JP2700739B2 - Dye fixing element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dye-fixing element in a method of forming a color image imagewise by development, particularly heat development, and transferring the image to a dye-fixing element to form an image.

[0002]

2. Description of the Related Art A photographic method using silver halide is superior in photographic characteristics such as sensitivity and gradation control to other photographic methods, for example, electrophotography and diazo photographic methods. Used. In recent years, a technology has been developed that can easily and quickly obtain images by changing the image forming processing method for photosensitive materials using silver halide from wet processing using a conventional developer or the like to dry processing using heating or the like. Have been. Many methods have been proposed for obtaining a color image (color image) by thermal development. A method of forming a color image by combining an oxidized form of a developing agent and a coupler is described in U.S. Pat.
No. 761,270, Belgian Patent No. 802,519 and Research Disclosure Magazine, September 31, 1975.
Page 32, US Pat. No. 4,021,240. In such a method, since the image of reduced silver and the color image are simultaneously formed in the heat development exposed portion, there is a disadvantage that the color image becomes turbid.

In order to improve these drawbacks, a movable (diffusible) dye is formed or released imagewise by heating, and the movable dye is transferred to a dye fixing element having a mordant with a solvent such as water. A method of transferring to a dye-fixing element with a high-boiling organic solvent, a method of transferring to a dye-fixing element with a hydrophilic heat solvent incorporated in the dye-fixing element, the movable dye is heat-diffusible or sublimable, Methods of transferring to a dye receiving element such as a support have been proposed (U.S. Pat. Nos. 4,463,079 and 4,474,8).
Nos. 67, 4,478,927 and 4,507,38
No. 0, 4,500,626, 4,483,914
Nos. JP-A-58-149046 and JP-A-58-14904.
No. 7, 59-152440, 59-154445
No., 59-165,054, 59-180,548
Nos. 59-168439 and 59-174832
Nos. 59-174833 and 59-174834
No. 59-174835).

In such an image forming method, a part or all of a base or a base precursor is incorporated in a dye-fixing layer of a dye-fixing element or / and a layer adjacent to the dye-fixing element (surface side), particularly for simplifying development processing. It is effective to form an image by thermal development. The dye fixing element is usually provided with a layer made of a hydrophilic binder as a curl balance layer on the back side (also called the back side). When such a dye-fixing element is laminated and stored under high humidity, the base or / and base precursor on the surface side partially migrates to the back surface side, and uneven distribution of the base or base precursor on the surface side occurs. Occurs. As a result, when the development transfer is performed while being superimposed on the photosensitive element, the development transfer becomes non-uniform, so that a white color-like non-uniformity occurs in the transferred color image (hereinafter, this is referred to as “white-color non-uniformity”). In order to solve this problem, the present inventors have previously proposed a dye fixing element in which fine particles having a size larger than the thickness of the back layer are contained in the back layer in JP-A-63-279542.

[0005]

The above-mentioned method has a remarkable effect on "white spot unevenness". However, the effect is not necessarily obtained when stored for a long time under a high humidity condition and under a pressure. Not enough, and further improvements were desired.
In particular, when used for transmission, there is a limit to the amount of fine particles to be added in terms of transparency (haze degree). Therefore, development of a method for improving "white spot unevenness" without lowering transparency has been desired. . Therefore, the first object of the present invention is to provide a “white spot unevenness” even when stored for a long time in a pressurized state under high humidity.
The purpose of the present invention is to provide a dye-fixing element which does not cause the phenomenon. A second object of the present invention is to provide excellent transparency and "white spot unevenness".
The purpose of the present invention is to provide a dye-fixing element which does not cause the phenomenon.

[0006]

The above and other objects are achieved by the present invention described below. That is, at least a photosensitive element containing a photosensitive silver halide, a hydrophilic binder and a dye-donating compound that releases a diffusible dye corresponding to or inversely corresponding to the exposure amount, after imagewise exposure or simultaneously with imagewise exposure, In a dye-fixing element having a dye-fixing layer to which a diffusible dye generated or released by developing in the presence of a base and / or a base precursor is transferred and fixed, said dye provided on one surface (surface) Polyvinyl alcohol containing a base or / and / or a base precursor in a fixed layer or / and an adjacent layer thereof, and at least the outermost layer on the opposite surface (back surface) is crosslinked with boric acid or / and a salt thereof. This was achieved by a dye-fixing element characterized by being composed of a layer containing a main component.

The dye-fixing element of the present invention is used in a photographic material using a photosensitive silver halide to form or release a diffusible dye as a result of the development of the silver halide. This is an application to be used as an image receiving material in a method of transferring an image to a material to obtain an image. This image forming system is roughly classified into a so-called wet color diffusion transfer system in which development is performed using a processing solution at around normal temperature, and a heat development diffusion transfer system in which development is performed by thermal development. Since it is preferably used for the development diffusion transfer method,
This will be described in detail below, but this description can be applied in common to the wet color diffusion transfer system except for parts unique to thermal development such as an organic silver salt and a development system.

[0008] "White spot unevenness" of such a dye fixing element.
Various studies were conducted on the hydrophilic binder used on the back surface side of the dye-fixing element in order to prevent the occurrence of “white spot unevenness” by providing at least the outermost layer with a layer containing polyvinyl alcohol as a main component. It was found to be significantly improved. Further, the effect is further improved by making all the layers on the back surface side a layer mainly composed of polyvinyl alcohol. In general, when the water-soluble polymer layers are simultaneously coated at a high speed, particularly in the case of multi-layer coating, the aqueous solution of the binder of the layers constituting these layers is gelled (set) at a low temperature and dried at a low temperature to a normal temperature. Gelatin has been usually used as a binder having a property of gelling at such a low temperature, but it is not preferable because "white spot unevenness" occurs as described above. However, since the aqueous solution of polyvinyl alcohol does not have a property of gelling at low temperature, it cannot be set and dried. That is, multi-layer simultaneous application cannot be performed. Then, as a result of examining the low-temperature gelation (set drying property) of the aqueous polyvinyl alcohol solution, it was found that by adding boric acid and / or a salt thereof in an appropriate amount, set drying could be performed, and thus simultaneous multilayer coating was possible.

In the present invention, it is not necessary that all layers on the back surface side be polyvinyl alcohol, and the lower layer may be a gelatin layer and the outermost layer may be a layer composed of polyvinyl alcohol and boric acid or / and a salt thereof. Preferably, all layers on the back surface side are layers composed of polyvinyl alcohol and boric acid or / and salts thereof. Examples of the boric acid and / or a salt thereof used in the present invention include orthoborate, diborate, metaborate, tetraborate, pentaborate and octaborate. The amount of boric acid and / or a salt thereof used in the present invention varies depending on the degree of saponification and the degree of polymerization of the polyvinyl alcohol used and the concentration of the aqueous solution thereof. For example, PVA105 (98% saponification degree,
Polymerization degree 500, made by Kuraray) and PVA120 (saponification degree 98)
%, Degree of polymerization 2000, manufactured by Kuraray Co., Ltd.), the concentration of borate and the temperature / viscosity curve are shown in FIG. As described above, the viscosity of the aqueous solution of polyvinyl alcohol varies depending on the type (degree of saponification, degree of polymerization) of the polyvinyl alcohol used and the concentration of the aqueous solution.
If the amount of borate added is adjusted so as to be 200 cp or less at 0 ° C. and 500 cp or more at 10 ° C., set drying becomes possible.

The dye-fixing element (hereinafter, also referred to as "dye-fixing material" or "image-receiving material") of the present invention is a color photosensitive element (hereinafter, referred to as "photosensitive material") at least when a diffusible dye is transferred.
(Also referred to as "photothermographic material" or "photosensitive element"). That is, the dye-fixing element is placed in such a relationship that the dye-fixing layer-coated surface is in face-to-face contact with the photosensitive layer-coated surface of the photosensitive element at least during the transfer of the diffusible dye. The dye-fixing element of the present invention may be in the form of being coated on a support separate from the photosensitive element, or may be in the form of being coated on the same support as the photosensitive element. The relationship between the dye fixing element and the photosensitive element, the relationship with the support, and the relationship with the dye reflection layer described in column 57 of US Pat. No. 4,500,626 can be applied to the present invention. In the present invention, the dye-fixing element is preferably provided on a support separate from the photosensitive element.

The dye-fixing element has a dye-fixing layer on a support. If necessary, auxiliary layers such as a protective layer, a release layer, an anti-curl layer and a back layer can be provided.
Particularly, it is useful to provide a protective layer and a back layer. One or more of the above layers may include a hydrophilic thermal solvent, a plasticizer, an anti-fading agent, a UV absorber, a sliding agent, a matting agent, an antioxidant, and a dispersed vinyl for increasing dimensional stability. Compounds and the like may be included.

In the present invention, the dye fixing layer contains a polymer mordant capable of fixing the mobile dye released by development. Here, the polymer mordant is
Examples of the polymer include a polymer containing a tertiary amino group, a polymer containing a nitrogen-containing heterocyclic moiety, and a polymer containing a quaternary cation group. These polymers are preferably used as a mixture with another hydrophilic polymer (eg, gelatin). Polymers containing a vinyl monomer unit having a tertiary amino group are described in JP-A Nos. 60-60643 and 60-57836, and the like. Polymers containing a vinyl monomer unit having a tertiary imidazole group are light-fast. It is particularly preferably used in terms of properties and transfer density. A specific example is disclosed in JP-A-60-1.
No. 18834, No. 60-122941, No. 62-24
Nos. 4043, 62-244036, U.S. Pat.
Nos. 282,305, 4,115,124, 3,1
No. 48,061.

Preferred specific examples of the polymer containing a vinyl monomer unit having a quaternary imidazolium salt include British Patent Nos. 2,056,101 and 2,093,041.
No. 1,594,961, U.S. Pat.
No. 386, No. 4,115,124, No. 4,273,8
No. 53, 4,450, 224, JP-A-48-282.
No. 25, etc. Preferable specific examples of the polymer containing a vinyl monomer unit having a quaternary ammonium salt are described in U.S. Pat. Nos. 3,709,690, 3,898,088, 3,958,995, No. -57836, No. 60-60643, No. 60
No. 122940, No. 60-122942 and No. 6
No. 0-235134. The molecular weight of the polymer mordant used in the present invention is preferably 1,000.
~ 1,000,000, especially 10,000 ~ 200,0
00.

The polymer mordant is used together with a hydrophilic colloid as a binder described later in a dye fixing layer (hereinafter, also referred to as “mordanting layer”) in the image receiving material. The mixing ratio of the polymer mordant and the hydrophilic colloid and the amount of the polymer mordant applied are easily determined by those skilled in the art according to the amount of the dye to be mordant, the type and composition of the polymer mordant, the applied image forming method, and the like. The mordant / hydrophilic colloid ratio is 20/80 to 80/2.
0 (weight ratio), the amount of the mordant applied is about 0.2 to about 15 g /
m ² is suitable, and it is particularly preferable to use 0.5 to 8 g / m ² .

The transfer density of a dye can be increased by using a polymer mordant in combination with a metal ion in an image receiving material. This metal ion can be added to a mordant layer containing a mordant or a layer adjacent to the mordant (which may be closer or farther to the support supporting the mordant layer or the like).
The metal ions used here are desirably colorless and stable to heat and light. That is, Cu ²⁺ , Zn
Preferred are polyvalent ions of transition metals such as ²⁺ , Ni ²⁺ , Pt ²⁺ , Pd ²⁺ , and Co ³⁺ ions, and particularly preferred is Zn ²⁺ . This metal ion is usually added in the form of a water-soluble compound, for example, ZnSO ₄ , Zn (CH ₃ CO ₂ ) ₂ , and the amount of addition is suitably about 0.01 to about 5 g / m ² , preferably 0 to 5 g / m ^2. 0.1 to 1.5 g / m ² . In the layer to which these metal ions are added, a hydrophilic polymer can be used as a binder. As the hydrophilic binder, a hydrophilic colloid as described above for the mordant layer is useful. The mordant layer containing the polymer mordant can contain various surfactants for the purpose of enhancing coatability and the like.

The image receiving material of the present invention contains a water-soluble base and / or a base precursor. Examples of the base in the present invention include inorganic bases such as hydroxides, carbonates, bicarbonates, and secondary and tertiary phosphates of alkali metals and quaternary alkyl ammoniums; aliphatic amines, aromatic amines,
Organic bases such as heterocyclic amines, amidines, cyclic amidines, guanidines, cyclic guanidines and the like, and carbonates, bicarbonates, second and third phosphates thereof, and the like. In addition, examples of the base precursor in the present invention include precursors of the organic base. The base precursor here releases a basic component by thermal decomposition or electrolysis. For example, salts of a thermally decomposable organic acid such as trichloroacetic acid, cyanoacetic acid, acetoacetic acid, α-sulfonylacetic acid and the organic base, US Pat.
No. 8,496, and salts with 2-carboxycarboxamide. Other UK Patent No. 998,94
No. 5, U.S. Pat. No. 3,220,846;
The base precursor described in No. 22625 or the like can be used.

The following compounds can be used as compounds for generating a base by electrolysis. For example, electrolysis of various fatty acid salts can be mentioned as a typical example of the method using electrolytic oxidation. By this reaction, carbonates of organic bases such as alkali metals and guanidines and amidines can be obtained extremely efficiently. Examples of the method using electrolytic reduction include: production of amines by reduction of nitro and nitroso compounds; production of amines by reduction of nitriles; p-aminophenols by reduction of nitro compounds, azo compounds, azoxy compounds, etc. Production of p-phenylenediamines and hydrazines can be mentioned. p-Aminophenols, p-phenylenediamines and hydrazines can be used not only as bases but also directly as color image forming substances.
In addition, it is of course possible to utilize generation of an alkaline component by electrolysis of water in the presence of various inorganic salts.

Further, as described in US Pat. No. 4,740,445, a metal ion constituting a sparingly soluble metal salt compound (for example, zinc oxide, basic zinc carbonate, calcium carbonate, etc.) and water are used as a medium. A method in which a compound capable of forming a complex (eg, guanidium picolinate) is reacted with the hardly soluble metal salt compound to generate a water-soluble base can also be used. In this method, a dispersion of a poorly soluble metal salt compound is contained in a light-sensitive material, and a water-soluble compound capable of forming a complex with the metal ion is contained in an image-receiving material as a base precursor. This is particularly effective in terms of storage stability with time of the photosensitive material and the image receiving material since a base can be generated during the heat treatment. The base and / or the base precursor can be used alone or in combination of two or more. The used amount of the base and / or the base precursor is 5 × 10 ^{-4 to} 5 × 10 ^-1 mol / m ² , preferably 2.5 × 10 ^{-3 to} 2.5 × 10 ^-2.
Mol / m ² .

The polymer dispersion used as an anti-curl agent in the dye-fixing element of the present invention preferably has a glass transition temperature of 25 ° C. or lower for the polymer constituting the polymer dispersion.
Even at 5 ° C. or more, substantially 25
It suffices if the temperature is lower than or equal to ° C. As a method of introducing a plasticizer into the polymer dispersion, it can be carried out in the presence of a plasticizer, but usually, it can be carried out by mixing with a plasticizer emulsion and stirring for a certain period of time. As the polymer dispersion used in the present invention, vinyl acetate, ethylene vinyl acetate, acrylic, vinylidene chloride,
Latexes synthesized by emulsion homopolymerization or emulsion copolymerization of vinyl chloride, butadiene or butadiene derivatives, or polymer dispersions obtained by dissolving and emulsifying the above polymer, polyester, polyurethane or the like in an organic solvent are exemplified. Particularly, dispersions of vinyl acetate, ethylene vinyl acetate, acrylic and styrene butadiene are preferably used from the viewpoints of light fastness, heat stability, dispersion stability of coating liquid, curl improving effect and prevention of salt precipitation. Can be

Specific examples of the polymer latex used as a curl property improving agent in the dye fixing element of the present invention are described below, but the present invention is not limited to these.
As commercially available latex and emulsion, for example, Nipol LX811, 814 manufactured by Zeon Corporation,
820 to 823, 825, 826, 842, 851, 8
52, 854, 855, 857, 860, 874, 11
0, 112, 119, 139, 206, 209, 60
0, 415A, 426, 430, 432A, 433, 4
35, 436, 438C, 472, 473, 479, 5
11, 513, 517, 518, 531, 407F, vinyl acetate-based, vinyl acetate-acrylic, acrylic ester-based, vinyl acetate-veova based, sold under the trade name of Polysol manufactured by Showa Polymer Co., Ltd. Various latexes or emulsions of styrene / acrylic type, ethylene / vinyl acetate type, VONDIC 1040, 105 manufactured by Dainippon Ink and Chemicals
0, 1310F, 1320NS, 1340, 1510,
1610NS, 1612NS, 1640, 1660, 1
670 (N), 1930N, 1980, and the like. The addition amount of the polymer latex is defined as a ratio of the total volume of the polymer in the latex added to the layer to the total volume of the hydrophilic binder in the addition layer, and is preferably 5 to 5.
300 vol%, more preferably 10 to 200 v
ol%. When the content is 5 vol% or less, the effect of preventing cracking is small, and when the content is 300 vol% or more, the film strength is weak and the glossiness of the surface tends to decrease. In terms of the coating amount, the weight of the polymer in the latex is preferably 0.5 g / m ² to 0.5 g / m ² .
10 g / m ² , more preferably 1 g / m ^{2 to} 5 g
/ M ² . The effect of the polymer latex used in the present invention is remarkable when a polymer mordant having a high glass transition point, particularly a mordant having a glass transition temperature of 25 ° C. or higher is used.

The photosensitive element used in combination with the dye-fixing element of the present invention may be one which is wet-processed at around normal temperature,
Heat development may be used, but the latter is preferred because the effect of the present invention is more remarkably exhibited when the dye fixing element of the present invention is used in combination. The photosensitive element basically has a photosensitive silver halide, a dye-donating compound (which may also serve as a reducing agent as described later) and a binder on a support, and further, if necessary, an organometallic hydrochloric acid. An agent or the like can be contained. These components are often added to the same layer, but may be added separately to another layer if they can react. For example, if a coloring dye-providing compound is present in the lower layer of the silver halide emulsion, the sensitivity can be prevented from lowering. The reducing agent is preferably incorporated in the photosensitive element, but may be supplied from the outside by, for example, a method of diffusing from a dye fixing element 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 having photosensitivity in different spectral regions are used in combination. . For example, there are a combination of three layers of a blue-sensitive layer, a green-sensitive layer, and a red-sensitive layer, and a combination of a green-sensitive layer, a red-sensitive layer, and an infrared-sensitive layer. Each photosensitive layer can adopt various arrangement orders known for ordinary type color photosensitive materials. Each of these photosensitive layers may be divided into two or more layers as necessary. In photothermographic materials,
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 can be provided.

The silver halide which 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 light fogging. Further, a so-called core-shell emulsion having a different phase between the inside of the grain and the grain surface layer may be used. The silver halide emulsion may be monodispersed or polydispersed, or a mixture of monodispersed emulsions may be used. The particle size is preferably from 0.1 to 2 μm, particularly preferably from 0.2 to 1.5 μm. The crystal habit of silver halide grains is cubic, octahedral,
It may be a tetradecahedron, a flat plate with a high aspect ratio, or any other. Specifically, U.S. Pat. Nos. 4,500,626, column 50, 4,628,021, and Research Disclosure Magazine (hereinafter abbreviated as RD) 17029 (1)
978), and any of the silver halide emulsions described in JP-A-62-253159 can be used.

The silver halide emulsion may be used as it is after unripe, but usually it is used after chemical sensitization. A known sulfur sensitization method, reduction sensitization method, noble metal sensitization method, selenium sensitization method, or the like can be used alone or in combination for an emulsion for a conventional light-sensitive material. These chemical sensitizations can also be carried out in the presence of a nitrogen-containing heterocyclic compound (JP-A-62-25315).
No. 9). 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.

The silver halide used in the present invention may be spectrally sensitized with a methine dye or the like. 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, and JP-A-59-180550.
No. 60-140335, RD17029 (197
8 years), sensitizing dyes described on pages 12 to 13 and the like.
These sensitizing dyes may be used alone or in combination, and the combination of sensitizing dyes is often used particularly for supersensitization. Along with the sensitizing dye, a dye which has no spectral sensitizing effect or a compound which does not substantially absorb visible light and exhibits supersensitization may be contained in the emulsion (for example, US Pat. , 615, 641, and JP-A-63-23145). These sensitizing dyes may be added to the emulsion at or before or after chemical ripening, or according to U.S. Pat. Nos. 4,183,756 and 4,225,666 before and after nucleation of silver halide grains. Good. The addition amount is generally about 10 ^-8 to 10 ^-2 mol per mol of silver halide.

When the dye fixing element of the present invention is used in a heat development system, an organic metal salt can be used in combination with a photosensitive silver halide as an oxidizing agent in the photosensitive element. Among such organic metal salts, an organic silver salt is particularly preferably used. Organic compounds that can be used to form the above-mentioned organic silver salt oxidizing agent include benzotriazoles, fatty acids and other compounds described in U.S. Pat. No. 4,500,626, columns 52-53. Also, JP-A-60-11323
A silver salt of a carboxylic acid having an alkynyl group such as silver phenylpropiolate described in No. 5;
Acetylene silver described in No. 44 is also useful. Organic silver salt is 2
More than one species may be used in combination. The above organic silver salts can be used in an amount of 0.01 to 10 mol, preferably 0.01 to 1 mol, per mol of the photosensitive silver halide. The total coating amount of the photosensitive silver halide and the organic silver salt is suitably from 50 mg to 10 g / m ² in terms of silver.

In the present invention, various antifoggants or photographic stabilizers can be used. Examples thereof include azoles and azaindenes described in RD17643 (1978), pp. 24-25, and JP-A-59-1684.
No. 42 nitrogen-containing carboxylic acids and phosphoric acids,
Alternatively, a mercapto compound and a metal salt thereof described in JP-A-59-111636, an acetylene compound described in JP-A-62-87957, and the like are used.

As the reducing agent used in the present invention, those known in the field of photosensitive materials can be used. Further, a dye-providing compound having a reducing property described later is also included (in this case, another reducing agent may be used in combination). Further, a reducing agent precursor which does not itself have a reducing property but expresses a reducing property by the action of a nucleophilic reagent or heat during the development process can be used. Examples of the reducing agent used in the present invention include columns 49 to 50 of U.S. Pat. No. 4,500,626 and Nos. 30 to 3 of U.S. Pat. No. 4,483,914.
Column 1, No. 4,330,617, No. 4,590,152
Nos. (17) to (1) of JP-A-60-140335.
8), p. 57-40245, p. 56-138736
No. 59-178458, No. 59-53831,
No. 59-182449, No. 59-182450, No. 60-119555, No. 60-128436 to No. 60-128439, No. 60-198540,
Nos. 60-181742, 61-259253, 62-244444, 62-131253 to 62-131256, European Patent 220,746.
There are reducing agents and reducing agent precursors described in A2, pp. 78-96. Various combinations of reducing agents, such as those disclosed in U.S. Pat. No. 3,039,869, can also be used.

When a diffusion-resistant reducing agent is used, an electron transfer agent or / and / or an electron transfer agent may be used, if necessary, in order to promote electron transfer between the diffusion-resistant reducing agent and the developable silver halide.
And an electron transfer agent precursor can be used in combination. The electron transfer agent or its precursor can be selected from the above-mentioned reducing agents or its precursors. It is desirable that the electron transfer agent or its precursor has a higher mobility than 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) to be used in combination with the electron transfer agent may be any one which does not substantially move in the layer of the light-sensitive material among the aforementioned reducing agents, and is preferably a hydroquinone, Sulfonamidophenols, sulfonamidonaphthols, compounds described as electron donors in JP-A-53-110827, and non-diffusible and reducible dye-providing compounds described later. In the present invention, the reducing agent is added in an amount of 0.1 to 1 mol of silver.
001 to 20 mol, particularly preferably 0.01 to 10 mol.

In the present invention, a compound capable of forming or releasing a movable dye corresponding to or opposite to the exposure dose, that is, a dye-donating compound is used. First, 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. Further, a 2-equivalent coupler which has a diffusion-resistant group as a leaving group and forms a diffusible dye by an oxidative coupling reaction is also preferable. The diffusion resistant group may form a polymer chain. Specific examples of color developers and couplers are described in T.W. H. James "The The
Theory of the Photographic
Process, 4th Edition, pp. 291-334 and 35
4-361 pages, JP-A-58-123533, 58-123.
No. 149046, No. 58-149047, No. 59-1
Nos. 11148, 59-124399, 59-17
No. 4835, No. 59-231439, No. 59-231
No. 540, No. 60-2950, No. 60-2951,
Nos. 60-14242, 60-23474, 60
-66249 and the like.

As another example of the dye donating compound,
Compounds 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) _n -Z [LI] Dye represents a dye group, a temporarily shortened dye group or a dye precursor group, Y represents a simple bond or linking group, and Z represents an image-like latent image. (Dye-Y) _n -Z corresponding to or opposite to the photosensitive silver salt having the formula (I), or Dye is released, and the released Dye and (Dye- Y) represents a group having a property that causes a difference in diffusibility with _n- Z, n represents 1 or 2, and when n is 2, two Dy
eY may be the same or different. General formula [LI]
Specific examples of the dye-donating compound represented by are the following compounds. In addition, the following ~
Is to form a diffusible dye image (positive dye image) corresponding to the development of silver halide, and is to form a diffusible dye image (negative dye image) corresponding to the development of silver halide.
Is formed.

Nos. 3,134,764, 3,362,819, 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 developer is diffusible in an alkaline environment, but becomes non-diffusible when reacted with silver halide. As described in U.S. Pat. No. 4,503,137, non-diffusible compounds which release a diffusible dye in an alkaline environment but lose their ability when reacted with silver halide can also be used. Examples include U.S. Pat.
Compounds which release a diffusible dye by an intramolecular nucleophilic substitution reaction described in U.S. Pat.
Compounds which release a diffusible dye by an intramolecular reversal reaction of an isoxazolone ring described in JP-A No. 354 or the like.

US Pat. No. 4,559,290, EP 220,746 A2, US Pat. No. 4,783,
No. 396, JP-A-87-6199, etc., a non-diffusible compound which reacts with a reducing agent remaining without being oxidized by development to release a diffusible dye can also be used.
Examples thereof include U.S. Pat. Nos. 4,139,389 and 4,139,379, JP-A-59-185333,
Compounds which release a diffusible dye by a nucleophilic substitution reaction in the molecule after reduction described in, for example, JP-A-57-84453, U.S. Pat.
-101649, 61-88257, RD240
No. 25 (1984), etc., compounds which release a diffusible dye by an intramolecular electron transfer reaction after reduction, West German Patent No. 3,008,588A, JP-A-56-1984.
No. 142,530, U.S. Pat. Nos. 4,343,893 and 4,619,884, compounds which release a diffusible dye by cleavage of a single bond after reduction, U.S. Pat. Examples include a nitro compound which releases a diffusible dye after electron acceptance described in US Pat. No. 223 and the like, and a compound which releases a diffusible dye after electron acceptance described in US Pat. No. 4,609,610 and the like.

Further, as more preferable, European Patent No. 220,746A2, JP-A-87-6199, US Pat. No. 4,783,396, and JP-A-63-2016
No. 53, 63-201654 and the like, compounds having an NX bond (X represents an oxygen, sulfur or nitrogen atom) and an electron-withdrawing group in one molecule, JP-A-1-268
No. 42, a compound having an SO ₂ —X (X is as defined above) and an electron-withdrawing group in one molecule.
No. 71344 describes that a PO-X bond (X
Has the same meaning as described above) and a compound having an electron-withdrawing group, C-X 'in one molecule described in JP-A-63-271341.
Compounds having a bond (X ′ has the same meaning as X or represents —SO ₂ —) and an electron-withdrawing group are exemplified. Also, Japanese Patent Application Laid-Open
Compounds disclosed in JP-A-161237 and JP-A-1-161342, in which a single bond is cleaved after reduction by a π bond conjugated to an electron-accepting group to release a diffusible dye, can also be used. Among them, a compound having an NX bond and an electron-withdrawing group in one molecule is particularly preferable. Examples are EP 220,746 A2 or US Pat. No. 4,783,3.
No. 96, compounds (1) to (3), (7) to
(10), (12), (13), (15), (23)-
(26), (31), (32), (35), (36),
(40), (41), (44), (53)-(59),
(64), (70) and compounds (11) to (23) described in Published Technical Report 87-6199.

Compounds which have a diffusible dye as a leaving group and release a diffusible dye upon reaction with an oxidized reducing agent (DDR coupler). Specifically, British Patent No. 1,330,524, JP-B-48-39165, U.S. Patent Nos. 3,443,940 and 4,474,867
No. 4,483,914 and the like. Is reducible to silver halides or organic silver salts,
A compound that releases a diffusible dye when the partner is reduced (DR
R compound). Since this compound does not need to use another reducing agent, it is preferable because there is no problem of image contamination due to oxidized decomposition products of the reducing agent. A representative example is U.S. Pat.
8,312, 4,053,312, 4,05
Nos. 5,428 and 4,336,322,
Nos. 65839, 59-69839 and 53-381
9, No. 51-104343, RD17465, U.S. Pat. Nos. 3,725,062 and 3,728,113
No. 3,443,939 and JP-A-58-11653.
7, No. 57-179840, U.S. Pat.
0,626 and the like. Specific examples of the DRR compound include the compounds described in the aforementioned U.S. Pat. No. 4,500,626, columns 22 to 44. Among them, the compounds (1) to
(3), (10) to (13), (16) to (19),
(28)-(30), (33)-(35), (38)-
(40), (42) to (64) are preferred. The compounds described in U.S. Pat. No. 4,639,408, columns 37 to 39 are also useful. Other examples of the above-mentioned couplers and dye-donating compounds other than the general formula [LI] include dye silver compounds obtained by combining an organic silver salt and a dye (Research Disclosure Magazine, May 1978, pages 54 to 58, etc.); Azo dyes used in the heat-developed silver dye bleaching method (U.S. Pat.
35,957, Research Disclosure Magazine, 1
And a leuco dye (US Pat. Nos. 3,985,565 and 4,022,617) can also be used.

A hydrophobic additive such as a dye-donating compound or a nondiffusible reducing agent can be introduced into a layer of a light-sensitive material by a known method such as the method described in US Pat. No. 2,322,027. In this case, Japanese Patent Application Laid-Open No. 59-83154
Nos. 59-178451 and 59-178452
Nos. 59-178453 and 59-178454
And high-boiling organic solvents described in JP-A-59-178455, JP-A-59-178457, and the like, if necessary, in combination with a low-boiling organic solvent having a boiling point of 50 ° C to 160 ° C. The amount of the high boiling point organic solvent is 10 g or less, preferably 5 g per 1 g of the dye-donating compound used.
It is as follows. Further, 1 cc or less, more preferably 0.5 cc or less, particularly 0.3 cc or less is suitable for 1 g of the binder. JP-B-51-39853, JP-A-51-59
A dispersion method using a polymer described in No. 943 can also be used. In the case of a compound which is substantially insoluble in water, it can be dispersed and contained as fine particles 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, those mentioned as surfactants on pages (37) to (38) of JP-A-59-157636 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. Specific compounds preferably used are described in U.S. Pat.
No. 0,626, columns 51 to 52.

As the binder for the constituent layers of the photosensitive material and the dye fixing material, hydrophilic binders are preferably used. Examples thereof include pages (26) to (2) of JP-A-62-253159.
8) Those described on page 8 are mentioned. Specifically, transparent or translucent hydrophilic binders are preferred, for example, gelatin, proteins or cellulose derivatives such as gelatin derivatives, starch, gum arabic, dextran, natural compounds such as polysaccharides such as pullulan, polyvinyl alcohol, Examples include polyvinylpyrrolidone, acrylamide polymers, and other synthetic polymer compounds. Further, a superabsorbent polymer described in JP-A-62-245260, that is, a homopolymer of a vinyl monomer having —COOM or —SO ₃ M (M is a hydrogen atom or an alkali metal), or those vinyl monomers or other vinyl monomers. (For example, sodium methacrylate, ammonium methacrylate, Sumikagel L-5H manufactured by Sumitomo Chemical Co., Ltd.) may also be used. These binders can be used in combination of two or more kinds.

When a system for performing thermal development by supplying a small amount of water is employed, the use of the above superabsorbent polymer makes it possible to rapidly absorb water. When the superabsorbent polymer is used for the dye-fixing layer and its protective layer, it is possible to prevent the dye from being re-transferred from the dye-fixing material to another after transfer. In the present invention,
The coating amount of the binder is preferably 20 g or less, more preferably 10 g or less, and even more preferably 7 g or less per 1 m ² .

US Pat. No. 4,678,739 No. 4 discloses a hardening agent used in a constituent layer of a photosensitive material or a dye fixing material.
Column 1, JP-A-59-116655, JP-A-62-2452
No. 61, No. 61-18942 and the like. More specifically, aldehyde hardeners (such as formaldehyde), aziridine hardeners, epoxy hardeners, and vinyl sulfone hardeners (N, N'-ethylene-
Bis (vinylsulfonylacetamide) ethane, etc.), N
-Methylol-based hardeners (such as dimethylol urea) and polymer hardeners (compounds described in JP-A-62-234157). Among the above hardeners, applicability (that is, stability with time of dissolution of a coating solution and reactivity with an adjacent layer at the time of application), film quality (such as stability with time of raw sample and hardening property of raw sample) and photographic properties From the viewpoint of (transfer density and the like), an epoxy hardener is particularly preferred. Specific examples of the epoxy hardener include hardeners described in JP-A-62-91942.

In the present invention, an image formation accelerator can be used in the light-sensitive material and / or the dye-fixing material. Examples of the image formation accelerator include the promotion of a redox reaction between a silver salt oxidizing agent and a reducing agent, the promotion of a reaction such as the generation of a dye from a dye-providing substance or the decomposition or release of a diffusible dye, and the use of a photosensitive material layer. From the physicochemical function to bases or base precursors, nucleophilic compounds, high-boiling organic solvents (oils), thermal solvents, surfactants, silver Or, it is classified into a compound having an interaction with silver ions. However, these substance groups generally have a composite function and usually have some of the above-mentioned promoting effects. Details of these are described in U.S. Pat. No. 4,678,739, columns 38-40.

In the present invention, various development stopping agents can be used in the light-sensitive material and / or the dye-fixing material for the purpose of always obtaining a constant image with respect to fluctuations in processing temperature and processing time during development. As used herein, the term "development terminator" refers to a compound that neutralizes a base or reacts with a base immediately after appropriate development to reduce the base concentration in the film and to stop development by interacting with a compound or silver and silver salt to suppress development. Compound. Specific examples 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. For further details, see JP-A-62-25
No. 3159, pages (31) to (32).

The constituent layers (including the back layer) of the light-sensitive material or the dye-fixing material are used for the purpose of improving film physical properties such as dimensional stability, curl prevention, adhesion prevention, film crack prevention and pressure increase / decrease sensation. Various polymer latexes can be included. Specifically, any of the polymer latexes described in JP-A Nos. 62-245258, 62-136648, and 62-110066 can be used. Especially,
When a polymer latex having a low glass transition point (40 ° C. or less) is used for the mordant layer, cracking of the mordant layer can be prevented, and when a polymer latex having a high glass transition point is used for the back layer, a curl preventing effect can be obtained. .

In the constituent layers of the light-sensitive material and the dye-fixing material, a plasticizer, a slipping agent, or a high-boiling organic solvent can be used as an agent for improving the releasability of the light-sensitive material and the dye-fixing material. Specific examples include (2) of JP-A-62-253159.
5), pages 62-245253 and the like. Further, for the above purpose, various silicone oils (all silicone oils from dimethyl silicone oil to modified silicone oil obtained by introducing various organic groups into dimethyl siloxane) can be used. Examples thereof include various modified silicone oils described in Technical Data P6-18B issued by Shin-Etsu Silicone Co., Ltd., particularly carboxy-modified silicone (trade name X).
-22-3710) are effective. In addition, JP
Silicone oils described in JP-A-2155953 and JP-A-63-46449 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, coumaran compounds, phenol compounds (eg, hindered phenols), hydroquinone derivatives, hindered amine derivatives, and spiroindane compounds. The compounds described in JP-A-61-159644 are also effective. Examples of ultraviolet absorbers include benzotriazole-based compounds (such as U.S. Pat. No. 3,533,794), 4-thiazolidone-based compounds (such as U.S. Pat. No. 3,352,681),
Benzophenone compounds (JP-A-46-2784, etc.), and JP-A-54-48535, 62-13
Nos. 6641 and 61-88256. Further, ultraviolet absorbing polymers described in JP-A-62-260152 are also effective. Examples of metal complexes include U.S. Pat. Nos. 4,241,155, 4,245,018, columns 3 to 36, 4,254,195, columns 3 to 8, JP-A-62-174741, and JP-A-62-174741. 61-88256 (2
7) to (29), JP-A-63-199248,
-75568 and 1-74272.

Examples of useful discoloration inhibitors are described in JP-A-62-21.
No. 5272, pages (125) to (137). An anti-fading agent for preventing 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 outside such as a photosensitive material. . The above antioxidants, ultraviolet absorbers, and metal complexes may be used in combination with each other. A fluorescent whitening agent may be used for the photosensitive material and the dye fixing material. In particular, whether the dye-fixing material contains a fluorescent whitening agent,
It is preferable to supply from the outside such as a photosensitive material. As an example, K.K. Edited by Weenkataraman "Th
e Chemistry of Synthetic D
yes ", Vol. V, Chapter 8, and JP-A-61-143752. 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.

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 slipperiness, antistatic, acceleration of development and the like. Specific examples of the surfactant are described in JP-A-62-173463.
And No. 62-183457.

A matting agent can be used for the surface layer and / or the back layer of the light-sensitive material and the dye-fixing material. Matting agents such as silicon dioxide, polyolefin or polymethacrylate are disclosed in JP-A-61-88256 (29).
In addition to the compounds described on the page, benzoguanamine resin beads,
There are compounds described in JP-A-63-274944 and JP-A-63-274952, such as polycarbonate resin beads and AS resin beads. In addition, the constituent layers of the light-sensitive material and the dye-fixing material may contain a heat solvent, an antifoaming agent, an antibacterial and antibacterial agent, colloidal silica and the like. Specific examples of these additives are described in JP-A-61-88256, pages (26) to (32).

In the present invention, as the support for the light-sensitive material and the dye-fixing material, those which can withstand the processing temperature are used. Generally, paper, synthetic polymer (film)
Is mentioned. Specifically, polyethylene terephthalate, polycarbonate, polyvinyl chloride, polystyrene, polypropylene, polyimide, celluloses (for example, triacetyl cellulose) or a film containing pigment such as titanium oxide in these films, and polypropylene. For example, a mixed paper made from synthetic resin pulp such as polyethylene, a synthetic resin pulp such as polyethylene, and natural pulp, Yankee paper, baryta paper, coated paper (especially cast-coated paper), metal, cloth, glass and the like are used. These can be used alone,
It can also be used 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 and a semiconductive metal oxide such as alumina sol or tin oxide may be applied to the surface of these supports. The present invention
It is particularly useful as a dye-fixing element for transmission using a transparent support.

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

As a light source for recording an image on a photosensitive material,
As described above, light sources described in U.S. Pat. No. 4,500,626, column 56, such as natural light, tungsten lamps, light emitting diodes, laser light sources, and CRT light sources, can be used. Also, image exposure can 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 nonlinear optical material is
It is a material that can express nonlinearity between polarization and electric field that appears when a strong optical electric field such as laser light is given,
Lithium niobate, potassium dihydrogen phosphate (KDP),
Inorganic compounds typified by lithium iodate, BaB ₂ O _{4 and the} like, urea derivatives, nitroaniline derivatives such as 3
-Methyl-4-nitropyridine-N-oxide (PO
Nitropyridine-N-oxide derivatives such as M) and the compounds described in JP-A Nos. 61-53462 and 62-210432 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. The image information includes an image signal obtained from a video camera, an electronic still camera, a television signal represented by the Nippon Television Signal Standards (NTSC), and an image obtained by dividing an original image into a number of pixels such as a scanner. An image signal generated using a computer represented by a signal, CG, or CAD can be used.

The heating temperature in the heat development step varies depending on the film pH adjusted by a base or a base precursor, but can be developed at about 25 ° C. to about 250 ° C.
C. to 200.degree. C. are preferred, and especially about 70.degree. C. to about 180.degree. The dye diffusion transfer step may be performed simultaneously with the heat development, or may be performed after the heat development step. In the latter case, the heating temperature in the transfer step can be transferred within the range from the temperature in the heat development step to room temperature, but is more preferably from 50 ° C. or higher to about 10 ° C. lower than the temperature in the heat development step.

Although the transfer of the dye is caused only by heat,
Solvents may be used to promote dye transfer. Also,
As described in detail in JP-A-59-218443 and JP-A-61-238056, a method in which development and transfer are carried out simultaneously or continuously by heating in the presence of a small amount of a solvent (particularly water) is also useful. is there. In this method, the heating temperature is preferably 50 ° C. or higher and the boiling point of the solvent or lower. For example, when the solvent is water, the heating temperature is preferably 50 ° C. or higher and 100 ° C. or lower. Examples of the solvent used for promoting 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 (these bases include Those described in the section of formation accelerator are used)
Can be mentioned. In addition, a low-boiling solvent or a mixed solution of a low-boiling solvent and water or a basic aqueous solution can also 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 in a method for imparting to a dye fixing material, a photosensitive material, or both.
The amount used may be as small as not more than the weight of the solvent corresponding to the maximum swelling volume of the entire coating film (especially not more than the weight of the solvent corresponding to the maximum swelling volume of the entire coating film minus the weight of the entire coating film). As a method for imparting a solvent to the photosensitive layer or the dye fixing layer, for example, JP-A-61-147244 (2)
6) There is a method described on page. Further, the solvent can be used by being incorporated in a photosensitive material or a dye-fixing material or both in advance, for example, by enclosing a solvent in a microcapsule.

In order to promote the dye transfer, a method in which a hydrophilic thermal solvent which is solid at normal temperature and dissolves at high temperature is incorporated in the photosensitive material or the dye fixing material can be adopted. The hydrophilic heat solvent may be incorporated in either the photosensitive material or the dye fixing material, or may be incorporated in both. The layer to be incorporated may be any of an emulsion layer, an intermediate layer, a protective layer and a dye-fixing layer, but is preferably incorporated in the dye-fixing layer and / or an adjacent layer. Examples of hydrophilic thermal solvents include ureas, pyridines, amides, sulfonamides, imides, alcohols, oximes, and other heterocycles. In order to promote dye transfer, a high-boiling organic solvent may be contained in the light-sensitive material and / or the dye-fixing material.

As a heating method in the development and / or transfer step, a heated block or plate is brought into contact, or a hot plate, hot presser, heat roller, halogen lamp heater, infrared or far infrared lamp heater, or the like is contacted. Or passing through a high temperature atmosphere. Further, a resistive heating element layer may be provided on the photosensitive material or the dye fixing material, and the layer may be heated by being energized. As the heating element layer, those described in JP-A-61-145544 can be used. A pressure condition and a method of applying pressure when the photosensitive element and the dye fixing material are overlapped and brought into close contact with each other are disclosed in
The method described on page 27 of 147244 can be applied.

For processing the photographic element of the present invention, any of various heat developing apparatuses can be used. For example, JP-A-59-7
No. 5247, No. 59-177547, No. 59-181
No. 353, No. 60-18951, Shokai 62-259
An apparatus described in No. 44 or the like is preferably used.

[0057]

The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples. Example 1 A photosensitive material having the composition shown in Table 1 was prepared, and photosensitive material 1 was prepared.
01.

Photosensitive silver halide emulsion (for red-sensitive emulsion layer) A well-stirred aqueous gelatin solution (20 g of gelatin, 0.3 g of potassium bromide, 6 g of sodium chloride, and 30 mg of the following chemical A in 800 cc of water) is added. ) And the solutions (I) and (II) in Table-A below were added simultaneously at an equal flow rate over 30 minutes. After that, the following (II
Solution I) and solution (IV) were added simultaneously over 30 minutes. Three minutes after the start of the addition of the liquids (III) and (IV), a solution of a mixture of the following sensitizing dye (a) 67 mg and sensitizing dye (b) 133 mg was added. After washing with water and desalting, 22 g of lime-processed ossein gelatin was added to adjust the pH to 6.2 and the pAg to 7.7.
After adjustment to sodium thiosulfate and 4-hydroxy-
6-Methyl-1,3,3a, 7-tetrazaindene and chloroauric acid were added for optimal chemical sensitization at 60 ° C. Thus, a monodispersed cubic silver chlorobromide emulsion having an average grain size of 0.38 μm was obtained. The yield was 635 g.

[0059]

[Table 1]

[0060]

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Photosensitive silver halide emulsion (for green photosensitive layer) A well-stirred aqueous solution (gelatin 2 in 730 cc of water)
0 g, 0.30 g of potassium bromide, 6 g of sodium chloride and 0.015 g of the above-mentioned chemical A, and kept at 60.0 ° C.) for 30 minutes at the same time. Was added. Next, liquid (III) and liquid (IV)
One minute after completion of the addition, a solution of 230 mg of the following sensitizing dye (c) was added. After washing with water and desalting, add 20 g of gelatin, adjust pH and pAg, and optimally use triethylthiourea, chloroauric acid, and 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene. Was chemically sensitized. The resulting emulsion had an average grain size of 0.4
For a μm monodispersed cubic silver chlorobromide emulsion, the yield was 630 g.

[0062]

[Table 2]

[0063]

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Photosensitive Silver Halide Emulsion (for Blue Sensitive Layer) A well-stirred aqueous gelatin solution (20 g of gelatin, 3 g of potassium bromide in 800 cc of water, the above-mentioned chemical A0.03)
g and HO (CH ₂ ) ₂ S (CH ₂ ) ₂ S (CH ₂ )
Solution (I) and solution (II) shown in Table C below were added simultaneously over 30 minutes to 0.25 g of ₂ OH and kept at 50 ° C.). Thereafter, the following solution (III) and solution (IV) were simultaneously added over 20 minutes. After completion of the addition of the solution (III), a solution of the following sensitizing dye (d) 180 mg and sensitizing dye (e) 60 mg was added from 5 minutes. After washing with water and desalting, 20 g of lime-processed ossein gelatin was added to adjust the pH to 6.2,
After adjusting the pAg to 8.5, sodium thiosulfate and 4
-Hydroxy-6-methyl-1,3,3a, 7-tetrazaindene and chloroauric acid were added for optimal chemical sensitization. Thus, the monodisperse 14 having an average particle size of 0.40 μm was obtained.
600 g of a tetrahedral silver chlorobromide emulsion was obtained.

[0065]

[Table 3]

[0066]

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A method for preparing a dispersion of zinc hydroxide will be described. Zinc hydroxide 12.5 having an average particle size of 0.2 μm
g, 1 g of carboxymethylcellulose as a dispersant, 0.1 g of sodium polyacrylate in a 4% aqueous gelatin solution 10
Added to 0cc. This was pulverized by a mill using glass beads having an average particle diameter of 0.75 mm for 30 minutes, and then the glass beads were separated to obtain a dispersion of zinc hydroxide.

A method for preparing a dispersion of activated carbon will be described.
Activated carbon powder (reagent, special grade) manufactured by Wako Pure Chemical Industries, Ltd.
2.5 g, 1 g of Demol N manufactured by Kao Soap Co., Ltd. as a dispersant, and 0.25 g of polyethylene glycol nonylphenyl ether were added to 100 cc of a 5% aqueous gelatin solution, and glass beads having an average particle diameter of 0.75 mm were used in a mill. For 120 minutes. The glass beads were separated to obtain a dispersion of activated carbon having an average particle size of 0.5 μm.

A method for preparing a dispersion of an electron transfer agent will be described. 10 g of the following electron transfer agent (* 10) and polyethylene glycol nonylphenyl ether 0.1 g as a dispersant.
5 g of the following anionic surfactant 0.5 g was added to a 5% aqueous gelatin solution, and the mixture was milled for 60 minutes using glass beads having an average particle diameter of 0.75 mm. The glass beads were separated to obtain a dispersion of an electron transfer agent having an average particle size of 0.4 μm.

[0070]

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A method for preparing a gelatin dispersion of the dye-providing compound will be described. Each of yellow, magenta, and cyan was weighed according to the formulation shown in Table D below, and each was weighed to about 6
The mixture was dissolved by heating at 0 ° C. to obtain a uniform solution. This solution, 100 g of a 10% aqueous solution of lime-processed gelatin, 0.6 g of sodium dodecylbenzenesulfonate and 50 cc of water were mixed with stirring, and then mixed with a homogenizer for 10 minutes at 10,000.
Dispersed at 0 rpm. These dispersions are called gelatin dispersions of yellow, magenta and cyan dye-donating compounds.

[0072]

[Table 4]

[0073]

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[0074]

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Next, a method for preparing a gelatin dispersion of the electron donor (* 4) for the intermediate layer will be described. 23.6 g of the following electron donor (* 4) and 8.5 of the above high boiling solvent (* 2)
g was added to 30 cc of ethyl acetate and dissolved by heating at 60 ° C. to form a uniform solution. 10% of this solution and lime-processed gelatin
100 g of an aqueous solution, 0.25 g of hydrogen sulfite, 0.3 g of sodium dodecylbenzenesulfonate and 30 cc of water were stirred and mixed, and then dispersed with a homogenizer for 10 minutes at 10,000 rpm. This dispersion is called a gelatin dispersion of the electron donor (* 4).

[0076]

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[0077]

[Table 5]

[0078]

[Table 6]

[0079]

[Table 7]

[0080]

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[0081]

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Next, a method for producing the dye fixing element will be described. As shown in the following Table-E, the coating amounts of the first to third layers were applied on 100 μm PET.

[0083]

[Table 8]

[0084]

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[0085]

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Fluorescent brightener (1) 2,5-bis (5-tert-butylbenzoxazolyl (2)) thiophene water-soluble polymer (1) Sumikagel L-5-H (Sumitomo Chemical Co., Ltd.) Water-soluble polymer (2) Dextran (molecular weight 70,000) Matting agent (1) Benzoguanamine resin (average particle size 15 μm)

Further, a coating solution for the following first layer and second layer was prepared on the back surface, applied so that the wet film thickness was 35 and 15 μm, respectively, dried at 5 ° C. for 20 seconds, and further dried for 25 seconds. C., 20% RH and air flow of 10 m / min in air for 2 minutes to prepare a dye-fixing element 01. First layer: Gelatin 10% by weight aqueous solution 100 g Hardener (1) 0.8 g Second layer: Gelatin 10% by weight aqueous solution 40 g Water 52 ml 5% by weight aqueous solution of surfactant (4) 2 ml of surfactant (5) 5% by weight aqueous solution 4ml Matting agent (1) dispersion (solid content 10% by weight) 2ml

A dye-fixing element 02 was prepared in the same manner as in the dye-fixing element 01 except that the formulation of the coating solution for the second layer on the back surface was as follows. Second layer of dye fixing element 02: 10% by weight aqueous solution of PVA120 (saponification degree 98%, polymerization degree 2000, manufactured by Kuraray) 25g Water 25ml Borax 0.15% by weight aqueous solution 42ml 5% by weight of surfactant (4) Aqueous solution 2 ml 5% by weight aqueous solution of surfactant (5) 4 ml Matting agent (1) dispersion (solid content 10% by weight) 2 ml This coating solution had a viscosity of 28 cp at 40 ° C and gelled at 10 ° C.

Dye-fixing element 03 was prepared in the same manner as for dye-fixing element 02 except that the formulation of the coating solution for the first layer on the back surface was as follows. First layer of dye fixing element 03: 10% aqueous solution of PVA105 (98% saponification degree, polymerization degree 500, manufactured by Kuraray) 40g Water 10ml 0.5% borax aqueous solution 48ml 5% by weight of surfactant (4) Aqueous solution 2 ml Hardener (1) 0.8 g This coating solution had a viscosity of 16 cp at 40 ° C and gelled at 10 ° C.

In the dye fixing element 03, the PV of the second layer
A120 (Saponification degree 98%, polymerization degree 2000, manufactured by Kuraray)
Instead of PVA 217 (88% saponification, 17% polymerization)
00, Kuraray) or PVA420 (80% saponification degree)
Polymerization degree 2000, made by Kuraray)
Dye-fixing elements 04 and 05 were made. In addition, PVA21
The coating liquid using No. 7 has a viscosity of 23 cp at 40 ° C. and a temperature of 10 ° C.
Gelled. The coating solution using PVA420 is
The viscosity was 13 cp at 40 ° C. and 1000 cp or more at 10 ° C.

The dye-fixing elements 01 to 05 are prepared in two sheets each of A-4 size, conditioned at 25 ° C. and 80% RH for 4 hours, and laminated so that the surface of each sample and the back surface overlap. And apply a 7.5 kg load to the entire surface at 35 ° C 80
The cells were aged for 1 week in an environment of% RH. Thereafter, the dye-fixing element whose contact surface is the surface is replaced with the photosensitive element 101 described above.
And processed using an image recording apparatus described in JP-A-2-84634. That is, an original image (a test chart in which yellow, magenta, cyan, and gray wedges having continuously changing density are recorded) is scanned and exposed through a slit, and the photosensitive element is placed in water maintained at 35 ° C. for about 5 minutes. After immersion for 2 seconds, the film was squeezed with a roller and immediately overlaid so that the present dye-fixing element and the film surface were in contact with each other, and heated for 15 seconds using a heat roller adjusted so that the water-absorbed film surface reached 80 ° C. Next, when the photosensitive element and the dye fixing element were peeled off, a color image corresponding to the original image was obtained on the dye fixing elements 01 to 05. In this way,
The uniformity of the color images on the obtained dye fixing elements 01 to 05 was evaluated as follows. A: A uniform image was obtained without any "white spot unevenness". B: "White spot unevenness" slightly occurred on the forehead. C: Extremely mild “white spots” occurred on the entire surface. D: “White spot unevenness” occurs on the entire surface.

The haze of the untreated samples of the dye fixing elements 01 to 05 was measured. Further, the dye fixing element 0
After the treatment of 1 to 05, the sample was conditioned in an environment of 25 ° C. and 20% RH for 2 hours, and then the curl was measured. When the surface of the dye-fixing layer (surface) was placed on a desk facing upward, the average value of the heights of the four corners of the dye-fixing element from the desk was expressed as the degree of curl. The above results are summarized in Table-F.

[0093]

[Table 9]

From Table F, it can be seen that the dye-fixing element of the present invention has good curl resistance under low humidity and does not cause a decrease in transparency. It can be seen that "rarely occurs." Furthermore, it turns out that the effect is so large that the saponification degree of PVA is high.

[0095]

According to the present invention, in an image receiving material after development or thermal development / transfer, a dye which is excellent in curl resistance and transparency and does not cause unevenness in white spots even when stored for a long time under high humidity. A fixed element could be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing the temperature dependence of the viscosity of a polyvinyl alcohol (PVA) / borax-based aqueous solution.

Claims (2)

(57) [Claims] Claims: 1. An imagewise or after imagewise exposure of a photosensitive element containing at least a photosensitive silver halide, a hydrophilic binder and a dye-donating compound which releases a diffusible dye corresponding to or opposite to the exposure dose. At the same time, base or /
And a dye-fixing element having a dye-fixing layer to which a diffusible dye generated or released by development in the presence of a base precursor is transferred and fixed, the dye-fixing layer provided on one surface (surface) or And / or a base or / and / or a base precursor is contained in the adjacent layer and / or the base precursor, and at least the outermost layer on the opposite surface (back surface) is mainly composed of polyvinyl alcohol crosslinked with boric acid or / and a salt thereof. A dye-fixing element, comprising a layer to be dyed. 2. A method according to claim 1, wherein said photosensitive element containing at least a photosensitive silver halide, a hydrophilic binder and a dye-donating compound which releases a diffusible dye in correspondence with or in inverse proportion to the amount of exposure, is prepared after or after imagewise exposure. At the same time, base or /
And a dye-fixing layer having a dye-fixing layer to which a diffusible dye generated or released by thermal development in the presence of a base precursor is transferred and fixed, wherein the dye-fixing layer is provided on one surface (surface). Or / and a base or / and / or a base precursor is contained in a part or all of the adjacent layer, and at least the outermost layer on the opposite surface (back surface) is mainly composed of polyvinyl alcohol crosslinked with boric acid or / and a salt thereof. A dye-fixing element comprising a layer having the formula: