. for 2 hours while stirring. Thereafter, the pH was adjusted to 7.0 using a 10% aqueous sodium hydroxide solution, and 3.62 g of a 30.9% aqueous sodium hydrogen sulfite solution was added to prepare a microcapsule solution.

Preparation of light-sensitive material Microcapsule liquid 10.0 prepared as described above
g to Emalex NP-8 (Nippon Emulsion Co., Ltd.)
10% aqueous solution 1.0 g, guanidine trichloroacetate 10% (water / ethanol = 50/50 volume ratio) solution 3.69 g were added, and coated on a 100 μm thick polyethylene terephthalate using a # 40 coating rod. A light-sensitive material (A) was prepared by drying at about 40 ° C.

Photosensitive materials (B) and (C) were prepared in the same manner except that the following dyes (b) and (c) were used in the same amounts instead of the above dye (a).

(Dye b) (Dye c) (However, in the above formula, R means the following groups) Image formation and evaluation thereof Each of the light-sensitive materials obtained as described above was imagewise exposed at 2000 lux for 1 second using a tungsten bulb,
Heated for 10 seconds on a hot plate heated to 125 ° C. Then, stack each light-sensitive material with high-quality paper 350
The density was measured with a Macbeth reflection densitometer with respect to the positive color image of magenta obtained on the high quality paper through a pressure roller of kg / cm ² .

The above measurement results are shown in Table 1 below.

Example 2 Preparation of Photosensitive Composition 0.40 g of the copolymer used in the preparation of the photosensitive composition of Example 1 was dissolved in 100 g of trimethylolpropane triacrylate. The hydrazine derivative (reducing agent) 1. used in Example 1 was added to 16.92 g of the above solution.
29 g, the developing agent (reducing agent) used in Example 1.
22 g, 0.20 g of a 1% ethyl acetate solution of the antifoggant used in Example 1, and the dye (d) below.
A solution of 33 g dissolved in 4.00 g methylene chloride was added. Further, 4.06 g of the silver halide emulsion prepared in Example 1 was added, and the mixture was homogenized with a homogenizer at 15.0 min / min.
The mixture was stirred at 00 rpm for 5 minutes to obtain a photosensitive composition.

(Dye d) Preparation of Photosensitive Material Example 1 was prepared using the photosensitive composition prepared as described above.
A microcapsule solution was prepared in the same manner as in 1. and a photosensitive material (D) was prepared in the same manner as in Example 1 using the microcapsule solution.

Further, instead of the above dye (d), the following dye (e),
Photosensitive materials (E), (F), (G), and (G) in the same manner except that (f), (g), (h), and the dye (a) used in Example 1 were used in the same amounts. (H) and (I) were prepared respectively.

(Dye e) (Dye e) (Dye f) (Dye g) (Dye h) Image formation and evaluation thereof An image was formed on each of the light-sensitive materials obtained as described above in the same manner as in Example 1, and the density of the positive color image obtained on the high-quality paper was measured with a Macbeth reflection densitometer.

The above measurement results are shown in Table 2 below.

Further, each light-sensitive material (D) on which an image is obtained as described above
When (1) to (I) were stored at room temperature in the dark for 3 days and then evaluated in the same manner, there was almost no change in both the minimum density and the minimum density of each photosensitive material.

As is clear from the above results, according to the image forming method of the present invention, only by using a short exposure time and a simple process,
A clear transfer image can be obtained on plain paper.

[Example 3] Preparation of photosensitive composition A uniform mixture having the following composition was prepared as an oil phase.

Trimethylolpropane triacrylate 20 g Phthalocyanine (metal free) 1 g 1,1'-azobis (1-cyclohexanecarbonitrile) 1 g Ethylcellulose 10% by weight acetone solution 4 g A mixture containing a silver halide emulsion having the following composition was added to the above mixture. In addition, the silver halide emulsion was emulsified by stirring at room temperature in the dark for 10 minutes.

Silver chlorobromide emulsion (containing 10% by weight of silver chlorobromide having a chlorine / bromine molar ratio of 1/1 and 7% by weight of gelatin) 6.0 g 5% by weight aqueous solution of sodium p-dodecylbenzenesulfonate 0.6 g Acetone was evaporated with continuous stirring to prepare a photosensitive composition containing microcapsules (wall material was ethyl cellulose) having a silver halide emulsion as a core substance.

Preparation of Double Microcapsule Liquid The total amount of the photosensitive composition prepared as described above was added to an aqueous solvent having the following composition, and stirred at 40 ° C. for 10 minutes to emulsify.

10% by weight aqueous solution of gelatin 20 g 2% by weight aqueous solution of carboxymethyl cellulose 40 g 5% by weight aqueous solution of sodium p-dodecylbenzene sulfonate 1 g While stirring the above emulsion at 40 ° C., 8 g of 20% by weight anhydrous sodium sulfate aqueous solution was added. The solution was added dropwise over 10 minutes, then 30 g of a 2 wt% aqueous solution of carboxymethyl cellulose was added, and further, 7 g of a 20 weight% aqueous solution of anhydrous sodium sulfate was added dropwise over 10 minutes to cause gelatin coacervation to cause gelatin wall. Was formed. Then, after adding 30 g of water and cooling at 5 ° C. for 10 minutes,
5 g of a 3 wt% aqueous solution of dimethylolurea was added and uniformly mixed. As described above, the double microcapsule liquid (consisting of silver halide emulsion / polymerizable compound / water, W /
O / W double capsule) was prepared. The average particle size of the outer capsule was about 10 μm.

Preparation of Photosensitive Material Using the double microcapsule solution prepared as described above, a mixture having the following composition was prepared and used as a coating solution.

Double microcapsule solution 8.0 g Sorbitol 0.3 g 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone 1 wt% methanol solution 0.8 g Benzotriazole 2 wt% methanol solution 0.3 g Triethanol 0.5 g of a 10 wt% methanol solution of amine A coating solution prepared as described above is applied onto a polyethylene terephthalate film (thickness 100 μm) and dried to form a photosensitive layer having an average film thickness of about 7 μm. Created.

Image formation and its evaluation The light-sensitive material obtained as described above was imagewise exposed through a document with a halogen lamp at an illuminance of 10 lux for 5 seconds, and then the light-sensitive layer side was heated on a hot plate heated to 125 ° C. They were brought into close contact with each other and heat-developed for 40 seconds. next,
Attach the photosensitive layer side of the photosensitive material to paper (plain paper),
After passing a pressure roller of 0 kg / cm ² , on the paper,
A clear positive blue image was formed on the original.

[Example 4] An image obtained in Example 3 was obtained by forming an image in the same manner as in Example 1 except that the paper (plain paper) used in Example 3 was wetted with water and then used. than,
An image with higher image density was obtained.

[Example 5] Using the double microcapsule liquid prepared in Example 3, a mixture having the following composition was prepared and used as a coating liquid.

Double microcapsule solution 8.0 g Sorbitol 0.3 g α-p-aminophenyl-β-acetylhydrazine 0.03 g 2% by weight benzotriazole in methanol solution 1.0 g Polyethylene terephthalate was prepared as above. A photosensitive material having a film thickness of about 10 μm was provided by coating and drying on a film to prepare a photosensitive material.

Using the photosensitive material obtained as described above, Example 3
An image was formed in the same manner as in 1. As a result, a clear positive blue image was formed on the original.

Claims (12)

[Claims] 1. A photosensitive material having a photosensitive layer containing a silver halide, a reducing agent, a polymerizable compound and a dye or a pigment on a support, and imagewise exposed to form a latent image of silver halide, Simultaneous exposure or after imagewise exposure,
A heat development treatment is performed by heating at 1 to 200 ° C. for 1 second to 5 minutes, thereby curing the polymerizable compound in the area where the latent image is formed, immobilizing the dye or pigment in the cured area, and performing the heat development. A transfer image forming method, characterized in that the dye or pigment in the uncured portion is transferred to the image receiving material by applying pressure to the processed light-sensitive material in a state of being superposed on the image receiving material. 2. The transfer image forming method according to claim 1, wherein the dye is a compound which dissolves in a polymerizable compound in an amount of 1% by weight or more at room temperature. 3. The transfer image forming method according to claim 1, wherein the pigment is fine particles having a particle diameter in the range of 0.01 to 10 μm. 4. The transfer image forming method according to claim 1, wherein the image receiving material is a sheet-like material selected from the group consisting of plain paper, coated paper and plastic film. 5. A polymerizable compound is dispersed in the photosensitive layer of the photosensitive material in the form of oil droplets, and among the components contained in the photosensitive layer, at least silver halide and a dye or pigment are oil droplets of the polymerizable compound. The transfer image forming method according to claim 1, which is present in 6. The transfer image forming method according to claim 5, wherein the oil droplets of the polymerizable compound are in the form of microcapsules. 7. A light-sensitive material having a light-sensitive layer containing a silver halide, a reducing agent, a polymerizable compound and a dye or a pigment on a support is imagewise exposed to form a latent image of silver halide. Simultaneous exposure or after imagewise exposure,
To 200 ° C. for 1 second to 5 minutes to perform heat development treatment, thereby curing the polymerizable compound in the area where the latent image is not formed, immobilizing the dye or pigment in the cured area, and heat development treatment. A transfer image forming method, characterized in that the dye or pigment in the uncured portion is transferred to the image receiving material by applying pressure while the image receiving material is superposed on the photosensitive material subjected to the above step. 8. The transfer image forming method according to claim 7, wherein the dye is a compound which dissolves in a polymerizable compound in an amount of 1% by weight or more at room temperature. 9. The transfer image forming method according to claim 7, wherein the pigment is fine particles having a particle diameter in the range of 0.01 to 10 μm. 10. The transfer image forming method according to claim 7, wherein the image receiving material is a sheet-like material selected from the group consisting of plain paper, coated paper and plastic film. 11. The transfer image forming method according to claim 7, wherein the photosensitive layer of the photosensitive material further contains a thermal polymerization initiator. 12. A polymerizable compound is dispersed in the photosensitive layer of the photosensitive material in the form of oil droplets, and among the components contained in the photosensitive layer, at least silver halide and a dye or pigment are oil droplets of the polymerizable compound. 12. The transfer image forming method according to claim 11, which is present in