JPH0830885B2 - Heat developable color photosensitive material and image forming method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a heat-developable color light-sensitive material, and in particular, a color image having a high image density and a low stain can be obtained and is excellent in storability. And a heat-developable color photosensitive material.

<Background Art> Photothermographic materials are known in this technical field, and the photothermographic material and its process are described, for example, in "Basics of Photographic Engineering", Non-Silver Salt Photograph Edition (1982, published by Corona Publishing Co.).
Pp.-255.

Many methods have been proposed for obtaining a color image by thermal development.

For example, U.S. Patents 3,531,286, 3,761,270, 4,
No. 021,240, Belgian Patent No. 802,519, Research Disclosure (hereinafter abbreviated as RD) September 1975 31-32
A method for forming a color image by binding an oxidized product of a developing agent and a coupler has been proposed in the pages and the like.

However, since the photothermographic material for obtaining the above color image is a non-fixing type, silver halide remains after the image formation, and the white background is gradually colored when exposed to strong light or stored for a long time. That causes a serious problem.
Further, the above-mentioned various methods generally have a drawback that it takes a relatively long time for development and an obtained image has only a high fog and a low image density.

In order to remedy these drawbacks, a method has been proposed in which a diffusible dye imagewise is formed or released by heating, and the diffusible dye is transferred to an image receiving material having a mordant with a solvent such as water. (U.S. Patent 4,500,626
No. 4,483,914, No. 4,503,137, No. 4,559,290;
In the above method, the developing temperature is still high and the stability of the photographic material over time cannot be said to be sufficient. Therefore, heat development is performed in the presence of a base or a base precursor and a small amount of water to accelerate the development by lowering the development temperature by transferring the dye.
A method for simplifying processing is disclosed in JP-A-59-218,443 and 61.
-238056, European Patent 210,660A2, etc. are disclosed.

Many methods have been proposed for obtaining a positive color image by thermal development.

For example, in U.S. Pat.No. 4,559,290, a so-called DRR compound is made into an oxidizing compound having no dye releasing ability in the presence of a reducing agent or a precursor thereof, and the reducing agent is oxidized by thermal development depending on the exposure amount of silver halide. A method of releasing a diffusible dye by reducing with a reducing agent remaining without being oxidized has been proposed. In addition, European Patent Publication No. 220746, Open Technical Report
87-6199 (Vol. 12, No. 22) discloses a compound that releases a diffusible dye by a similar mechanism as an N—X bond (X is an oxygen atom,
A heat-developable color light-sensitive material using a compound which releases a diffusible dye by reductive cleavage of a nitrogen atom or a sulfur atom) is described.

<Problems to be Solved by the Invention> However, in the above-mentioned heat-developable color light-sensitive material, due to decomposition and other side reactions of the dye-donor substance at the time of processing and generation of a coloring substance due to side reactions of other materials constituting the light-sensitive material However, it was found that there is a problem that the transfer stain is generated in the white background portion and the S / N is deteriorated. Furthermore, when the above-mentioned light-sensitive material was stored for a long period of time, the above-mentioned undesirable generation of transfer stain was observed, and it was found that there is a problem in the storage stability of the light-sensitive material.

The object of the present invention is to provide at least a light-sensitive silver halide, a binder, and a dye-donor compound which releases or forms a diffusible dye on a support in correspondence or inversely to the reaction in which silver halide is reduced to silver. It is to improve the S / N and storability with time of the heat-developable color photosensitive material.

<Means for Solving the Problems> An object of the present invention is to provide a support with at least a photosensitive silver halide, a binder, and a diffusible dye corresponding to the reduction of silver halide to silver or vice versa. A heat-developable color light-sensitive material having a dye-providing compound to be released or formed, characterized by having a hydrophilic binder layer containing a substance having a property of adsorbing a colored substance formed during image forming processing of the light-sensitive material. Achieved with a heat developable color light-sensitive material.

The substance having the property of adsorbing the colored substance of the present invention is at least one selected from activated carbon, cation exchange resin, anion exchange resin, silica gel, alumino silica gel, and activated alumina. Specific examples of the above adsorbent are given below.

Activated carbon; registered in JIS K-1474-75 and has physical adsorption ability. There are powder and granules. Manufacturers include Sanwa Carbon, Tsurumi Coal, Fujisawa Chemicals, Hokuetsu Carbon, Clera Chemicals, Takeda Pharmaceuticals, Wako Pure Chemicals and others.

Ion exchange resin; Strongly acidic cation exchange resin- (Amberlite) Amberlite IR as commercialized
-120B (Organo), (Douex) Dowex (Muromachi Kagaku).

Weakly acidic cation exchange resin- (Amberlite) Amberl
ite IRC-50, Diaion WK10.

Strongly basic anion exchange resin- (Amberlite) Ambe
rlite IRA-401, (Amber Light) Amberlite IRA-4
01, Diaion SA-11A ,, Diaion SA-20A,
(Douex) Dowex I, (Douex) Dowex Z.

Weakly basic anion exchange resin- (Amberlite) Ambe
rlite IR-4B, (Amber Light) Amberlite IR-45,
Diaion WA20, (Dowex) Dowex 3.

It is known that a substance is adsorbed by chemisorption by a dissociative group. The coloring substance generated by the present invention is mainly a dissociative dye, and it is preferable to use an anion exchange resin to adsorb this.

Other alumina, alumino-silica gel, and silica gel that can be used include those commercially available from Sumitomo Aluminum, Mizusawa Chemical, Catalysis, Wako Pure Chemical Industries, and other companies.

In the present invention, the adsorbent is in the form of fine particles (0.2-1 μm).
To be used as an aqueous dispersion.

When the substance is added, any of a method of adding it to the photosensitive layer and a method of adding it to the intermediate layer or the protective layer together with the dye-donor compound is possible. Further, it is also possible to form one or more layers containing the substance as a layer other than the above, and to provide the layer at any position of the multilayered photosensitive material. At that time, an intermediate layer may be provided between the layer containing the substance and another layer.

Since the adsorptive substance of the present invention is used in the hydrophilic binder, a coloring substance unnecessary for image formation can be efficiently adsorbed. Here, the hydrophilic binder can be selected and used from hydrophilic colloids or binders used as binders of the light-sensitive material and / or the dye fixing material described later.

The amount of the adsorptive substance used in the present invention varies depending on the type of substance and the layer to be added, but it is generally 1 mg to ² g, and particularly 10 mg to 500 mg per 1 m ² of the support.

The photothermographic material of the present invention basically has a photosensitive silver halide and a binder on a support and, if necessary, further contains an organic metal salt oxidizing agent, a dye-donating compound (as described later). (A reducing agent may also serve) and the like. These components are often added to the same layer, but if they are in a reactive state, they can be divided and added to separate layers. For example, when a colored dye-donor compound is present in the lower layer of the silver halide emulsion, the reduction in sensitivity can be prevented. The reducing agent is preferably incorporated in the photothermographic material, but it may be supplied from the outside by, for example, a method of diffusing from a dye fixing material described later.

In order to obtain a wide range of colors in the chromaticity diagram using the three primary colors of yellow, magenta and cyan, at least three silver halide emulsion layers sensitive to different spectral regions are used in combination. For example, blue sensitive layer, green sensitive layer,
There are combinations of three layers of a red-sensitive layer, a green-sensitive layer, a red-sensitive layer, an infrared-sensitive layer and the like. Each of the light-sensitive layers can take various arrangement orders known in a conventional type color light-sensitive material. Further, each of these photosensitive layers may be divided into two or more layers if necessary.

The photothermographic material may be provided with various auxiliary layers such as a protective layer, an undercoat layer, an intermediate layer, a yellow filter layer, an antihalation layer and a back layer.

The silver halide that can be used in the present invention may be any of silver chloride, silver bromide, silver iodobromide, silver chlorobromide, silver chloroiodide, and silver chloroiodobromide.

The silver halide emulsion used in the present invention may be a surface latent image type emulsion or an internal latent image type emulsion. The internal latent image type emulsion is used as a direct reversal emulsion in combination with a nucleating agent or an optical fogging. Further, it may be a so-called core-shell emulsion in which the inside of the grain and the surface layer of the grain have different phases. The silver halide emulsion may be monodisperse or polydisperse, and monodisperse emulsions may be mixed and used. Particle size is 0.1 ~
2μ, particularly 0.2 to 1.5μ is preferable. The crystal habit of the silver halide grains may be cubic, octahedron, tetrahedron, tabular with a high aspect ratio, or the like.

Specifically, U.S. Pat.No. 4,500,626, column 50, 4,6,6
28,021, Research Disclosure (hereinafter abbreviated as RD) 17029 (1978), JP-A-62-253159, and the like can be used any of the silver halide emulsions.

The silver halide emulsion may be used as it is without ripening, but it is usually chemically sensitized before use. Well-known sulfur sensitizing methods, reduction sensitizing methods, noble metal sensitizing methods and the like can be used alone or in combination for the emulsions for conventional type light-sensitive materials. These chemical sensitizations can also be carried out in the presence of a nitrogen-containing heterocyclic compound (JP-A-62-253159).

The coating amount of the photosensitive silver halide used in the present invention is in the range of 1 mg to 10 g / m ² in terms of silver.

In the present invention, an organic metal salt may be used as an oxidizing agent together with the photosensitive silver halide. Among such organic metal salts, organic silver salts are particularly preferably used.

Organic compounds that can be used to form the above organic silver salt oxidizing agent include benzotriazoles, fatty acids and other compounds described in US Pat. No. 4,500,626, columns 52 to 53. Further, silver salts of carboxylic acids having an alkynyl group such as silver phenylpropiolic acid described in JP-A-60-113235 and acetylene silver described in JP-A-61-290444 are also useful. Two or more kinds of organic silver salts may be used in combination.

The above-mentioned organic silver salt can be used in an amount of 0.01 to 10 mol, preferably 0.01 to 1 mol, per 1 mol of photosensitive silver halide. The total coating amount of the photosensitive silver halide and the organic silver salt is preferably 50 mg to 10 g / m ² in terms of silver.

Various antifoggants or photographic stabilizers can be used in the present invention. For example, RD17643
(1978) pages 24 to 25, azoles and azaindenes, nitrogen-containing carboxylic acids and phosphoric acids described in JP-A-59-168442, or mercapto compounds and metals thereof described in JP-A-59-111636. Salts, acetylene compounds described in JP-A-62-87957 and the like are used.

The silver halide used in the present invention may be spectrally sensitized with methine dyes and the like. The dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes.

Specifically, U.S. Pat. No. 4,617,257, JP-A-59-180
Examples include sensitizing dyes described in Nos. 550, 60-140335 and RD17029 (1978), pages 12-13.

These sensitizing dyes may be used alone, or a combination thereof may be used.
Often used for the purpose of supersensitization.

Along with the sensitizing dye, a dye having no spectral sensitizing effect by itself or a compound which does not substantially absorb visible light and exhibits supersensitization may be contained in the emulsion (for example, US Pat. No. 3,615,641). No. 61-226294, etc.).

These sensitizing dyes may be added to the emulsion at the time of chemical ripening or before or after chemical ripening, and U.S. Pat. No. 4,183,756.
No. 4,225,666 before and after the nucleation of silver halide grains. The addition amount is generally about 10 ^-8 to 10 ^-2 mol per mol of silver halide.

A hydrophilic binder is preferably used as the binder of the constituent layers of the light-sensitive material and the dye fixing material. Examples thereof include those described on pages (26) to (28) of JP-A-62-253159. Specifically, a transparent or translucent hydrophilic binder is preferable, and for example, gelatin or a protein or cellulose derivative such as a gelatin derivative, starch, gum arabic, dextran, a natural compound such as a polysaccharide such as pullulan, and polyvinyl alcohol, Examples thereof include polyvinylpyrrolidone, acrylamide polymer, and other synthetic polymer compounds. Further, superabsorbent polymers described in JP-A-62-245260, that is, --COOM or --SO ₃ M (M
Is a homopolymer of a vinyl monomer having a hydrogen atom or an alkali metal or a copolymer of the vinyl monomers with each other or with another vinyl monomer (for example, sodium methacrylate, ammonium methacrylate, Sumika Gel L- manufactured by Sumitomo Chemical Co., Ltd.). 5H) is also used. These binders can be used in combination of two or more.

When employing a system in which a small amount of water is supplied for thermal development, the use of the superabsorbent polymer makes it possible to quickly absorb water. Further, when the super absorbent polymer is used in the dye fixing layer or its protective layer, the dye can be prevented from being retransferred from the dye fixing material to another after the transfer.

In the present invention, the coating amount of the binder is 20 per 1 m ^2.
It is preferably g or less, particularly 10 g or less, and more preferably 7 g or less.

The constituent layers (including the back layer) of the light-sensitive material or the dye-fixing material include various polymers for the purpose of improving physical properties of the film such as dimensional stabilization, curl prevention, adhesion prevention, film cracking prevention, and pressure increase / decrease prevention. A latex can be included. Specifically, JP-A Nos. 62-245258, 62-136648, 62
Any of the polymer latices described in No. 110066 and the like can be used. In particular, when a polymer latex having a low glass transition point (40 ° C or lower) is used in the mordant layer, cracking of the mordant layer can be prevented, and when a polymer latex having a high glass transition point is used in the back layer, a curl-preventing effect is obtained. can get.

As the reducing agent used in the present invention, those known in the field of photothermographic materials can be used. Further, a dye-donor compound having a reducing property described later is also included (in this case, other reducing agents can be used together). Further, a reducing agent precursor which has no reducing property itself but exhibits reducing property by the action of a nucleophile or heat during the development process can also be used.

Examples of reducing agents used in the present invention include US Pat.
4,500,626, columns 49-50, 4,483,914, columns 30-31
Column, No. 4,330,617, No. 4,590,152, JP-A-60-14
0335, pages (17)-(18), 57-40245, 56-1.
38736, 59-178458, 59-53831, 59-1824
No. 49, No. 59-182450, No. 60-119555, No. 60-128436
No. 60-128439, No. 60-60-198540, No. 60
-181742, 61-259253, 62-244044, 62-
131253 to 62-131256, European Patent 220,746A
There are reducing agents and reducing agent precursors described in No. 2, pp. 78-96.

Combinations of various reducing agents such as those disclosed in US Pat. No. 3,039,869 can also be used.

When a diffusion resistant reducing agent is used, an electron transfer agent and / or an electron transfer agent may be added, if necessary, in order to promote electron transfer between the diffusion resistant reducing agent and the developable silver halide. A combination of precursors can be used.

The electron transfer agent or its precursor can be selected from the above-mentioned reducing agent or its precursor.
It is desirable that the mobility of the electron transfer agent or its precursor is higher than that of the diffusion-resistant reducing agent (electron donor). Particularly useful electron transfer agents are 1-phenyl-3-pyrazolidones or aminophenols.

The diffusion-resistant reducing agent (electron donor) used in combination with the electron transfer agent may be one that does not substantially move in the layer of the light-sensitive material among the reducing agents described above, and preferably hydroquinone, Examples thereof include sulfonamide phenols, sulfonamide naphthols, compounds described as electron donors in JP-A-53-110827, and dye-donating compounds having diffusion resistance and reducing properties described later.

In the present invention, the reducing agent is added in an amount of 1 mol of silver.
The amount is 0.001 to 20 mol, particularly preferably 0.01 to 10 mol.

In the present invention, silver can be used as the image forming substance. In addition, when silver ions are reduced to silver under high temperature conditions, they may contain a compound that generates or releases a mobile dye corresponding to this reaction or vice versa, that is, contains a dye-donating compound. it can.

Examples of the dye-donating compound that can be used in the present invention include a compound (coupler) that forms a dye by an oxidative coupling reaction. The coupler may be a 4-equivalent coupler or a 2-equivalent coupler. Also,
A 2-equivalent coupler having a diffusion resistant group as a leaving group and forming a diffusible dye by an oxidative coupling reaction is also preferable. The diffusion resistant group may form a polymer chain. Specific examples of color developing agents and couplers are described in James, "The Theory of the Photographic Process," No. 4
Edition (TH James “The Theory of the Photographic Proc
ess ") 291-334 and 354-361, JP-A-58-1235.
33, 58-149046, 58-149047, 59-111148
No. 59, No. 59-124399, No. 59-174835, No. 59-231539
No., No. 59-231540, No. 60-2950, No. 60-2951 and No.
60-14242, 60-23474, 60-66249 and the like.

As another example of the dye-donating compound, a compound having a function of releasing or diffusing a diffusible dye in an image form can be mentioned. This type of compound can be represented by the following general formula [LI].

(Dye-Y) nZ [LI] Dye represents a dye group, a temporarily shortened dye group or a dye precursor group, Y represents a simple bond or a linking group, and Z represents an image-wise latent image. Corresponding to or opposite to the light-sensitive silver salt having (Dye-Y) n-Z or causing a difference in the diffusivity of the compound represented by (Dye-Y) n-Z. Y) represents a group having a property of causing a difference in diffusibility from n-Z, n represents 1 or 2, and when n is 2, two Dye-Y are the same or different. Good.

Specific examples of the dye donating compound represented by the general formula [LI] include the following compounds.
The following items (1) to (2) form a diffusible dye image (positive dye image) in reverse correspondence to the development of silver halide.
Means to form a diffusible dye image (negative dye image) corresponding to the development of silver halide.

U.S. Pat.Nos. 3,134,764, 3,362,819, and 3,
597,200, 3,544,545, 3,482,972 and the like, a dye developer in which a hydroquinone-based developer and a dye component are linked. This dye developing agent is diffusible in an alkaline environment, but becomes non-diffusible when it reacts with silver halide.

As described in US Pat. No. 4,503,137, a non-diffusible compound which releases a diffusible dye in an alkaline environment but loses its ability when reacted with a silver halide can be used. Examples thereof include compounds that release a diffusible dye by an intramolecular nucleophilic substitution reaction described in U.S. Pat.No. 3,980,479 and the like, by intramolecular rewinding reaction of the isoxazolone ring described in U.S. Pat. Examples include compounds that release diffusible dyes.

U.S. Patent No. 4,559,290, European Patent No. 220,746A2,
As described in Published Technical Report 87-6199, non-diffusible compounds which release diffusible dye by reacting with the reducing agent left unoxidized by development can also be used.

Examples thereof include U.S. Pat.Nos. 4,139,389 and 4,13.
9,379, JP-A-59-185333, JP-A-57-84453, etc., compounds that release a diffusible dye by a nucleophilic substitution reaction in the molecule after reduction, U.S. Pat.
No., JP-A-59-101649, JP-A-61-88257, RD24025 (19
1984) and other compounds that release a diffusible dye by an intramolecular electron transfer reaction after reduction, West German Patent No. 1
3,008,588A, JP-A-56-142530, U.S. Pat.No. 4,343,
No. 893, No. 4,619,884, etc., a compound that releases a diffusible dye by cleavage of a single bond after reduction, a compound that releases a diffusible dye after electron acceptance as described in US Pat. No. 4,450,223, etc. Nitro compounds, U.S. Pat.No. 4,609,61
Examples thereof include compounds that release a diffusible dye after accepting electrons as described in No. 0 and the like.

Further, as a more preferable one, European Patent No. 220,746A
No. 2, Open Technical Report 87-6199, Japanese Patent Application No. 62-34953, No. 62-34
N-X bond (X is oxygen,
A compound having an electron-withdrawing group (representing a sulfur or nitrogen atom) and SO ₂ − in one molecule described in Japanese Patent Application No. 62-106885.
A compound having an X bond (X is as defined above) and an electron withdrawing group, a PO-X bond (X is as defined above) and an electron withdrawing group in one molecule described in Japanese Patent Application No. 62-106895. compound, C-X 'bond (X' in marked within one molecule in Japanese Patent Application Sho 62-106887 is X as defined either or -SO ₂ - represents a) to Yusuke compound and having an electron-withdrawing group can be mentioned To be

Among these, a compound having an N—X bond and an electron-withdrawing group in one molecule is particularly preferable. A specific example is European Patent No. 22.
0,746A2 compounds (1) to (3), (7) to
(10), (12), (13), (15), (23) to (26),
(31), (32), (35), (36), (40), (41),
(44), (53) to (59), (64), (70), Open Technical Report 87
-6199 compounds (11) to (23) and the like.

A compound that has a diffusible dye as a leaving group and releases the diffusible dye by reacting with an oxidized form of a reducing agent (DDR coupler). Specifically, British Patent No. 1,330,524
And Japanese Patent Publication No. 48-39,165, U.S. Pat. Nos. 3,443,940, 4,474,867, and 4,483,914.

A compound (DRR compound) that is reducible to silver halides or organic silver salts and releases a diffusible dye when its partner is reduced. Since this compound does not need to use another reducing agent, it is preferable because there is no problem of image contamination due to oxidative decomposition products of the reducing agent. A typical example is U.S. Pat. No. 3,92.
No. 8,312, No. 4,053,312, No. 4,055,428, No. 4,3
36,322, JP-A-59-65839, JP-A-59-69839, JP-A-53-
3819, 51-104,343, RD17465, U.S. Pat.
5,062, 3,728,113, 3,443,939, JP-A-5
8-116,537, 57-179840, U.S. Pat.No. 4,500,626
No. etc. Specific examples of the DRR compound include the compounds described in the above-mentioned U.S. Pat. No. 4,500,626 in columns 22 to 44. Among them, the compounds (1) to (3) described in the above-mentioned U.S. Pat. (10) ~ (13), (1
6) ~ (19), (28) ~ (30), (33) ~ (35), (3
8) to (40) and (42) to (64) are preferable. The compounds described in US Pat. No. 4,639,408, columns 37 to 39 are also useful.

In addition, as a dye-donor compound other than the coupler and the general formula [LI] described above, a dye silver compound in which an organic silver salt and a dye are bound (Research Disclosure, May 1978).
Issue, pages 54-58), azo dyes used in the heat-developable silver dye bleaching method (US Pat. No. 4,235,957, Research Disclosure, April 1976, pages 30-32, etc.), leuco dyes (US Patents 3,985,565, 4,022,617, etc.) can also be used.

Hydrophobic additives such as dye-donor compounds and antidiffusive reducing agents can be incorporated into the layer of the photographic material by known methods such as the method described in US Pat. No. 2,322,027. In this case, JP-A-59-83154, JP-A-59-178451, and JP-A-59-178451.
-178452, 59-178453, 59-178454, 59-
A high-boiling point organic solvent such as those described in 178455 and 59-178457 can be used in combination with a low-boiling point organic solvent having a boiling point of 50 ° C to 160 ° C, if necessary.

1 g of dye-donor compound used in an amount of high boiling organic solvent
On the other hand, it is 10 g or less, preferably 5 g or less. Also, 1 cc or less, further 0.5 cc or less, especially 0.
3cc or less is suitable.

The dispersion method using a polymer described in JP-B-51-39853 and JP-A-51-59943 can also be used.

In the case of a compound which is substantially insoluble in water, fine particles can be dispersed and contained in a binder in addition to the above method.

When dispersing the hydrophobic compound in the hydrophilic colloid, various surfactants can be used. For example, JP-A-59
The surfactants listed on pages (37) to (38) of No. 157636 can be used.

In the present invention, a compound capable of activating development and simultaneously stabilizing an image can be used in the light-sensitive material. For specific compounds preferably used, U.S. Pat.
No. 626, columns 51-52.

In a system for forming an image by diffusion transfer of a dye, a dye fixing material is used together with a light-sensitive material. The dye fixing material may be applied separately on a support different from the photosensitive material, or may be applied on the same support as the photosensitive material. Regarding the relationship between the light-sensitive material and the dye fixing material, the relationship with the support, and the relationship with the white reflective layer, the relationship described in column 57 of US Pat. No. 4,500,626 can be applied to the present application.

The dye fixing material preferably used in the present invention has at least one layer containing a mordant and a binder. As the mordant, one known in the photographic field can be used, and specific examples thereof include U.S. Pat. No. 4,500,626, columns 58 to 59 and JP-A-61
-88256, mordanting agents described on pages (32) to (41), JP-A-6-26
2-244043, 62-244036, etc. can be mentioned. Further, a dye-receptive polymer compound as described in US Pat. No. 4,463,079 may be used.

If necessary, the dye fixing material may be provided with auxiliary layers such as a protective layer, a peeling layer, and an anti-curl layer. In particular, it is useful to provide a protective layer.

The constituent layers of the light-sensitive material and the dye-fixing material include a plasticizer,
A high-boiling point organic solvent can be used as a slipping agent or a peeling property improving agent between the light-sensitive material and the dye-fixing material. Specific examples include those described in JP-A-62-253159, page (25), JP-A-62-245253, and the like.

Further, various silicone oils (all silicone oils from dimethyl silicone oils to modified silicone oils obtained by introducing various organic groups into dimethyl siloxane) can be used for the above purpose. Examples include various modified silicone oils described in "Modified Silicone Oil" technical material P6-18B issued by Shin-Etsu Silicone Co., Ltd., especially carboxy-modified silicone (trade name X-22-37.
10) etc. are effective.

Further, the silicone oils described in JP-A No. 62-215953 and Japanese Patent Application No. 62-23687 are also effective.

An anti-fading agent may be used in the light-sensitive material and the dye-fixing material. Anti-fading agents include, for example, antioxidants, ultraviolet absorbers, or certain metal complexes.

Examples of the antioxidant include chroman compounds, coumarane compounds, phenol compounds (for example, hindered phenols), hydroquinone derivatives, hindered amine derivatives, and spiroindane compounds. The compounds described in JP-A No. 61-159644 are also effective.

Examples of UV absorbers include benzotriazole compounds (US Pat. No. 3,533,794), 4-thiazolidone compounds (US Pat. No. 3,352681), benzophenone compounds (JP-A No. 46-2784), and others. JP 54-
There are compounds described in 48535, 62-136641, 61-88256 and the like. Further, the ultraviolet absorbing polymer described in JP-A-62-260152 is also effective.

As the metal complex, U.S. Pat. Nos. 4,241,155 and 4,2
45,018, columns 3 to 36, 4,254,195, columns 3 to 8, JP-A-62-174741, 61-88256 (27) to (29),
Japanese Patent Application Nos. 62-234103 and 62-31096, Japanese Patent Application No. 62-23059
There are compounds described in No. 6 and the like.

Examples of useful anti-fading agents are disclosed in JP-A-62-215272 (125).
~ (137) pages.

The anti-fading agent for preventing the fading of the dye transferred to the dye-fixing material may be contained in the dye-fixing material in advance, or may be supplied to the dye-fixing material from the outside such as a light-sensitive material. .

The above-mentioned antioxidant, ultraviolet absorber, and metal complex may be used in combination.

A fluorescent whitening agent may be used in the light-sensitive material and the dye-fixing material. In particular, it is preferable to incorporate a fluorescent whitening agent in the dye fixing material or supply it from the outside such as a light-sensitive material. An example is K. Veenkataraman's ed. “The Chemistry of Synt
hetic Dyes ", Volume V, Chapter 8, and compounds described in JP-A-61-143752 and the like. More specifically, stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazolyl compounds, naphthalimide compounds, pyrazoline compounds, carbostyryl compounds and the like can be mentioned.

The fluorescent whitening agent can be used in combination with an anti-fading agent.

As a hardener used for a constituent layer of a light-sensitive material or a dye-fixing material, U.S. Pat. No. 4,678,739, column 41, JP-A-59-116655 is used.
No. 62-245261, No. 61-18942, and the like. More specifically, aldehyde type hardener (formaldehyde etc.), aziridine type hardener, epoxy type hardener Vinyl sulfone type hardeners (N, N'-ethylene-bis (vinylsulfonylacetamide) ethane, etc.), N-methylol type hardeners (dimethylol urea, etc.), or polymer hardeners (JP-A-62) -234157 and the like).

In the constituent layers of the light-sensitive material and the dye-fixing material, various surfactants can be used for the purpose of coating aid, improvement of releasability, improvement of sliding property, prevention of electrostatic charge, acceleration of development and the like. Specific examples of the surfactant are described in JP-A-62-173463 and JP-A-62-183457.

The constituent layers of the light-sensitive material and the dye-fixing material may contain an organic fluoro compound for the purpose of improving slipperiness, preventing electrification, improving peelability and the like. As typical examples of organic fluoro compounds, JP-B-57-9053, columns 8 to 17, JP-A-61-20944 can be used.
Nos. 62-135826 and the like, and fluorine-based surfactants, or hydrophobic fluorine compounds such as oily fluorine-based compounds such as fluorine oil or solid fluorine compound resins such as tetrafluoroethylene resin. To be

A matting agent can be used for the photosensitive material and the dye fixing material. As the matting agent, in addition to the compounds described in JP-A No. 61-88256, page 29, such as silicon dioxide, polyolefin or polymethacrylate, Japanese Patent Application No. 62-110064, such as benzoguanamine resin beads, polycarbonate resin beads, AS resin beads, etc. No. 62-110065.

In addition, in the constituent layers of the photosensitive material and the dye fixing material,
It may be contained in a hot solvent, an antifoaming agent, an antibacterial / antifungal agent, colloidal silica or the like. Specific examples of these additives are disclosed in JP-A-61-
88256, pages (26) to (32).

In the present invention, an image forming accelerator can be used in the light-sensitive material and / or the dye-fixing material. The image formation accelerator includes a redox reaction between a silver salt oxidizing agent and a reducing agent, a reaction such as generation of a dye from a dye-donor substance, decomposition of the dye or release of a diffusible dye, and a light-sensitive material layer. Has a function of accelerating the transfer of the dye from the dye to the dye fixing layer, and from the physicochemical function, a base or a base precursor, a nucleophilic compound, a high boiling organic solvent (oil), a thermal solvent, a surfactant, silver Alternatively, they are classified into compounds that interact with silver ions. However, these substance groups generally have a composite function, and usually have some of the above-mentioned accelerating effects together. For more information on these, see U.S. Pat.
No. 9 columns 38-40.

Examples of the base precursor include salts of organic acids and bases that are decarboxylated by heat, compounds that release amines by intramolecular nucleophilic substitution reaction, Rossen rearrangement or Beckmann rearrangement. Specific examples thereof are U.S. Pat. No. 4,511,493 and JP-A-62.
-65038 and the like.

In a system in which heat development and dye transfer are performed simultaneously in the presence of a small amount of water, it is preferable to add a base and / or a base precursor to the dye-fixing material in order to improve the storage stability of the light-sensitive material.

In addition to the above, a combination of a sparingly soluble metal compound described in European Patent Publication No. 210,660 and a compound capable of forming a complex with a metal ion constituting the sparingly soluble metal compound (referred to as a complex forming compound); Compounds that generate a base by electrolysis described in JP-A 61-232451 can also be used as the base precursor. The former method is particularly effective. It is advantageous to add the hardly soluble metal compound and the complex-forming compound separately to the light-sensitive material and the dye-fixing material.

In the light-sensitive material and / or the dye-fixing material of the present invention, various development terminators can be used for the purpose of always obtaining a constant image with respect to variations in processing temperature and processing time during development.

The term "development terminating agent" as used herein refers to a compound that immediately neutralizes or reacts with a base to reduce the concentration of the base in the film to stop the development after proper development, or inhibits development by interacting with silver and a silver salt. Compound. 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, or a nitrogen-containing heterocyclic compound, a mercapto compound and a precursor thereof. More specifically, JP-A-62-253159 (31) to (32)
Page.

As the support of the light-sensitive material or dye fixing material of the present invention,
A material that can withstand the processing temperature is used. Generally, paper and synthetic polymer (film) are used. Specifically, polyethylene terephthalate, polycarbonate, polyvinyl chloride, polystyrene, polypropylene, polyimide, celluloses (for example, triacetyl cellulose) or those films containing pigments such as titanium oxide are further prepared from polypropylene. The film method synthetic paper, mixed paper made from synthetic resin pulp such as polyethylene and natural pulp, Yankee paper, baryta paper, coated paper (particularly cast coated paper), metal, cloth, glass and the like are used.

These can be used alone or as a support laminated on one or both sides with a synthetic polymer such as polyethylene.

In addition, the supports described in JP-A-62-253159, pages (29) to (31) can be used.

A hydrophilic binder, a semiconductive metal oxide such as alumina sol or tin oxide, carbon black and other antistatic agents may be coated on the surface of these supports.

Examples of the method for exposing and recording an image on a light-sensitive material include a method of directly photographing a landscape or a person using a camera, a method of exposing through a reversal film or a negative film using a printer or an enlarger, a method of copying a copier. A method of scanning and exposing an original image through a slit, etc. using an exposure device, a method of exposing image information by emitting light from a light emitting diode, various lasers, etc. via an electric signal, image information of a CRT, liquid crystal display, electroluminescence display. There is a method of outputting to an image display device such as a plasma display and exposing directly or through an optical system.

As a light source for recording an image on a photosensitive material, as described above, natural light, a tungsten lamp, a light emitting diode, a laser light source, a CRT light source, etc., U.S. Pat.
The light source described in the column can be used.

Image exposure can also be performed using a wavelength conversion element in which a non-linear optical material and a coherent light source such as laser light are combined. Here, the non-linear optical material is a material capable of exhibiting non-linearity between the polarization and the electric field, which appears when a strong optical electric field such as laser light is applied, such as lithium niobate and potassium dihydrogen phosphate (KDP). ), Lithium iodate, inorganic compounds typified by BaB ₂ O ₄ , urea derivatives, nitroaniline derivatives, for example, nitropyridine-N-such as 3-methyl-4-nitropyridine-N-oxide (POM). Oxide derivatives, JP-A-61-53462 and JP-A-6-53462
The compounds described in 2-210432 are preferably used. As a form of the wavelength conversion element, a single crystal optical waveguide type, a fiber type and the like are known, and any of them is useful.

Further, the image information is an image signal obtained from a video camera, an electronic still camera or the like, a television signal represented by Nippon Television Signal Standard (NTSC), an image obtained by dividing an original image into many pixels such as a scanner. It is possible to use image signals created using a computer represented by Signal, CG, CAD.

The light-sensitive material and / or the dye-fixing material may have a form having a conductive heating element layer as a heating means for heat development or diffusion transfer of dye. As the transparent or opaque heating element in this case, those described in JP-A-61-145544 can be used. Note that these conductive layers also function as antistatic layers.

The heating temperature in the heat development step is about 50 ° C. to about 25 ° C., but about 80 ° C. to about 180 ° C. is particularly useful. The dye transfer process may be performed at the same time as the heat development, or may be performed after the end of the heat development process. In the latter case, the heating temperature in the transfer step can be transferred in the range from the temperature in the heat development step to room temperature, but it is more preferably 50 ° C. or higher and about 10 ° C. lower than the temperature in the heat development step.

Although the transfer of the dye occurs only by heat, a solvent may be used to accelerate the transfer of the dye.

Further, as described in detail in JP-A-59-218443, JP-A-61-238056 and the like, a method of performing development and transfer simultaneously or continuously by heating in the presence of a small amount of solvent (particularly water) is also available. It is useful. In this method, the heating temperature is preferably 50 ° C or higher and not higher than the boiling point of the solvent, for example, 50 ° C or higher when the solvent is water.
100 ° C or less is desirable.

Examples of the solvent used for accelerating the development and / or transferring the diffusible dye to the dye-fixing layer include water or a basic aqueous solution containing an inorganic alkali metal salt or an organic base (for these bases, an image). Those described in the section of the formation accelerator are used). Further, a low boiling point solvent, or a mixed solution of a low boiling point solvent and water or a basic aqueous solution can be used. Further, a surfactant, an antifoggant, a sparingly soluble metal salt and a complex-forming compound may be contained in the solvent.

These solvents can be used by a method of applying them to the dye fixing material, the photosensitive material or both. The amount used may be as small as the weight of the solvent corresponding to the maximum swelling volume of the entire coating film or less (particularly the amount of the solvent corresponding to the maximum swelling volume of the entire coating film less the weight of the total coating film).

Examples of the method of applying a solvent to the photosensitive layer or the dye fixing layer include the method described in JP-A No. 61-147244, page (26). Alternatively, the solvent may be contained in a microcapsule and previously incorporated in the light-sensitive material or the dye-fixing material or both.

Further, in order to promote dye transfer, a method in which a hydrophilic thermal solvent that is solid at room temperature and dissolves at high temperature is built into the photosensitive material or the dye fixing material can be adopted. The hydrophilic thermal solvent may be incorporated in either the photosensitive material or the dye fixing material,
It may be built in both. Also, the built-in layer is an emulsion layer,
It may be any of an intermediate layer, a protective layer and a dye fixing layer, but it is preferably incorporated in the dye fixing layer and / or its adjacent layer.

Examples of hydrophilic thermal solvents include ureas, pyridines, amides, sulfonamides, imides, alkenyls,
There are oximes and other heterocycles.

Further, a high-boiling point organic solvent may be contained in the light-sensitive material and / or the dye-fixing material in order to promote dye transfer.

As a heating method in the developing and / or transferring step, it is brought into contact with a heated block or plate, or brought into contact with a hot plate, a hot presser, a heat roller, a halogen lamp heater, an infrared and far infrared lamp heater, For example, passing through a high temperature atmosphere.

The method described in JP-A-61-147244 (page 27) can be applied to the pressure condition and the method of applying pressure when the light-sensitive material and the dye-fixing material are superposed and brought into close contact with each other.

Any of a variety of thermal development apparatus can be used in processing the photographic elements of this invention. For example, JP-A-59-75247 and 59-75247.
-177547, 59-181353, 60-18951, Shokai 6
An apparatus described in, for example, No. 2-25944 is preferably used.

<Example 1> A method for preparing the emulsion (I) for the first layer will be described.

Well a stirred solution of aqueous gelatin solution (gelatin in water 800 ml 20 g, potassium bromide 1g, and _{OH (CH 2) 2 S (} CH 2)
₂ OH 0.5 g were added and those kept at 50 ° C.) to (I) below
The liquid, the liquid (II), and the liquid (III) were added simultaneously at the same flow rate for 30 minutes. Thus the average particle size 0.42μ
A monodisperse silver bromide emulsion in which the dye of FIG.

After washing with water and desalting, 20 g of lime-treated ossein gelatin was added to adjust pH to 6.4 and pAg to 8.2, and then kept at 60 ° C.
9 mg of sodium thiosulfate, 6 ml of 0.01% aqueous solution of chloroauric acid, 4
-Hydroxy-6-methyl-1,3,3a, 7-tetrazaindene (190 mg) was added, and the mixture was chemically sensitized for 45 minutes. The yield of the emulsion was 635 g.

Next, the emulsion (II) for the third layer will be described.

The following solution (I) and (II) were added to a well-stirred aqueous gelatin solution (a solution obtained by adding 20 g of gelatin, 0.30 g of potassium bromide, 6 g of sodium chloride and 0.015 g of the following chemical A to 730 ml of water and keeping the temperature at 60.0 ° C.) The liquid was added simultaneously at an equal flow rate over 60 minutes. After the addition of the solution (I) was completed, a solution (III) of the following sensitizing dye in methanol was added. Thus, a monodisperse cubic emulsion in which a dye having an average particle size of 0.45μ was adsorbed was prepared.

After washing with water and desalting, 20 g of gelatin was added to adjust the pH to 6.4 and pAg.
After adjusting to 7.8, chemical sensitization was performed at 60.0 ° C. The chemicals used at this time were 1.6 mg of triethylthiourea and 100 m of 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene.
The aging time in g was 55 minutes. The yield of this emulsion was 635 g.

Next, how to prepare the emulsion (III) for the fifth layer will be described.

Well stirred gelatin aqueous solution (30 g gelatin, 600 g potassium bromide, and HO (CH ₂ ) ₂ S (CH ₂ ) _{2 in} 600 ml water.
Solution (I) and solution (II) below were simultaneously added to S (CH ₂ ) ₂ OH (0.5 g added and kept at 65 ° C.) over 20 minutes. After that, the following solution (III) and solution (IV) were simultaneously added over 30 minutes. Washed with water and desalted, lime-treated ossein gelatin
After adding 20 g to adjust pH to 6.2 and pAg to 8.5, sodium thiosulfate, chloroauric acid and 4-hydroxy-6-methyl-1,
Optimal chemical sensitization was performed by adding 3,3a, 7-tetrazaindene. In this way, monodisperse particles with an average particle size of 0.50 μm 8
600 g of a surfaced silver iodobromide emulsion was obtained.

Next, a method for preparing a gelatin dispersion of a dye-donor substance will be described. 20 g of yellow dye-providing substance (1) ^* ,
Weigh 13.6 g of electron donor (1) ^* and 10 g of tricyclohexyl phosphate, add 57 ml of ethyl acetate, and weigh about 60 g.
It was heated to dissolve at 0 ° C. to obtain a uniform solution. This solution, 110 g of a 10% lime-processed gelatin solution, 65 ml of water, and 1.7 g of sodium dodecylbenzenesulfonate were stirred and mixed, and then dispersed by a homogenizer at 10,000 rpm for 10 minutes. This dispersion is called a yellow dye-donor substance dispersion.

A dispersion of magenta and cyan dye-donor substances is made using a magenta dye-donor substance (2) ^* or a cyan dye-donor substance (3) ^* , similar to the dispersion of a yellow dye-donor substance. It was

From these, a color photosensitive material 101 having a multi-layer structure shown in [Table 1] was prepared.

Heat-developable color light-sensitive materials 102 to 105 having exactly the same composition as the light-sensitive material 101 except that the coating layers A to E shown below are additionally applied between the first layer of the light-sensitive material 101 and the support. did.

Further, in the second, fourth and sixth layers of the light-sensitive material 101, [Table 2]
As shown in, heat-developable color light-sensitive materials 107 to 112 having exactly the same composition as the light-sensitive material 101 except that the additives were added were prepared.

Solid powders such as activated carbon, anion exchange resin, and alumina gel used in this example were added after preparing a gelatin dispersion as shown below.

<Method of preparing adsorbent dispersion> Activated carbon 6g, gelatin 4g, surfactant (1) ^* 0.5g, surfactant (4) ^* 0.4g, surfactant (5) ^* 0.7g and water 190
cc was added, and the mixture was stirred with a homogenizer at 10,000 rpm for 10 minutes. This was transferred to a Dynomill, 200 g of glass beads were added, and the mixture was crushed at 3000 rpm for 30 minutes. This is called a gelatin dispersion of activated carbon.

 Next, how to make the dye fixing material will be described.

A dye fixing material R-1 was prepared by coating on a polyethylene-laminated paper support in the constitution shown in the following table.

A tungsten light bulb was used for the color light-sensitive material having the above-mentioned multi-layer structure, and it was exposed at 5000 lux for 1/10 seconds through B, G, R and gray color separation filters whose densities were continuously changed.

While feeding the exposed light-sensitive material at a linear velocity of 20 mm / sec, 15 ml / m ² of water was supplied to the emulsion surface by a wire bar, and immediately thereafter, the emulsion was superposed so that the image-receiving material and the film surface were in contact with each other.

The film was heated for 15 seconds using a heat roller whose temperature was adjusted so that the temperature of the film absorbed was 85 ° C. Then, when peeled off from the image receiving material, clear images of blue, green, red and gray corresponding to the color separation filters of B, G, R and gray were obtained on the image receiving material without waste.

The results of measuring the maximum density (Dmax) and the minimum density (Dmin) of the gray part for each color of cyan, magenta and yellow are shown in [Table 4].

From Table 4, it can be seen that the light-sensitive materials 103 to 112 of the present invention can obtain an image having a lower stain than the light-sensitive materials 101 and 102.

Next, after the photosensitive materials 101 to 112 were stored at 40 ° C. and a humidity of 70% for 7 days and then exposed and developed in the same manner, the photosensitive materials 101 and 102 had cyan, magenta, and yellow Dmin values. However, each color increased by ~ 0.05, while 103-1
At 12, there was an increase of 0.01 to 0.02 for each color. From these results, it can be seen that the photosensitive materials 103 to 112 of the present invention have good storage stability.

Example 2 Using the same emulsion, dye donating substance, electron donor and electron transfer agent as in the color light-sensitive material 101 of Example 1, a multi-layer color light-sensitive material 201 having the structure shown in [Table 5] was prepared. .

Unless otherwise specified, the same additives as in the photosensitive material 101 were used.

 The organic silver salt emulsion was prepared as follows.

20 g of gelatin and 5.9 g of 4-acetylaminophenylpropiolic acid were dissolved in 1000 ml of a 0.1% aqueous sodium hydroxide solution and 200 ml of ethanol. This solution was kept at 40 ° C. and stirred. To this solution, a solution prepared by dissolving 4.5 g of silver nitrate in 200 ml of water was added over 5 minutes. Then, excess salt was removed by a precipitation method. Then, the pH was adjusted to 6.3 to obtain 300 g of an organic silver salt dispersion.

An antifoggant precursor (1) ^{* 1} having the following structure was added in an amount of 0.2 times the amount of the dye-donor substance, and the dye-donor substance and the electron donor were used and dispersed in oil according to the method of Example 1.

Photosensitive materials 202 to 206 having exactly the same composition as 201 except that additives are added to the photosensitive material 201 as shown in [Table 6].
Was created respectively.

Next, a method for producing the dye fixing material (R-2) will be described.

Poly (methyl acrylate-co-N, N, N-trimethyl-
10 g of N-vinylbenzylammonium chloride) (the ratio of methyl acrylate to vinylbenzylammonium chloride was 1: 1) was dissolved in 200 ml of water and uniformly mixed with 100 g of 10% lime-processed gelatin. A hardener was added to this mixed solution, and the mixture was uniformly coated on a paper support laminated with polyethylene in which titanium dioxide was dispersed, to a wet film thickness of 90 μm. After drying this sample, it is used as a dye fixing material (R-2) having a mordant layer.

The light-sensitive material was exposed in the same manner as in Example 1 and then uniformly heated on a heat block heated to 140 ° C. for 30 seconds.

After supplying 20 ml of water per 1 m ² to the film surface side of the dye fixing material (R-2), the above light-sensitive materials which had been subjected to the heat treatment were superposed on the fixing material so that the film surfaces were in contact with each other.

After passing through a laminator heated to 80 ° C. at a linear speed of 12 mm / sec, the two materials were peeled off, and both photosensitive materials obtained positive S / N images on the dye fixing material.

Dmax of each color of cyan, magenta, and yellow in gray part,
The results of measuring Dmin are shown in [Table 7].

As shown in [Table 7], in the light-sensitive materials 203 to 206 of the present invention, an image with lower stain was obtained as compared with the light-sensitive materials 201 and 202.

Example 3 A method for preparing a silver halide emulsion for the fifth layer and the first layer will be described.

600 ml of an aqueous solution containing sodium chloride and potassium bromide in a well-stirred aqueous gelatin solution (containing 20 g of gelatin and 3 g of sodium chloride in 1,000 ml of water and kept at 75 ° C) and an aqueous solution of silver nitrate (600 ml of water and silver nitrate) 0.59 mol dissolved) was added simultaneously at an equal flow rate over 40 minutes. Thus, a monodisperse cubic silver chlorobromide emulsion (50 mol% of bromine) having an average grain size of 0.40 μm was prepared.

After washing with water and desalting, 5 mg of sodium thiosulfate and 20 mg of 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene were added, and chemical sensitization was performed at 60 ° C. Emulsion yield is 60
It was 0g.

Next, how to prepare a silver halide emulsion for the third layer will be described.

600 ml of an aqueous solution containing sodium chloride and potassium bromide in a well-stirred aqueous gelatin solution (containing 20 g of gelatin and 3 g of sodium chloride in 1,000 ml of water and kept at 75 ° C) and an aqueous solution of silver nitrate (600 ml of water and silver nitrate) 0.59 mol dissolved) was added simultaneously at an equal flow rate over 40 minutes. Thus, a monodisperse cubic silver chlorobromide emulsion (bromine 80 mol%) having an average grain size of 0.35 μm was prepared.

After washing with water and desalting, 5 mg of sodium thiosulfate and 20 mg of 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene were added, and chemical sensitization was performed at 60 ° C. Emulsion yield is 60
It was 0g.

 A method for preparing a benzotriazole silver emulsion will be described.

28 g of gelatin and 13.2 g of benzotriazole were dissolved in 300 ml of water. This solution was kept at 40 ° C. and stirred. A solution prepared by dissolving 17 g of silver nitrate in 100 ml of water was added to this solution over 2 minutes.

The pH of this benzotriazole silver emulsion was adjusted and allowed to settle to remove excess salt. Then adjust the pH to 6.30,
A yield of 400 g of benzotriazole silver emulsion was obtained.

 Described below is how to make an acetylene silver emulsion.

20 g of gelatin and 4.6 g of 4-acetylaminophenylacetylene were dissolved in 1000 ml of water and 200 ml of ethanol. This solution was kept at 40 ° C. and stirred. Add 4.5 g of silver nitrate to this solution with water.
A solution dissolved in 200 ml was added over 5 minutes. PH of this dispersion
Was adjusted and settled to remove excess salt. After this, adjust the pH
According to 6.3, a yield of 300 g of an acetylene silver compound dispersion was obtained.

Next, a method for preparing a gelatin dispersion of a dye-donor substance will be described.

Yellow dye-providing substance (3) ^* 5 g, auxiliary developing agent (a) 0.2 g, antifoggant (b) 0.2 g, and succinic acid-2-ethyl-hexyl ester sodium sulfonate 0.5 g as a surfactant. g and 2.5 g of triisononyl phosphate were weighed, 30 ml of ethyl acetate was added, and the mixture was heated and dissolved at about 60 ° C. to obtain a uniform solution. This solution was mixed with 100 g of a 3% solution of lime-processed gelatin with stirring, and then 10 with a homogenizer.
It was dispersed at 10000 rpm for 1 minute. This dispersion is called a yellow dye-donor substance dispersion.

A dispersion of the magenta dye-donor substance (5) ^* was prepared in the same manner as above except that 2.5 g of tricresyl phosphate was used as the high-boiling solvent.

A cyan dye-donor dispersion (6) ^* was prepared in the same manner as the yellow dye-dispersion.

From these, a photothermographic material 301 having a multilayer structure as shown in the following table was produced. [Table 8] Next, the coating layers A to E shown in Example 1 were applied to the photosensitive material 30
Photosensitive materials 302 to 306 having exactly the same composition as 301 were prepared, respectively, except that coating was carried out under the coating layer of No. 1 as shown in [Table 9].

Tungsten bulbs are used for the light-sensitive materials 301 to 306 prepared in this way, and the density of the G, R, and IR three-color separation filters (G is 500 to 600 nm, R is 600 to 700 nm) is continuously changing. The film was exposed for 1 second at 500 lux through a filter, IR was constructed by using a filter having a transmission of 700 nm or more).

12 ml / m ² of water was supplied to the emulsion surface of the exposed photothermographic material with a wire bar, and then the dye fixing material R-1 was used.
Was superposed so that the film surface was in contact with.

Using a heat roller whose temperature has been adjusted so that the water-absorbed film has a temperature of 88 and 98 ° C., the dye fixing material is peeled from the photosensitive material after heating for 30 seconds, and G, R,
Clear images of yellow, magenta, and cyan were obtained corresponding to the IR three-color separation filter.

 The results of measuring Dmax / Dmin of each color are shown in [Table 10].

Claims (2)

[Claims] 1. A support having at least a photosensitive silver halide, a binder, and a dye-donor compound which releases or forms a diffusible dye corresponding to or against a reaction in which silver halide is reduced to silver. In a heat-developable color light-sensitive material, an adsorptive substance having a property of adsorbing a colored substance generated during image forming processing of the light-sensitive material, such as activated carbon, cation exchange resin, anion exchange resin, silica gel, alumino silica gel, active A heat-developable color photosensitive material having a hydrophilic binder layer containing at least one selected from alumina. 2. A hydrophilic binder layer containing the adsorptive substance, wherein the diffusible dye released or formed after the imagewise exposure of the heat-developable color light-sensitive material according to claim 1 is heated or released at the same time. An image forming method, which comprises transferring to another dye fixing layer.