JPH0545824A - Color diffusion transfer photosensitive material - Google Patents

Abstract

PURPOSE:To obtain the color diffusion transfer photosensitive material capable of forming a positive image low in minimum density and high in maximum density by incorporating a specified reducible dye donor and a specified compound. CONSTITUTION:The color diffusion transfer photosensitive material formed on a support contains at least the reducible dye donor to be allowed to release a diffusive dye by being reduced and represented by the formula: PWR-(Time)t- Dye, an electron donor, and a photosensitive silver halide emulsion, and further contains at least one of the compounds represented by R<1>-C00R<2>. In the formula, PWR is a group to be allowed to release (Time)t-Dye by reduction; Time is a group to release the dye or its precursor by the following reaction; and t is 0 or 1. R<1> and R<2> is represented by formulae I and II in which each of R<11>-R<15> is a substituent having H, and each are selected so as to regulate the sum of aliphatic substituent Taft constant and Hammet substituent constant to >=0.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color diffusion transfer light-sensitive material, and more particularly, to a reducible dye-donor compound which releases a diffusible dye in the opposite reaction of silver halide reduction to silver. The present invention relates to a color diffusion transfer light-sensitive material which forms a positive image by combining with a usual negative type silver halide emulsion.

More specifically, the present invention relates to a color diffusion transfer photosensitive material for forming the above-mentioned positive image having a low minimum density and a high maximum density.

[0003]

2. Description of the Related Art As a method for directly forming a positive image by a color diffusion transfer method, A) a direct positive silver halide emulsion and a diffusible dye corresponding to a reaction in which silver halide is reduced to silver are used. A method using a combination of a diffusion-resistant compound (referred to as a negative dye-donor compound) to be released, and B).
A diffusion-resistant compound or a silver halide emulsion, which becomes diffusive in response to a normal silver halide emulsion (a silver halide emulsion having a negative-positive response) and a reaction in which silver halide is reduced to silver, is prepared. There is a method of using a combination of diffusion resistant compounds (these are referred to as bodi dye-donor compounds) that release diffusible dyes corresponding to the reaction of reduction to silver.

In the method A), for example, British Patent Nos. 1,3
No. 30,524, Japanese Patent Publication No. 48-39165, U.S. Pat. Nos. 3,443,940, 4,474,867, and 4,483,914, and the like, and the diffusible dye is described as a leaving group. A compound which has a coupler (1) and which releases a diffusible dye by a coupling reaction with an oxidant of a reducing agent (D
DR coupler), U.S. Pat. No. 3,928,312,
No. 4,053,312, No. 4,055,428, No. 4,336,322, etc., it is reducible to silver halide, and when silver halide is reduced, it is diffusible. A compound that releases a dye (DRR compound) is used.

In the method B), 1. U.S. Pat. Nos. 3,134,764 and 3,362.
819, 3,597,200, 3,544,5
45, 3,482,972, etc.,
1. A dye developing agent in which a hydroquinone-based developer and a dye component are linked (the dye developing agent is diffusible in an alkaline environment, but becomes non-diffusible when reacted with silver halide), Non-diffusible compounds described in U.S. Pat. No. 4,503,137, which release diffusible dyes in an alkaline environment but lose their ability when reacted with silver halide, and U.S. Pat. No. 3,980. , 479, etc., which release a diffusible dye by an intramolecular nucleophilic substitution reaction, and a diffusible dye by an intramolecular rewinding reaction of an isoxazolone ring described in US Pat. No. 4,199,354, etc. 2. a compound that releases US Patent No. 4,559,290, European Patent No. 22
0,746A2, U.S. Pat. No. 4,783,396,
A non-diffusible compound described in Japanese Unexamined Patent Publication No. 87-6199 which releases a diffusible dye by reacting with a reducing agent left unoxidized by development is used.

Among the above-mentioned two methods, the method B) is preferable in that high sensitivity can be easily obtained. However, the method B) has a problem that it is difficult to reduce the density of the lowest density portion which is particularly important in image formation.

In the method B), the dye-releasing reaction between the reducible dye-donor compound and the electron donor and the oxidation of the electron donor by the oxidant of the electron transfer agent (generated by the development of the photosensitive silver halide). The competition reaction and the reaction determine the density of the lowest density portion (corresponding to the highly exposed portion) of the blur image.

Therefore, in order to lower the minimum concentration at a high concentration, the reaction rate of the electron donor with the reducible dye-donating compound is controlled by controlling the dye-releasing reaction between the reducible dye-donating compound and the electron donor. There is a need for a technique for increasing the rate of reaction with the oxidized form of the electron transfer agent and a technique for sufficiently releasing the dye.

[0009]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a color diffusion transfer photosensitive material which overcomes the above problems and forms a blurred image having a low minimum density and a high maximum density. It is to be.

[0010]

The object is to provide a reducible dye-donating compound represented by the following general formula (I), which releases a diffusible dye when reduced, on a support.
A color diffusion transfer light-sensitive material having an electron donor, a light-sensitive halogenated emulsion, and after exposure is developed with an alkaline developer having a pH of 12 or more and containing an electron transfer agent to form an image. The present invention is more preferably achieved by a color diffusion transfer light-sensitive material characterized by containing at least one compound represented by (II). General formula (I) PWR- (Time) _t -Dye In the formula, PWR is reduced to give-(Tim).
e) represents a group that releases _t- Dye. Time is PWR
Represents a group that is released as-(Time) _t -Dye and then releases Dye through a subsequent reaction. t is 0
Or represents an integer of 1. Dye represents a dye or a precursor thereof. Formula (II) R ¹ -COOR ² wherein R ¹ and R ² are represented by the following general formula (III) or (I
It represents a group represented by V).

[0011]

[Chemical 3]

[0012]

[Chemical 4]

R ¹¹ to R in the general formulas (III) and (IV)
¹⁸ represents a substituent (including a hydrogen atom) on a carbon electron.
However, R ¹ and R ² are aliphatic Taft constants (σ of the substituents R ¹¹ , R ¹² and R ¹³ represented by the general formula (III).
^* Value), the Taft constant (σ ^- value) of R ¹⁴ and R ¹⁸ of the general formula (IV), and the Hammett constant (σ of R ¹⁵ and R ¹⁷ )
_m value), the sum of R ¹⁶ Hammett constants (σ _p value) is 0
Selected to be above.

The present invention will be described in detail below. Regarding the substituent constant in the present invention, "Explanation of Theoretical Organic Chemistry" (Imoto, Tokyo Kagaku Dojin, 1976), Chapters 19 and 20, and "Structure-Activity Relationship of Drugs" (Chemical Area Special Issue, No. 122, Nanko) Do 1979) Chapter 2, etc., and it is shown that the additive constant generally has an additive law, and the electron-withdrawing group has a larger value.

Examples of R ¹¹ to R ¹⁸ in the general formulas (III) and (IV) of the present invention are hydrogen atom, halogen atom, nitro group, cyano group, hydroxy group, carboxy group, sulfo group, mercapto group, Alkoxy group, aryloxy group, alkylthio group, arylthio group, alkylsulfonyl group, sulfonyl group, atarsulfonyl group, carbonamido group, sulfonamide group, amino group, carbamoyl group, alkoxycarbonyl group, aryloxycarbonyl group, acyloxy group, Examples include sulfamoyl group, acyl group, imide group, ureido group, alkoxycarbonylamino group, aryl group, and heterocyclic group.

In the present invention, if the sum of the substituent constants becomes too large, a decomposition reaction occurs during storage, so the sum of the substituent constants is more preferably 0 or more and 3 or less.

The compound represented by the general formula (II) can be used alone or in combination of two or more kinds. In addition, as a method of adding to the sensitive material film,
First, it is possible to use an emulsion dispersion method known in the art. At this time, it is possible to emulsify and add with other hydrophobic additives, or it may be emulsified alone. Further, as another addition method, a fine particle dispersion method known in JP-A-59-174830 can be used. Further, the addition layer may be any of a photosensitive layer, a protective layer, an intermediate layer, a color material layer, an ultraviolet absorbing layer, and an undercoat layer,
Of the above layers, it may be added to only one layer, or may be divided into two or more types and added.

The amount of the compound represented by the general formula (II) used has a wide range, but it is 1 g or less, preferably 0.5 g or less with respect to 1 g of the binder. Also, the application amount is 1
It is preferably 20 g or less, and particularly preferably 5 g or less per m ² .

When the reducible dye-donating compound and / or the diffusion-resistant electron donor is dissolved and dispersed in the compound represented by the general formula (II), the boiling point is from 50 ° C. to 150 ° C., if desired. The low boiling point organic solvent can be used together. Further, the polymer described in JP-B-51-39853 and JP-A-51-59943 may be used in combination.

In this case, the amount of the compound represented by the general formula (II) is 10 g or less per 1 g of the reducible dye-donating compound or the diffusion-resistant electron donor (the sum thereof when used in combination), It is preferably 5 g or less.

Various surfactants known to be used for dispersing the hydrophobic compound in the hydrophilic colloid can be used in this case as well. For example, JP-A-59-157
The surfactants listed on pages (37) to (38) of No. 636 can be used.

The general formula (II) used in the present invention is described below.
Specific examples of the compound represented by

[0023]

[Chemical 5]

[0024]

[Chemical 6]

[0025]

[Chemical 7]

[0026]

[Chemical 8]

[0027]

[Chemical 9]

Next, each component included in the present invention will be described. (A) Support The support used in the present invention is a transparent support, a white support, a black support or the like which is usually used as a smooth photographic support. The thickness of the transparent support is 50 to 350 μm,
Preferably, polyethylene terephthalate, cellulose acetate, polycarbonate or the like having a thickness of 70 to 210 μm is used. In order to prevent light piping, the transparent support may contain a slight amount of pigment such as titanium dioxide or a trace amount of dye.

The white support referred to in the present invention means a support having a white side on which the dye image-receiving layer is coated, and any support having sufficient whiteness and smoothness can be used. Can be done. For example, particle size 0.1 to 5 μm
Titanium oxide, barium sulphate, zinc oxide and other white pigments are added and stretched to form microvoids, which causes whitening of polymer films, such as polyethylene terephthalate, polystyrene, and polypropylene films and synthetic films formed by conventional sequential biaxial stretching. Paper, or paper obtained by laminating polyethylene, polyethylene terephthalate, polypropylene, or the like on both sides of paper, is preferably used. A white pigment such as titanium white may be embedded in the laminate layer.

The thickness of the support is 50 to 350 μm, preferably 70 to 210 μm, more preferably 80 to 150 μm.
m. If necessary, a light-shielding layer can be provided on the support. For example, a support obtained by laminating polyethylene containing a light-shielding agent such as carbon black on the back surface of a white support is used.

As the black support, polyethylene terephthalate, cellulose acetate, polycarbonate, polystyrene containing a light-shielding agent such as carbon black and having a thickness of 50 to 350 μm, preferably 70 to 210 μm,
A thickness of 50 to 400 μm, preferably 70 including a light shielding agent such as polypropylene or carbon black.
It is preferable to use polyethylene, polyethylene terephthalate, polypropylene or the like laminated on both sides of a paper support having a thickness of up to 250 μm.

As the carbon black raw material, for example, D
onnel Voest "Carbon Black"
Marcel Dekker Inc. , (1976)
Any manufacturing method such as a channel method, a thermal method and a furnace method as described in 1. can be used. The particle size of carbon black is not particularly limited, but is 90-
It is preferably 1800Å. The addition amount of the black pigment as the light-shielding agent may be adjusted depending on the sensitivity of the light-sensitive material to be shielded, but it is preferably about 5 to 10 in terms of optical density.

When a black support is used or the whiteness of the white support is insufficient, it is necessary to provide a white light reflection layer between the support and the dye image-receiving layer, and the particle size is 0.1. It is preferable to provide a layer containing / 5 μm white pigment such as titanium oxide, barium sulfate, zinc oxide, etc., or a hollow polymer latex. (B) Photosensitive layer In the present invention, a photosensitive layer comprising a silver halide emulsion layer combined with a dye image forming substance is provided. The components will be described below. (1) Dye image-forming substance The dye image-forming substance used in the present invention (hereinafter referred to as a reducible dye-donating compound) does not itself release a dye in connection with silver development, but it is a dye when reduced. Is to be released. This type of compound can be used in combination with an electron donor to release an imagewise diffusible dye upon reaction with the remaining electron donor which has been imagewise oxidized by silver development. For the atomic group having such a function, see, for example, US Pat. Nos. 4,183,753 and 4,1.
42,891, 4,278,750, 4,13
9,379, 4,218,368, JP-A-53-
110827, U.S. Pat. Nos. 4,278,750, 4,356,249, 4,358,525, JP-A-53-1108827, 54-130927, 56-164342, and U.S.A. Patent No. 4,783,396
Issue, publication technique 87-6199, European Patent Publication No. 220,
746A2 and the like.

The reducible dye-providing compound used in the present invention is preferably a compound represented by the following general formula (RI). General formula (RI) PWR- (Time) _t -Dye In the formula, PWR is reduced to give-(Tim).
e) represents a group that releases _t- Dye. Time is PWR
Represents a group that is released as-(Time) _t -Dye and then releases Dye through a subsequent reaction. t is 0
Or represents an integer of 1. Dye represents a dye or a precursor thereof.

First, the PWR will be described in detail. P
WR is US Pat. Nos. 4,139,389 and 4,13.
9,379, 4,564,577, JP-A-59-
As disclosed in Japanese Patent No. 185333 and No. 57-84453, a moiety containing an electron-accepting center and an intramolecular nucleophilic substitution reaction center in a compound which releases a photographic reagent by an intramolecular nucleophilic substitution reaction after being reduced. Or US Pat. No. 4,232,107, JP-A-59-101649, Research Disclosure (1984) IV, 24025 or JP-A-61-1.
As disclosed in 88257, it corresponds to an electron-accepting quinonoid center and a portion containing a carbon atom linking it to a photographic reagent in a compound that releases the photographic reagent by an electron transfer reaction in the molecule after reduction. It may be one. Further, JP-A-56-142530,
U.S. Pat. Nos. 4,343,893 and 4,619,88
As disclosed in No. 4, an aryl group substituted with an electron-withdrawing group in a compound in which a single bond is cleaved after reduction to release a photographic reagent and an atom (a sulfur atom or a carbon atom or It may correspond to a portion including a nitrogen atom). U.S. Pat. No. 4,450,
No. 223, which may correspond to a nitro group in a nitro compound that releases a photographic reagent after accepting an electron and a portion containing a carbon atom connecting the nitro group and the photographic reagent, and US Pat. No. 4,609,610, which corresponds to a geminal dinitro moiety in a dinitro compound that beta-eliminates a photographic reagent after electron acceptance and a part containing a carbon atom connecting the nitro reagent to the photographic reagent. Is also good.

Further, compounds having SO ₂ --X (X represents oxygen, sulfur or nitrogen) and an electron-withdrawing group in one molecule described in US Pat. No. 4,840,887,
PO in one molecule described in JP-A-63-271344
A compound having a -X bond (X is the same as above) and an electron-withdrawing group, a C-X 'bond (synonymous with X'and X or -SO in one molecule described in JP-A-63-271341). _2- represents) and a compound having an electron-withdrawing group.

In order to more fully achieve the object of the present invention, among the compounds of general formula (RI), those represented by general formula (RII) are preferred.

[0038]

[Chemical 10]

(Time) _t -Dye is R ¹⁰¹ , R ¹⁰²
Alternatively, it binds to at least one of EAGs. The part corresponding to PWR in the general formula (RII) will be described.

X is an oxygen atom (-O-) or a sulfur atom (-S).
-) Or a group containing a nitrogen atom (-N (R ¹⁰³ )-). R ¹⁰¹ , R ¹⁰² and R ¹⁰³ represent a group other than a hydrogen atom or a mere bond.

Examples of the group other than the hydrogen atom represented by R ¹⁰¹ , R ¹⁰² and R ¹⁰³ include an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, a sulfonyl group, a carbamoyl group and a sulfamoyl group. Yes, these may have a substituent.

R ¹⁰¹ and R ¹⁰³ are preferably substituted or unsubstituted alkyl groups, alkenyl groups, alkynyl groups, aryl groups, heterocyclic groups, acyl groups, sulfonyl groups and the like. The carbon number of R ¹⁰¹ and R ¹⁰³ is preferably 1 to 40.

R ¹⁰² is a substituted or unsubstituted acyl group,
A sulfonyl group is preferred. The number of carbon atoms is preferably 1-40. R ¹⁰¹ , R ¹⁰² and R ¹⁰³ may combine with each other to form a 5- to 8-membered ring.

Oxygen is particularly preferable as X. The EAG will be described later. Further, in order to achieve the object of the present invention, among the compounds represented by the general formula (RII), the compounds represented by the general formula (RIII) are preferable.

[0045]

[Chemical 11]

(Time) _t -Dye is R ¹⁰⁴ , EAG
To at least one of the. X has the same meaning as described above. R ¹⁰⁴ represents an atom group which is bonded to X and a nitrogen atom to form a 5- to 8-membered monocyclic or condensed heterocycle including the nitrogen atom.

In the general formulas (RII) and (RIII), EAG represents a group that receives an electron from a reducing substance, and is bonded to a nitrogen atom. As EAG, a group represented by the following general formula (A) is preferable.

[0048]

[Chemical formula 12]

In the general formula (A), Z ₁ represents a group represented by Chemical formula 13 or> N-.

[0050]

[Chemical 13]

V _n represents an atomic group forming a 3- to 8-membered aromatic with Z ₁ and Z ₂ , and n represents an integer of 3 to 8. _{V 3; -Z 3 -, V} 4; -Z 3 -Z 4 -, V 5; -
_{Z 3 -Z 4 -Z 5 -,} V 6; -Z 3 -Z 4 -Z 5 -Z 6
_{-, V 7; -Z 3 -Z} 4 -Z 5 -Z 6 -Z 7 -, V 8;
_{-Z 3 -Z 4 -Z 5 -Z 6} -Z 7 -Z 8 - a.

Z _{2 to} Z ₈ are each a group represented by Chemical formula 14,
A group represented by Chemical formula 15, -O-, -S-, or -S
Each represents O ₂ — and Sub represents a simple bond (pi bond), a hydrogen atom or a substituent described below.
Subs may be the same or different, and may be bonded to each other to form a 3- to 8-membered saturated or unsaturated carbocycle or heterocycle.

[0053]

[Chemical 14]

[0054]

[Chemical 15]

In the general formula (A), Sub is selected so that the sum of the Hammett substituent constants sigmapara of the substituents is +0.50 or more, more preferably +0.70 or more, and most preferably +0.85 or more.

EAG is preferably an aryl group substituted with at least one electron-withdrawing group, or a heterocyclic group. The substituent bonded to the aryl group or heterocyclic group of EAG can be used for controlling the physical properties of the entire compound. Examples of the physical properties of the entire compound, in addition to adjusting the electron acceptability, for example, water-soluble, oil-soluble, diffusible, sublimable, melting point, dispersibility in binders such as gelatin, reactivity to nucleophilic groups, It can be used to control the reactive groups for electrophilic groups.

A specific example of EAG is shown in US Pat. No. 4,78.
No. 3,396, European Patent Publication No. 220,746A2, No. 6
~ Page 7. Time represents a group which releases Dye through a subsequent reaction by using cleavage of nitrogen-oxygen, nitrogen-nitrogen or nitrogen-sulfur bond as a scratch.

Various groups represented by Time are known,
For example, JP-A-61-147244, pages (5) to (6)
And the groups described in JP-A Nos. 62-215270 and 61-236549, pages (8) to (14).

The dye represented by Dye may be an off-the-shelf dye, or alternatively a dye precursor that can be converted to a dye during photographic processing or additional processing steps, and the final image dye may be metal chelated. You don't have to. Representative dyes include metal chelated or non-metal chelated dyes such as azo dyes, azomethine dyes, anthraquinone dyes and phthalocyanine dyes. Among these, azo cyan, magenta and yellow dyes are particularly useful. Examples of yellow dyes: US Pat. No. 3,597,200,
3,309,199, 4,013,633, 4,245,028, 4,156,609, 4,139,383, 4,195,992, 4 , 148, 641, 4,148, 643, 4,336, 322, JP-A-51-114930,
No. 56-71072, Research Discl.
No. 17630 (1978), 16
Those described in No. 475 (1977). Examples of magenta dyes: US Pat. No. 3,453,107,
3,544,545, 3,932,380, 3,931,144, 3,932,308, 3,954,476, 4,233,237, 4 , 255, 509, 4,250, 246, 4,142, 891, 4,207, 104, 4,287, 292, JP-A-52-106727,
53-23628, 55-36804, 56
-73056, 56-71060, 55-13
What is described in No. 4. Examples of cyan dyes: U.S. Pat. Nos. 3,482,972, 3,929,760, 4,013,635, 4,268,625, 4,171,220, 4,4. 242,435, 4,142,891, 4,195,994, 4,147,544, 4,148,642, British Patent 1,551,138.
JP-A-54-99431, JP-A-52-8827,
No. 53-47823, No. 53-143323, No. 5
4-99431, 56-71061, European Patent (EPC) 53,037, 53,040, R
essearch Disclosure No. 176
30 (1978) and 16475 (1977).

As a kind of dye precursor, a diffusion resistant dye-providing compound having a dye whose absorption spectrum is temporarily shifted can be used during storage and exposure of the light-sensitive material. A dye whose absorption spectrum is temporarily shifted (hereinafter referred to as a temporary shift dye) means a dye whose absorption spectrum is different from the original absorption spectrum when observed as an image. , The original absorption spectrum may be obtained at the same time as being emitted from the diffusion-resistant dye-providing compound, and the original absorption spectrum may be obtained independently of the emission at the time of development. The original absorption spectrum may be obtained after reaching.

The dyes used here include yellow, magenta, cyan, black and the like. When these dyes are structurally classified, nitro and nitroso dyes, azo dyes (benzeneazo dyes, naphthaleneazo dyes, heterocyclic azo dyes, etc.) ), Stilbene dye, carbonium dye (diphenylmethane dye, triphenylmethane dye, xanthene dye, acridine dye, etc.), quinoline dye, methine dye (polymethine dye, azomethine dye, etc.), thiazole dye, quinoneimine dye (azine dye, oxazine dye, Thiazine dyes, etc.), lactone dyes, aminoketone dyes, hydroxyketone dyes, anthraquinone dyes,
Examples thereof include indigo dyes, thioindigo dyes, and phthalocyanine dyes. Preferred temporary shift dyes are azo dyes, carbonium dyes, anthraquinone dyes, methine dyes, and quinoneimine dyes, and particularly preferred are azo dyes.

As a method for obtaining a temporary shift dye which can be used in the present invention, a dye is used as a two-electron reductant, and an original absorption spectrum is shifted by a hypsochromic color, and oxidation is carried out during or after development processing to obtain an original absorption spectrum. Method (azo dye, anthraquinone dye, methine dye, quinoneimine dye, indigo dye, etc.), the auxochrome is chemically blocked to shift the original absorption spectrum to a hypsochromic color, and deblocking is performed during development processing to achieve the original absorption. Spectral method (chemical blocking method) (azo dye, carbonium dye, methine dye, etc.), or after reaching the image-receiving layer, it is chelated with a metal ion to change to a dye having a desired absorption spectrum. Methods [post-chelation method] (azo dye, methine dye, phthalocyanine dye, etc.) Chemical blocking method and the post-chelate method in the bright is preferred.

Regarding these methods, in the method of chemically blocking the auxochrome, as an example in which the release and the deblocking of the dye occur independently, JP-A-57-158638 and JP-A-5-158638.
5-53329, 55-53330, and the like, and as a more general example of the method of other blocks, U.S. Pat. No. 4,009,02.
No. 9, No. 4,310,612, No. 3,674,478
No. 3,932,480, No. 3,993,661
No. 4,433,200, 4,363,865
No. 4,410,618. An example in which the release and deblocking of the dye occur at the same time is described as a specific example in US Pat. No. 4,783,396. Further, a method of changing to a dye having a desired absorption spectrum by chelating with a metal ion after reaching the image receiving layer is disclosed in JP-A-58-209742.
58-2020974, 58-17438, 5
8-17437, 58-17436, 57-1
No. 85039, No. 57-58149, US time 4-2.
04,993, 4,148,642, 4,14
7,544, JP-A-57-158637, 58-
123537, 57-181546, 60-5.
7837, 57-182738, 59-208.
No. 551, No. 60-37555, No. 59-15448.
No. 59-149362, No. 59-164553, and the like.

The compound represented by the above general formula (RII) or (RIII) needs to be non-migrating in the photographic layer itself, and therefore EAG, R ¹⁰¹ , R ¹⁰² , R
It is desirable to have a ballast group having 8 or more carbon atoms at the ¹⁰⁴ or X position (particularly at the EAG position).

Typical examples of the reducible dye-donating compound used in the present invention are listed below, but the present invention is not limited to these, and US Pat. No. 4,783,396 is used.
No., European Patent Publication No. 220,746A2, Public Technical Report 87
The dye-donor compounds described in -6199 and the like can also be used.

[0066]

[Chemical 16]

[0067]

[Chemical 17]

[0068]

[Chemical 18]

[0069]

[Chemical 19]

[0070]

[Chemical 20]

[0071]

[Chemical 21]

[0072]

[Chemical formula 22]

[0073]

[Chemical formula 23]

[0074]

[Chemical formula 24]

Each of these compounds can be synthesized by the methods described in the patent specifications cited above.
The amount of the reducing dye-providing compound used depends on the extinction coefficient of the dye, but is in the range of 0.05 to 5 mmol / m ² , preferably 0.1 to 3 mmol / m ² . The dye-donor compounds may be used alone or in combination of two or more. Also,
To obtain an image of black or different hue, Japanese Patent Application Laid-Open No.
No. 0-162251, for example, a cyan, magenta, and yellow dye-donating compound are mixed in a layer containing at least one type of silver halide or in an adjoining layer, and the mixture has a different hue. It is also possible to use a mixture of two or more dye-providing compounds that release a sex dye. (2) Electron Donor In the present invention, an electron donor (in the present invention, an electron donor is also meant to include a precursor thereof) is used. For details of these compounds, see US Pat. No. 4,783,396.
No., European Patent Publication No. 220,746A2, Public Technical Report 87
No. 6199 and the like. A particularly preferable electron donor is a compound represented by the following general formula (SI) or (SII).

[0076]

[Chemical 25]

In the formula, A ¹⁰¹ and A ¹⁰² each represent a hydrogen atom or a protecting group for a phenolic hydroxyl group which can be deprotected by a nucleophile. Here, as the nucleophile,
OH ⁻ , RO ⁻ (R; alkyl group, aryl group, etc.),
Anionic reagents such as hydroxamic acid anions and SO ₃ ^2-, and compounds having non-shared electron pairs such as primary or secondary amines, hydrazine, hydroxylamines, alcohols and thiols ..

In the formula, when A ¹⁰¹ and A ¹⁰² represent a group which can be removed by an alkali (hereinafter referred to as a precursor group), it is preferably an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an imidoyl group or an oxazolyl group. Groups, hydrolyzable groups such as sulfonyl groups, precursor groups of the type utilizing the reverse Michael reaction described in US Pat. No. 4,009,029, ring opening reaction described in US Pat. No. 4,310,612. A precursor group of the type which utilizes an anion generated later as an intramolecular nucleophilic group, and an anion described in US Pat. Nos. 3,674,478, 3,932,480 or 3,993,661 is conjugated. Precursor groups that transfer electrons through the system, thereby causing a cleavage reaction, in US Pat. No. 4,335,200. Precursor to cause cleavage reaction by electron transfer Hiraku Tamaki reaction anion of the mounting base or U.S. Pat. No. 4,363,865, the 4, 41
Precursor groups utilizing an imidomethyl group described in No. 0,618 are mentioned.

A ¹⁰¹ and A ¹⁰² are R when possible.
²⁰¹ , R ²⁰² , R ²⁰³ and R ²⁰⁴ may be bonded to each other to form a ring. Further, A ¹⁰¹ and A ¹⁰² may be the same or different.

R ²⁰¹ , R ²⁰² , R ²⁰³ and R ²⁰⁴ are each a hydrogen atom, an alkyl group, an aryl group, an alkylthio group, an arylthio group, a sulfonyl group, a sulfo group, a halogen atom, a cyano group, a carbamoyl group, a sulfamoyl group or an amide. Group, imide group, carboxyl group, sulfonamide group and the like. These groups may have a substituent if possible.

However, the total number of carbon atoms of R ^{201 to} R ²⁰⁴ is 8
That is all. In the general formula (SI), R ²⁰¹ and R ²⁰² and / or R ²⁰³ and R ²⁰⁴ are represented by the general formula (SI).
In I), R ²⁰¹ and R ²⁰² , R ²⁰² and R ^203, and / or R ²⁰³ and R ²⁰⁴ may combine with each other to form a saturated or unsaturated ring.

Among the electron donors represented by the general formula (SI) or (SII), those in which at least two of R ^{201 to} R ²⁰⁴ are substituents other than hydrogen atom are preferable. Particularly preferred compounds are those in which at least one of R ²⁰¹ and R ²⁰² and at least one of R ²⁰³ and R ²⁰⁴ are a substituent other than a hydrogen atom.

A plurality of electron donors may be used in combination, or an electron donor and its precursor may be used in combination. Specific examples of the electron donor are listed, but the present invention is not limited to these compounds.

[0084]

[Chemical formula 26]

[0085]

[Chemical 27]

[0086]

[Chemical 28]

[0087]

[Chemical 29]

[0088]

[Chemical 30]

Although the amount of the electron donor used has a wide range,
Preferably 0.01 to 5 per mole of positive dye-donor compound
The preferable range is 0 mol, particularly 0.1 to 5 mol. Also, 0.001 mol to 5 mol per mol of silver halide
The molar amount is preferably 0.01 to 1.5 mol. (3) Intermediate layer In addition to a diffusion-resistant electron donor as a reducing agent, a diffusible electron transfer agent as a reducing agent in order to suppress stain of a positive image-forming photosensitive material using such a reducible dye-providing compound. It is effective to use, but the resulting electron transfer agent radicals diffuse to other layers having different color sensitivities, cross-oxidize the electron donors there, and further promote fog development and decrease the image density. There is a problem that the color reproduction is deteriorated by causing the

In order to solve these problems, an intermediate layer may be provided between the photosensitive layers having different color sensitivities, or a diffusion resistant reducing agent may be contained in the intermediate layer. Specific examples thereof include non-diffusible hydroquinone, sulfonamide phenol, sulfonamide naphthol, and the like, and more specifically, JP-B Nos. 50-21249 and 50-2381.
3, No. 49-106326, No. 49-129535.
U.S. Pat. Nos. 2,336,327 and 2,360,
No. 290, No. 2,403,721, No. 2,544,6
No. 40, No. 2,732,300, No. 2,782,65
No. 9, No. 2,937,086, No. 3,637,393
No. 3,700,453, British Patent No. 557,75.
No. 0, JP-A-57-24941 and JP-A-58-21249.
No. etc. Further, regarding the dispersion method thereof, JP-A-60-238831 and JP-B-60-1897.
No. 8.

The amount used is 1 m of the support in each intermediate layer.
0.05 to 50 mmol per ² , binder 1
It is in the range of 0.01 to 50 mmol per g.
The method of adding the diffusion resistant reducing agent to the intermediate layer includes an oil dispersion method, a polymer dispersion method, a fine particle dispersion method and the like, and any method may be used.

As the binder for the intermediate layer of the present invention, gelatin or gelatin derivatives, cellulose derivatives, polysaccharides such as dextran, natural substances such as gum arabic, polyvinyl acetal (preferably having an acetalization degree of 20% or less, for example, Polyvinyl butyral), polyacrylamide, polyvinyl pyrrolidone, ethyl cellulose, polyvinyl alcohol (preferably,
Water-soluble polymers such as those having a saponification rate of 75% or more).

If necessary, two or more kinds of these binders may be mixed and used. Further, the intermediate layer of the present invention may contain solid particles. For example, various white pigments such as titanium dioxide, zinc oxide, calcium oxide, calcium carbonate, magnesium carbonate, barium sulfate, aluminum oxide, silicon dioxide, black pigments such as carbon black, and other organic and inorganic coloring pigments are used. can do. Further, metal powder such as ferrite, aluminum powder, and copper powder, and metal powder such as graphite powder can be used.

Polymer particles can also be used as the solid particles of the intermediate layer of the present invention. If desired, these solid particles may be used in combination of two or more kinds. The average particle diameter of the solid particles contained is 0.005 μm to 1.
It is 0 μm, preferably 0.01 μm to 0.5 μm.

The content of solid particles in the intermediate layer of the present invention is
It is preferably 5% by weight or more, more preferably 20 to 100% by weight, based on the binder of the intermediate layer. (4) Addition method (5) Silver halide emulsion In the present invention, silver halide emulsions having various shapes can be used. Examples of them are regular particles having regular crystal bodies such as cubes, octahedra and tetradecahedrons, tabular grains, spherical grains, grains having irregular crystal shapes such as potato grains, etc. Can be mentioned.

The silver halide composition of these grains is any of silver bromide, silver iodobromide, silver iodochlorobromide, silver chlorobromide, silver chloroiodide, and silver chloride. May be used, but silver bromide or silver chlorobromide is preferred. Further, it may contain silver thiocyanate, silver cyanate and the like.

The silver halide composition in the grain may be uniform, may have different halogen compositions inside and outside, or may have a layered structure. (JP-A-5
7-154232, 58-108533, 58
-248469, 59-48755, 59-5
2237, U.S. Pat. Nos. 3,505,068 and 4,
433,048, 4,444,877, European Patent 100,984, and British Patent 1,027,14.
No. 6) The silver halide emulsion may be monodisperse or polydisperse,
You may mix and use a monodisperse emulsion. The particle size is 0.
01 μ to 10 μ, particularly 0.1 μ to 3 μ is preferable.

Here, the monodisperse silver halide emulsion means that the total weight or the total number of silver halide grains contained therein is 95.
% Or more is within ± 40% of the average particle size, more preferably ± 3
Defined to be within 0%.

Specifically, US Pat. No. 4,500,62
No. 6, Column 50, No. 4,628,021, Research
Disclosure magazine (hereinafter abbreviated as RD) 1702
9 (1978) and any of the silver halide emulsions described in JP-A No. 62-253159 and the like can be used.

Two or more kinds of silver halides having different crystal habits, halogen compositions, grain sizes, grain size distributions and the like can be used in combination, and they can be used in different emulsion layers and / or the same emulsion layer. It is possible to

In the present invention, it is particularly advantageous to use tabular silver halide grains. Regarding tabular silver halide grains, U.S. Pat. No. 4,434,226 has already been mentioned.
Nos. 4,439,520 and 4,414,310
No. 4,433,048, 4,414,306
No. 4,459,353, JP-A-59-99433.
No. 62-209445 and the like, the manufacturing method and the use technique thereof are disclosed.

Further, JP-A-63-220238 and JP-A-1-201649 disclose tabular silver halide grains in which dislocations are intentionally introduced. The ratio of the average grain diameter to the average grain thickness in tabular grains (hereinafter referred to as grain diameter / thickness) is preferably 2 or more, and 3 to
It is preferably 12 and particularly preferably 5-8.

The grain diameter / thickness can be obtained by averaging the grain diameters / thicknesses of all tabular grains. A simple method is to use the average diameter of all tabular grains and the average thickness of all tabular grains. It can also be calculated as the ratio with.

The diameter of the tabular grains (corresponding to a circle) is 0.3 μm or more, preferably 0.3 to 10 μm, more preferably 0.
5 to 5.0 μm, more preferably 0.5 to 2.0 μm
Is.

The grain thickness is less than 1.0 μm, preferably 0.05 to 0.5 μm, more preferably 0.08 to
It is 0.3 μm. In the present invention, the tabular grains account for 50% or more of the projected area of all grains in the emulsion containing the tabular grains. Preferably 70% or more, more preferably 9
It is 0% or more.

The grain diameter and grain thickness of the tabular grains can be measured by an electron micrograph of the grains as described in US Pat. No. 4,434,226. Specific examples of the halogen composition of tabular grains include silver chloroiodide, silver iodobromide, silver chloride, silver chlorobromide, silver bromide, and silver chloroiodobromide. Alternatively, silver chlorobromide is preferable. It may also contain silver thiocyanate, silver cyanate and the like.

Further, in the present invention, the tabular grains are preferably monodisperse. The structure and manufacturing method of monodisperse tabular grains are described in, for example, JP-A-63-151618.

In the tabular grains, silver halides having different compositions may be joined by epitaxial joining, or may be joined with compounds other than silver halide such as silver thiocyanate and oxides. These emulsion grains are described in U.S. Pat.
142,900, 4,459,353, British Patent 2,038,792, U.S. Patent 4,349,62.
No. 2, No. 4,395,478, No. 4,433,501
No. 4,463,087, No. 3,656,962
No. 3,852,067, JP-A-59-16254.
No. 0 and the like.

The silver halide emulsion may be used without being chemically sensitized, but usually the grain surface of the silver halide emulsion is chemically sensitized. The above-mentioned chemical sensitization is described by James, The Theory of Photographic Process, 4th edition, published by Macmillan, 1977, (TH Jam
es, The Theory of the Photo
graphical Process, 4th ed, M
Acmillan, 1977) 67-76, and using active gelatin, and Research Disclosure 120, April 1974, 12008; Research Disclosure, 3;
Volume 4, June 1975, 13452, U.S. Pat. No. 2,6
42,361, 3,297,446, 3,77
No. 2,031, No. 3,857,711, No. 3,90
1,714, 4,266,018, and 3,
904,415 and British Patent No. 1,315,75
Sulfur, selenium, tellurium at pAg 5-10, pH 5-8 and temperature 30-80 ° C as described in No.
It can be carried out using gold, platinum, palladium, iridium, rhodium or a combination of these sensitizers.
Chemical sensitization is optimally carried out in the presence of gold and thiocyanate compounds, and sulfur-containing compounds as described in US Pat. Nos. 3,857,711, 4,266,018 and 4,054,457. It is performed in the presence of a compound or a sulfur-containing compound such as hypo, a thiourea compound, and a rhodanine compound.

It is also possible to carry out chemical sensitization in the presence of a chemical sensitization aid. As the chemical sensitization aid to be used, compounds such as azaindene, azapyridazine and azapyrimidine which are known to suppress fog and increase sensitivity in the process of chemical sensitization are used. Examples of chemical sensitization aids are:
US Pat. Nos. 2,131,038 and 3,411,91
4, 3,554,757, JP-A-58-1265.
No. 36, JP-A No. 62-253159 and Daffin's "Photographic Emulsion Chemistry", pages 138-143 (published by Focal Press, 1966).

In addition to or in place of chemical sensitization, US Pat. Nos. 3,891,446 and 3,984,24
It can be reduction sensitized with, for example, hydrogen as described in US Pat. No. 2,518,698.
No. 2,743,182 and No. 2,743,18
Reduction sensitization with stannous chloride, thiourea dioxide, polyamines and such reducing agents as described in No. 3 or by low pAg (eg less than 5) or high pH (eg greater than 8) treatment. be able to. U.S. Pat. Nos. 3,917,485 and 3,966,47.
The chemical sensitization method described in No. 6 can also be applied.

Further, Japanese Patent Laid-Open No. 61-3134 and 61-3
The sensitizing method using an oxidizing agent described in JP-A No. 136 can also be applied. The silver halide grains used in the present invention are usually those which have been physically ripened, chemically ripened and spectrally sensitized. Additives used in such a process are Research Disclosure No. 17643 and No. 17643. 18716.

As the protective colloid used when preparing the emulsion of the present invention, it is advantageous to use gelatin, but other hydrophilic colloids can also be used. For example, gelatin derivatives, graft polymers of gelatin and other polymers, proteins such as albumin and casein; hydroxyethyl cellulose, carboxymethyl cellulose,
Cellulose derivatives such as cellulose sulfates, sodium alginate, sugar derivatives such as starch derivatives; polyvinyl alcohol, polyvinyl alcohol partial acetals, poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinyl imidazole, A wide variety of synthetic hydrophilic polymeric substances such as single or copolymers such as polyvinylpyrazole can be used.

Examples of gelatin include lime-processed gelatin, acid-processed gelatin and Bull. Soc. Sci. Ph
oto. Japan. No. 16, P30 (1966)
You may use the enzyme-processed gelatin as described in,
Further, a hydrolyzate or an enzymatic hydrolyzate of gelatin can also be used.

Various antifoggants or photographic stabilizers can be used in the present invention. Examples thereof include azoles and azaindenes described on pages 24 to 25 of RD17643 (1978), JP-A-59-1684.
42-containing nitrogen-containing carboxylic acids and phosphoric acids,
Alternatively, mercapto compounds and metal salts thereof described in JP-A-59-111636, acetylene compounds described in JP-A-62-87957 and the like can be used.

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

Specifically, US Pat. No. 4,617,25
7, JP-A-59-180550 and JP-A-60-1403.
No. 35, RD17029 (1978) 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 especially for the purpose of supersensitization. A dye that does not itself have a spectral sensitizing effect or a compound that does not substantially absorb visible light, together with a sensitizing dye,
A compound exhibiting supersensitization may be contained in the emulsion (for example, U.S. Pat. No. 3,615,641 and JP-A-63-231).
45, etc.).

These sensitizing dyes may be added to the emulsion at the time of chemical ripening or before or after chemical ripening, or in accordance with US Pat. Nos. 4,183,756 and 4,225,666, the core of silver halide grains may be added. It may be before or after formation. In particular, the presence of a sensitizing dye at the time of chemical sensitization often gives a preferable effect.

The addition amount is generally about 10 ^-8 to 10 ^-2 mol per mol of silver halide. Useful sensitizing dyes used in the present invention are, for example, US Pat. No. 3,522,05.
No. 2, No. 3,619,197, No. 3,713,828
Issue No. 3,615,643 Issue 3,615,632
No. 3,617,293, 3,628,964
No. 3,703,377, No. 3,666,480
Issue 3, Issue 3,667,960, Issue 3,679,428
No. 3,672,897, No. 3,769,026
Issue 3,556,800, Issue 3,615,613
Issue No. 3,615,638 Issue No. 3,615,635
Issue 3,705,809, Issue 3,632,349
Issue 3, Issue 3,677,765, Issue 3,770,449
Issue 3, Issue 3,770,440, Issue 3,769,025
Issue No. 3,745,014 Issue No. 3,713,828
No. 3,567,458, No. 3,625,698
No. 2, 526, 632, No. 2, 503, 776
No. 48, JP-A-48-76525, Belgian Patent No. 69
No. 1,807 and the like.

The coating amount of the photosensitive silver halide used in the present invention is in the range of 1 mg to 10 g / m ³ in terms of silver. (6) Structure of Photosensitive Layer For reproduction of natural color by the subtractive color method, the dye image-forming substance which provides a dye having a selective spectral absorption in the same wavelength range as the emulsion spectrally sensitized by the spectral sensitizing dye. A photosensitive layer consisting of at least two of The emulsion and the dye image-forming substance may be coated as separate layers,
Alternatively, they may be mixed and coated as a single layer. When the dye image-forming substance is coated and has absorption in the spectral sensitivity region of the emulsion combined with it, another layer is preferable. In this case, the layer of the reducible dye-providing compound is preferably located under the silver halide emulsion layer in terms of sensitivity. The emulsion layer may be composed of a plurality of emulsion layers having different sensitivities, and an arbitrary layer may be provided between the emulsion layer and the dye image-forming substance layer. A partition layer described in JP-B-60-15267 can be provided to increase the color image density, or JP-B-60-
It is also possible to increase the sensitivity of the photosensitive element by providing a reflective layer described in No. 91354.

In a preferred multilayer structure, a combination unit of blue-sensitive emulsion, a combination unit of green-sensitive emulsion and a combination unit of red-sensitive emulsion are sequentially arranged from the exposure side. When the present invention is used as a photographing material, an ultraviolet absorbing layer can be provided on the uppermost layer of the photosensitive layer.

For the absorption layer, various ultraviolet absorbers generally used in the technical field such as benzotriazole compounds, 4-thiazolidone compounds and benzophenone compounds can be used. (C) Dye image receiving layer The dye image receiving layer used in the present invention comprises a hydrophilic colloid containing a mordant. This may be a single layer or may have a multi-layered structure in which mordants having different mordant strengths are applied in layers. Regarding this, JP-A-61-25255
No. 1 is described. As the mordant, a polymer mordant is preferable.

The polymer mordant used in the present invention is a polymer having a secondary or tertiary amino group, a polymer having a nitrogen-containing heterocyclic moiety, a polymer having a quaternary cation group thereof, or the like and having a molecular weight of 5,000 or more. And particularly preferably 10,000 or more.

For example, US Pat. No. 2,548,564
Issue 2, Issue 2,484,430, Issue 3,148,061
Nos. 3,756,814 and other vinyl pyridine polymers and vinyl pyridinium cation polymers; US Pat. No. 4,124,386 and other vinyl imidazolium cation polymers; US Patent Nos. 3,625,694, 3,859,
096, 4,128,538, British Patent Nos. 1,2
77,453 and other polymer mordants capable of crosslinking with gelatin and the like; US Pat. No. 3,958,9
No. 95, No. 2,721,852, No. 2,798,06
3, JP-A-54-115228 and JP-A-54-1455.
No. 29, No. 54-126027, No. 54-15583.
5, sol-type mordants disclosed in US Pat. No. 5,617,352; etc .; water-insoluble mordants disclosed in US Pat. No. 3,898,088; US Pat. No. 4,168,976. Reactive mordants capable of forming a covalent bond with the dyes disclosed in U.S. Pat. No. 4,201,840 and the like; and U.S. Pat. Nos. 3,709,690 and 3,7.
88,855, 3,642,482, 3,48
8,706, 3,557,066, 3,27
1,147, 3,271,148, JP-A-53-
No. 30328, No. 52-155528, No. 53-12
5, No. 53-1024, No. 53-107835,
The mordants disclosed in British Patent No. 2,064,802 and the like can be mentioned.

Others, US Pat. No. 2,675,316
The mordants described in Nos. 2,882,156 can also be mentioned. Of these mordants, those which do not easily move from the mordant layer to another layer are preferable, and those which cross-link with a matrix such as gelatin, water-insoluble mordants, and aqueous sol (or latex dispersion) type mordants are preferable. .. A latex dispersion mordant is particularly preferred, and the particle size is 0.01 to 2 μm, preferably 0.05 to
It is preferably 0.2 μm.

The coating amount of the mordant varies depending on the kind of the mordant, the content of the quaternary cation group, the kind and amount of the dye to be mordant, the kind of the binder to be used, etc.
² , preferably 1.0 to 5.0 g / m ² , and particularly preferably ² to 4 g / m ² .

As the hydrophilic colloid used in the image receiving layer, gelatin, polyvinyl alcohol, polyacrylamide, polyvinylpyrrolidone and the like are used, and gelatin is preferred.

An anti-fading agent may be used in the image receiving layer. As the anti-fading agent, for example, an antioxidant, an ultraviolet absorber,
Or there is some kind of metal complex. These are substantially contained in the image receiving layer, but can be added to other layers as long as the effect can be obtained.

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.

As the ultraviolet absorber, benzotriazole compounds (US Pat. No. 3,533,794, etc.),
4-thiazolidone compounds (U.S. Pat. No. 3,352,6
No. 81), benzophenone compounds (JP-A-46-
2784) and others, JP-A-54-48535,
There are compounds described in JP-A-62-136641, JP-A-61-188256 and the like. Further, the ultraviolet absorbing polymer described in JP-A-62-260152 is also effective.

Examples of the metal complex include US Pat.
No. 1,155, No. 4,245,018, columns 3 to 36,
No. 4,254,195, columns 3 to 8, JP-A-62-17.
4741, 61-88256 (27) to (29).
Page, JP-A-1-75568, JP-A-63-19924.
There are compounds described in No. 8 and the like.

Examples of useful anti-fading agents are disclosed in JP-A-62-21.
5272 (125)-(137). An anti-fading agent for preventing fading of the dye transferred to the image-receiving element may be contained in the image-receiving element in advance, or may be supplied to the image-receiving element from the outside such as a light-sensitive element or a processing composition. Good.

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 element and the image-receiving element. In particular, it is preferable to incorporate a fluorescent whitening agent in the image receiving element, or to incorporate it into a light sensitive element or a processing composition and supply it to the image receiving element during the processing step. As an example, K. Veenkat
araman ed "The Chemistry of
The compounds described in Synthetic Dyes, Vol. V, Chapter 8, JP-A-61-143752 and the like can be mentioned. 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. (D) Layer Having Neutralizing Function The layer having a neutralizing function used in the present invention is a layer containing an acidic substance in an amount sufficient to neutralize the alkali carried from the treatment composition, and if necessary, , A neutralization rate adjusting layer (timing layer), an adhesion enhancing layer and the like may be used. The preferred acidic substance is a substance containing an acidic group having a pKa of 9 or less (or a precursor group which gives such an acidic group by hydrolysis), more preferably olein described in US Pat. No. 2,983,606. Higher fatty acids such as acids, US Pat. No. 3,362,8
Polymers of acrylic acid, methacrylic acid or maleic acid and their partial esters or acid anhydrides as disclosed in No. 19; acrylic acid as disclosed in French Patent No. 2,290,699 Acrylic ester copolymers; US Pat. No. 4,139,383 and Research
Disclosure (Research Disclo
Sure) No. Mention may be made of latex-type acidic polymers as disclosed in 16102 (1977).

Others, US Pat. No. 4,088,493
No. 52-153739, 53-1023.
No. 53-4540, 53-4541, 53
The acidic substances disclosed in No. 4542 and the like can also be mentioned.

Specific examples of the acidic polymer include ethylene,
Examples thereof include copolymers of vinyl monomers such as vinyl acetate and vinyl methyl ether with maleic anhydride, and n-butyl esters thereof, copolymers of butyl acrylate and acrylic acid, cellulose acetate, and hydroene phthalate.

The polymer acid may be used alone or in combination with a hydrophilic polymer. Such polymers include polyacrylamide, polyvinylpyrrolidone,
Polyvinyl alcohol (including partially saponified products), carboxymethyl cellulose, hydroxymethyl cellulose,
Examples include hydroxyethyl cellulose and polymethyl vinyl ether. Of these, polyvinyl alcohol is preferable.

Further, a polymer other than the hydrophilic polymer, such as cellulose acetate, may be mixed with the above-mentioned polymer acid. The coating amount of the polymer acid is adjusted by the amount of alkali spread on the photosensitive element. The equivalent ratio of polymer acid to alkali per unit area is preferably 0.9 to 2.0. If the amount of the polymer acid is too small, the hue of the transfer dye is changed or stains are generated on the white background portion, and if it is too large, the hue is changed or the light resistance is deteriorated. A more preferable equivalent ratio is 1.0 to 1.3. When mixed with a hydrophilic polymer, too much or too little hydrophilic polymer will reduce photographic quality. The weight ratio of hydrophilic polymer to polymer acid is 0.
It is 1 to 10, preferably 0.3 to 3.0.

Additives can be incorporated into the layer having a neutralizing function of the present invention for various purposes. For example, hardening agents well known to those skilled in the art for hardening this layer, and polyhydric hydroxyl compounds such as polyethylene glycol, polypropylene glycol, glycerin, etc. for improving the brittleness of the film can be added. Other as needed
Antioxidants, development inhibitors and their precursors can also be added. (E) Neutralization Timing Layer The timing layer used in combination with the neutralization layer is, for example, an alkali such as gelatin, polyvinyl alcohol, a partial acetalization product of polyvinyl alcohol, cellulose acetate, or partially hydrolyzed polyvinyl acetate. Polymers that lower the permeability; latex polymers made by copolymerizing a small amount of hydrophilic comonomers such as acrylic acid monomers to increase the activation energy for alkali permeation; polymers having a lactone ring are useful.

Among them, JP-A-54-136328,
U.S. Pat. Nos. 4,267,262 and 4,009,03
No. 0, No. 4,029,849, and other timing layers using cellulose acetate; JP-A-54-12
No. 8335, No. 56-69629, No. 57-6843.
U.S. Pat. Nos. 4,056,394 and 4,061,
No. 496, No. 4,199,362, No. 4,250,2
No. 43, No. 4,256,827, No. 4,268,60
Latex polymers made by copolymerizing a small amount of a hydrophilic comonomer such as acrylic acid disclosed in US Pat. No. 4, etc .; Polymers having a lactone ring disclosed in US Pat. No. 4,229,516; 56-2573
5, No. 56-97346, No. 57-6842, European Patent (EP) No. 31,957A1, No. 37,
The polymers disclosed in 724A1 and 48,412A1 are particularly useful.

In addition, the materials described in the following documents can also be used. U.S. Pat. Nos. 3,412,893 and 3,45
5,686, 3,575,701 and 3,77
8,265, 3,785,815, 3,84
7,615, 4,088,493, 4,12
3,275, 4,148,653, 4,20
1,587, 4,288,523, 4,29
No. 7,431, Detailed Patent Application (OLS) 1,622,9
No. 36, No. 2, 162, 277, Research
Disclosure 15162 No. 151 (1
976).

JP-A-59-202463, US Pat. Nos. 4,297,431, 4,288,523, 4,201,587, 4,229,516, and JP-A 55- No. 121438, No. 56-166212, No. 55-41490, No. 55-54341, No. 56-.
102852, 57-141644, 57-1
No. 73834, No. 57-179841, West German Patent Application Publication (OLS) 2,910,271, European Patent Application Publication No. 31,957A1, Research Disc.
loss No. 18452 etc. can be mentioned.

The neutralization timing layer may be a single layer or multiple layers. In addition, the timing layer made of these materials,
For example, U.S. Pat. No. 4,009,029, detailed patent application (OLS) 2,913,164, and 3,014,67.
No. 2, JP-A Nos. 54-155837 and 55-1387.
45 and the like, development inhibitors and / or their precursors, and US Pat. No. 4,201,5
Hydroquinone precursor disclosed in No. 78,
It is also possible to incorporate other useful additives for photography or their precursors. (F) Release Layer In the present invention, a release layer is provided for peeling off the light-sensitive element and the image-receiving element after processing, if necessary. Therefore, this release layer must be easy to remove after the treatment. As a material for this, for example, JP-A-47-8237
No. 59-220727, 59-229555.
No. 49-4653, U.S. Pat. No. 3,220,83.
5, 4,359,518, JP-A-49-4334.
No. 56-65133, No. 45-24075, U.S. Pat. No. 3,227,550, No. 2,759,825.
Nos. 4,401,746, 4,366,227 and the like can be used. One specific example is a water-soluble (or alkali-soluble) cellulose derivative. For example, hydroxyethyl cellulose, cellulose acetate-phthalate, plasticized methyl cellulose, ethyl cellulose, cellulose nitrate, carboxymethyl cellulose, and the like. Another example is various natural polymers such as alginic acid, pectin, and gum arabic. Also, various modified gelatins such as acetylated gelatin and phthalated gelatin can be used. Yet another example is a water-soluble synthetic polymer. For example, polyvinyl alcohol,
It is polyacrylate, polymethylmethacrylate, polybutylmethacrylate, or a copolymer thereof.

The release layer may be a single layer or may be composed of a plurality of layers as described in, for example, JP-A-59-220727 and JP-A-60-60642. (G) Binder A hydrophilic binder is preferably used as the binder of the constituent layers of the light-sensitive element and the image-receiving element. As an example thereof, Japanese Patent Laid-Open No. 62-62
The compounds described on pages (26) to (28) of No. 253159 can be mentioned. Specifically, a transparent or translucent hydrophilic binder is preferable, and for example, gelatin, proteins such as gelatin derivatives or cellulose derivatives, natural compounds such as polysaccharides such as starch, gum arabic, dextran and pullulan, and polyvinyl alcohol, Examples thereof include polyvinylpyrrolidone, acrylamide polymer, and other synthetic polymer compounds. Also, JP-A-62-245
Superabsorbent polymer described in No. 260 or the like, that is, -CO
OM or -SO ₃ M (M is a hydrogen atom or an alkali metal) copolymer of homopolymer or a vinyl monomer together or with other vinyl monomers of the vinyl monomer having a (e.g. sodium methacrylate, ammonium methacrylate, Sumitomo Chemical (Sumikagel L-5H manufactured by Co., Ltd.)
Also used. These binders can be used in combination of two or more.

In the present invention, the coating amount of the binder is 1
It is preferably 20 g or less per m ² , particularly 10 g or less, and more preferably 7 g or less. The constituent layers (including the back layer) of the light-sensitive element or the image-receiving element are dimensionally stabilized,
Various polymer latices may be contained for the purpose of improving physical properties of the film such as curling prevention, adhesion prevention, film cracking prevention, and pressure increase / decrease prevention. Specifically, JP-A-62-1
No. 245258, No. 62-136648, No. 62-1
Any of the polymer latices described in 10066 and the like can be used. In particular, when a polymer latex having a low glass transition point (40 ° C. or less) is used in the mordant layer, cracking of the image receiving 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. (H) Hardener As the hardener used in the constituent layers of the light-sensitive element and the image-receiving element,
U.S. Pat. No. 4,678,739, column 41, JP-A-59
-116655, 62-245261, 61-
Examples include hardeners described in 18942 and the like. More specifically, aldehyde hardeners (formaldehyde etc.), aziridine hardeners, epoxy hardeners, vinyl sulfone hardeners (N, N'-ethylene-bis (vinylsulfonylacetamide)) Ethane, etc.), N-methylol type hardeners (dimethylol urea, etc.), or polymer hardeners (compounds described in JP-A-62-234157). (I) Others In the constituent layers of the light-sensitive element and the image-receiving element, various surfactants can be used for the purpose of coating aid, improvement of peeling property, improvement of sliding property, prevention of electrostatic charge, acceleration of development and the like. Specific examples of the surfactant are disclosed in JP-A-62-173463 and JP-A-62-1834.
No. 57 etc.

The constituent layers of the light-sensitive element and the image-receiving element may contain an organic fluoro compound for the purpose of improving slipperiness, preventing electrification and improving peelability. Typical examples of organic fluoro compounds include fluorine-containing surfactants described in JP-B No. 57-9053, columns 8 to 17, JP-A Nos. 61-20944 and 62-135826, and fluorine oils. And the hydrophobic fluorine compound such as solid fluorine compound resin such as oily fluorine compound or tetrafluoroethylene resin.

A matting agent can be used in the light-sensitive element and the image-receiving element. Matting agents such as silicon dioxide, polyolefins, polymethacrylates, etc.
88256 (29) page, benzoguanamine resin beads, polycarbonate resin beads, A
Japanese Patent Laid-Open Nos. 63-274944 and 63-4, such as S resin beads.
There are compounds described in 3-274952.

In addition, the constituent layers of the light-sensitive element and the image-receiving element may contain an antifoaming agent, an antibacterial / antifungal agent, colloidal silica and the like. Specific examples of these additives are disclosed in JP-A-61-1
88256, pages (26) to (32).

In the present invention, an image formation accelerator can be used in the light-sensitive element and / or the image-receiving element. 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. From the physicochemical function, such as base or base precursor, nucleophilic compound, high boiling organic solvent (oil), surfactant, silver or silver ion It is classified as a compound that interacts with. However, these substance groups generally have a composite function, and usually have some of the above-mentioned promoting effects together. For details of these, see US Pat. No. 4,6.
No. 78,739, columns 38-40. (J) Processing Composition The processing composition used in the present invention is one which is uniformly spread on the photosensitive element after exposure of the photosensitive element, and the photosensitive layer is developed by the components contained therein. Therefore, in the composition, deterioration of alkali, thickener, light-shielding agent, electron transfer agent (developer), and further development accelerator, development inhibitor and developer for controlling development is prevented. It contains an antioxidant and the like. A light-shielding agent can be included in the composition, if necessary.

Alkali is sufficient to adjust the pH of the liquid to 12 to 14, and includes alkali metal hydroxides (eg sodium hydroxide, potassium hydroxide, lithium hydroxide),
Examples thereof include alkali metal phosphates (for example, potassium phosphate), guanidines, and quaternary amine hydroxides (for example, tetramethylammonium hydroxide). Of these, potassium hydroxide and sodium hydroxide are preferable.

The thickener is used for uniformly developing the treatment liquid.
It is also necessary in order to maintain close contact between the light-sensitive element and the image-receiving element during development and to prevent the processing liquid component from remaining on the surface of the image-receiving element during peeling.

For example, an alkali metal salt of polyvinyl alcohol, hydroxyethyl cellulose or carboxymethyl cellulose is used, preferably hydroxyethyl cellulose or sodium carboxymethyl cellulose.

When the image receiving element is a transparent support and does not have a light shielding function, a light shielding agent can be contained.
As the light-shielding agent, either a dye or a pigment, or a combination thereof can be used as long as it does not diffuse to the dye image-receiving layer to generate stain. Carbon black is a typical example, but a combination of titanium white and a dye may also be used. The dye may be a temporary light-shielding dye that becomes colorless after a certain time of treatment.

As the preferable electron transfer agent, any electron transfer agent can be used as long as it cross-oxidizes the electron donor and does not substantially produce stain even when oxidized. Such electron transfer agents may be used alone or in combination of two or more kinds, and may be used in a precursor type. Specific examples of these electron transfer agents include aminophenols and pyrazolidinones. Of these, pyrazolidinones are particularly preferable because they produce less stain.

For example, 1-phenyl-3-pyrazolidinone, 1-p-tolyl-4,4-dihydroxymethyl-3
-Pyrazolidinone, 1- (3'-methyl-phenyl)-
4-methyl-4-hydroxymethyl-3-pyrazolidinone, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidinone, 1-p-tolyl-4-methyl-
4-hydroxymethyl-3-pyrazolidinone, and the like.

The above treatment composition is described in US Pat.
3,181, 2,643,886, 2,65
No. 3,732, No. 2,723,051, No. 3,05
6,491, 3,056,492, 3,15
It is preferable to fill and use a container that can be ruptured by pressure as described in No. 2,515. (K) Structure of photosensitive material A color diffusion transfer instant photosensitive material can be composed by combining the above-mentioned elements.

The color diffusion transfer instant film unit is roughly classified into a peeling type and a peeling-free type. In the peeling type, a photosensitive layer and a dye image receiving layer are coated on different supports, and after exposure to an image, the photosensitive layer is exposed. The element and the dye image receiving element are superposed, the processing composition is developed therebetween, and the dye image receiving element is peeled off to obtain a dye image transferred to the dye image receiving layer.

On the other hand, in the peeling-free type, a dye image-receiving layer and a photosensitive layer are coated between a transparent support and the other support, but the image-receiving layer and the photosensitive layer are the same transparent support. There are a form applied and a form applied on another support.

In the former case, a white reflective layer is coated between the image-receiving layer and the photosensitive layer, and in the latter case, the processing composition developed between the image-receiving layer and the silver halide emulsion layer is used. By containing a white pigment, the dye image transferred to the image receiving layer can be observed with reflected light.

In the peeling type, the image-receiving element and the light-sensitive element are generally attached to different supports, and in addition to the dye-image-receiving layer as an image-receiving material, a layer having a neutralizing function, a neutralizing timing layer, and a peeling layer if necessary. Is provided. As the support of the image receiving material,
It is preferable to use a white support having a light shielding function. On the other hand, the photosensitive material is provided with a layer having a neutralizing function and a neutralization timing layer, if necessary, in addition to the photosensitive layer. As the support of the photosensitive material, it is preferable to use a black support having a light shielding function. Regarding the film unit, JP-A-61
The thing described in No. 47956 can be applied.

Further, as a peeling type, Japanese Patent Laid-Open No. 1987/1987.
As described in Japanese Patent Application No. 47 and Japanese Patent Application No. 1-68749, a film unit in which a dye image-receiving layer / a release layer / a photosensitive layer are attached to the same support in this order can be applied.

The release-free type is a cover sheet material in which a layer having a neutralizing function and a neutralization timing layer are provided on another transparent support when the photosensitive layer and the image receiving layer are provided on the same support. Is used. Regarding the film unit, those described in JP-B-46-16356 and JP-A-50-13040 can be applied.

[0164]

【Example】

(1) Preparation of silver halide emulsion Preparation of tabular silver bromide emulsion: 1 liter of 0.8% by weight gelatin aqueous solution containing 0.05M potassium bromide,
While stirring it, 30 cc of a 0.40 M silver nitrate aqueous solution and a 0.15 M potassium bromide aqueous solution are added by the double jet method. During this time, the gelatin aqueous solution is at 30 ° C
Was kept at. After the addition, the temperature was raised to 75 ° C. After the addition, 30 g of gelatin was added.

After the addition of the first step, 90 cc of 0.4 M silver nitrate aqueous solution was added. In addition, in the following 65 minutes 176 g of silver nitrate was added at an accelerated flow rate (the flow rate at the end was 21 times the flow rate at the start). During this period, pBr was kept at 2.40.

The particles thus formed (hereinafter referred to as seed crystals) were washed by a conventional flocculation method, gelatin was added thereto, and the pH was adjusted to 6.5 at 40 ° C. and pA at 40 ° C.
It was adjusted to be g 8.0.

The seed crystal emulsion thus prepared is Emulsion 1
It contained 203 g of silver halide per kg. The seed crystal was dissolved in 3.7 liter of an aqueous solution containing 0.8% by weight of gelatin, and the temperature was kept at 75 ° C. and pBr 1.60. After this, 107 g of silver nitrate was added while keeping pBr at 1.60.

Further, after adding ammonium thiocyanate, silver nitrate was added so that pBr would be 2.70. Then, the emulsion was cooled to 35 ° C., washed by a conventional flocculation method, added with gelatin, adjusted to pH 6.5 and pAg 8.5 at 40 ° C., and then stored in a cool dark place. The tabular grains had an average projected area circle-equivalent diameter of 1.3 μm and an average thickness of 0.25 μm. This emulsion also contained 213 g of silver halide per kg of emulsion. Preparation of emulsion for red light-sensitive layer: tabular silver bromide emulsion 1k in the previous period
The temperature of g was adjusted to 55 ° C., sodium benzenethiosulfonate was added, and then the sensitizing dyes S-1 and S-2 described below were added. Furthermore, 4-hydroxy-6-methyl-1,3,3
After adding 3a, 7-tetrazaindene, Na ₂ S
Chemical aging was carried out by adding O ₃ , KAuCl ₄ and potassium thiocyanate. When the maximum sensitivity was reached, the temperature was lowered to terminate the chemical sensitization, and an emulsion for the red photosensitive layer was prepared. Preparation of emulsion for green photosensitive layer: An emulsion for green photosensitive layer was prepared in the same manner as the emulsion for red photosensitive layer except that the sensitizing dye was changed to S-3. Preparation of emulsion for blue photosensitive layer: An emulsion for blue photosensitive layer was prepared in the same manner as the emulsion for red photosensitive layer except that the sensitizing dye was changed to S-4.

[0169]

[Chemical 31]

[0170]

[Chemical 32]

(2) Preparation of Dye-donor Compound and Electron Donor Gelatin Dispersion A method for preparing a cyan dye-donor compound and electron donor gelatin dispersion is described below.

The cyan dye-donor compound (1) was added to 2.12
g, electron donor (1) 0.85 g, high boiling organic solvent (1) 0.35 g, surfactant (1) 0.7 g, ethyl acetate 9.5 ml, and heated to about 60 ° C. to dissolve. A uniform solution was prepared. 14% of this solution and lime-processed gelatin
After 4.5 g of the solution and 16 ml of water were mixed with stirring, the mixture was dispersed with a homogenizer at 10,000 rpm for 10 minutes. This dispersion is called a cyan dye-donor compound dispersion.

A gelatin dispersion of a magenta dye-donor compound and an electron donor was prepared in the same manner except that the dye-donor compound was changed to the magenta dye-donor compound (1). A gelatin dispersion of the yellow dye-donor compound and the electron donor was prepared in the same manner except that the dye-donor compound was changed to the yellow dye-donor compound (1).

[0174]

[Chemical 33]

[0175]

[Chemical 34]

(3) Preparation of Diffusion Resistant Reducing Agent Gelatin Dispersion for Intermediate Layer The method for adjusting the diffusion resistant reducing agent gelatin dispersion for the intermediate layer is described below. Diffusion resistant reducing agent (1) 23.5
g, 6.9 g of the diffusion resistant reducing agent (2) and 8.5 g of the high boiling point organic solvent (1) were dissolved in 30 ml of ethyl acetate by heating at about 60 ° C. to obtain a uniform solution. This solution, 100 g of a 10% solution of lime-processed gelatin, 15 ml of a 5% aqueous solution of surfactant (2), and 16 ml of water were stirred and mixed, and then dispersed with a homogenizer at 10,000 rpm for 10 minutes.

Further, the photosensitive element 1 having the constitution shown in Table A below.
01 was created.

[0178]

[Table 1]

[0179]

[Table 2]

[0180]

[Table 3]

The compounds used in the table are shown below.

[0182]

[Chemical 35]

[0183]

[Chemical 36]

[0184]

[Chemical 37]

Further, the high boiling point solvent (1) of the first layer of the photosensitive element 101 was replaced with the compounds shown in Table B below to prepare a photosensitive element 102 as a comparative example.

[0186]

[Table 4]

Next, the high boiling point solvent (1) in the first layer of the photosensitive element 101 was changed to the compound shown in Table C below, and the photosensitive element 20 was replaced.
1-207 were created.

[0188]

[Table 5]

The image receiving element was prepared as follows. Paper support: A paper having a thickness of 150 μm laminated with polyethylene of 30 μm on each side. To the polyethylene on the image receiving layer side, 10% by weight of titanium oxide is dispersed and added to polyethylene. Back side: (a) Carbon black 4.0 g / m ² , gelatin 2.
Light-shielding layer of 0 g / m ² . (B) Titanium oxide 8.0 g / m ² , gelatin 1.0 g /
m ² white layer. (C) Protective layer of gelatin 0.6 g / m ² .

The coating is carried out in the order of (a) to (c), and the film is hardened with a hardening agent. Image-receiving layer side: (1) A neutralizing layer containing 22 g / m ^{2 of} an acrylic acid-butyl acrylate (molar ratio 8: 2) copolymer having an average molecular weight of 50,000. (2) Cellulose acetate having an acetylation degree of 51.3% (the weight of acetic acid released by hydrolysis is 0.513 g per 1 g of the sample), and styrene-maleic anhydride having an average molecular weight of about 10,000 (molar ratio). 1: 1) The second timing layer containing 4.5 g / m ^{2 of the} copolymer in a weight ratio of 95: 5. (3) An intermediate layer containing 0.4 g / m ^{2 of} poly-2-hydroxyethyl methacrylate. (4) Styrene / butyl acrylate / acrylic acid / N
A methylol acrylamide in a weight ratio of 49.7 / 42.
The polymer latex emulsion-polymerized by 3/4/4 and the polymer latex emulsion-polymerized by methylmethacrylate / acrylic acid / N-methylol acrylamide at a weight ratio of 933/4 have a solid content ratio of 6: 4. A first timing layer that is blended and contains 1.6 g / m ^{2 of} total solids. (5) 3.0 g of a polymer mordant having the repeating unit of the following chemical formula 39 using the compound of the following chemical formula 38 as a coating aid.
An image receiving layer coated with m ² and 3.0 g / m ² of gelatin.

[0191]

[Chemical 38]

[0192]

[Chemical Formula 39]

(6) A protective layer coated with 0.6 g / m ² of gelatin. The above (1) to (6) are applied in this order and hardened with a hardener. The formulation of the treatment liquid is shown below.

A destructible container was filled with 0.8 g of a treatment liquid having the following composition. 1-p-tolyl-4-hydroxymethyl-4-methyl-3-pyrazolidone 10.0 g 1-phenyl-4-hydroxymethyl-4-methyl-3-pyrazolidone 4.0 g potassium sulfite (anhydrous) 4.0 g hydroxy Ethyl cellulose 40 g Potassium hydroxide 64 g Benzyl alcohol 2.0 g Water was added to bring the total amount to 1 kg. The photosensitive elements 101 to 102 and 201 to 207 were exposed from the emulsion layer side through B, G, R and gray color separation filters. The image receiving layer side of the image receiving element material was superposed, and the treatment liquid was spread between both materials with the aid of a pressure roller so that the thickness became 60 μm. Processing is 25
C., and the photosensitive material and the image receiving element were peeled off after 1.5 minutes.

The cyan reflection densities of the maximum density portion and the minimum density portion of the gray portion transferred to each image receiving element were measured with a color densitometer. The results are shown in Table D.

[0196]

[Table 6]

Example 2 In the photosensitive element 101 of Example 1, 96 mg / m ² of 1-phenyl-4-hydroxymethyl-4-methyl-3-pyrazolidone was added to each of the intermediate layers of the third and seventh layers. To prepare a photosensitive element 301.

Further, the high boiling point solvent (1) of the first layer of the photosensitive element 301 was replaced with the compounds shown in Table E below to prepare a photosensitive element 302 as a comparative example.

[0199]

[Table 7]

Next, the high boiling point solvent (1) of the first layer of the photosensitive element 301 was changed to the compound shown in Table F below, and the photosensitive element 40 was replaced.
1 to 407 were created.

[0201]

[Table 8]

Table G shows the results of measuring the cyan reflection densities of the maximum density part and the minimum density part of the gray part of the obtained image by performing the same processing as in Example 1.

[0203]

[Table 9]

From Tables D and G, it was found that according to the present invention, excellent images having a low minimum density and a high maximum density can be obtained. Example 3 Similarly, the high boiling point solvent (1) of the fifth layer of the photosensitive element 101 was replaced with the compound shown in Table C, and the same treatment as in Example 1 was carried out to obtain a gray portion of the obtained image. When the magenta reflection densities of the maximum density portion and the minimum density portion of were measured, similar effects were obtained.

[0205]

According to the present invention, it has been found that an excellent image having a low minimum density and a high maximum density can be obtained.

Claims (1)

[Claims] 1. A support comprises at least a reducible dye-donating compound represented by the following general formula (I), which releases a diffusible dye when reduced, an electron donor, and a photosensitive halogenated emulsion. And PH containing an electron transfer agent after exposure
A color diffusion transfer light-sensitive material, which is subjected to development treatment with 12 or more alkaline developers to form an image, further containing at least one compound represented by the following general formula (II). Photosensitive material. General formula (I) PWR- (Time) _t -Dye In the formula, PWR is reduced to give-(Tim).
e) represents a group that releases _t- Dye. Time is PWR
Represents a group that is released as-(Time) _t -Dye and then releases Dye through a subsequent reaction. t is 0
Or represents an integer of 1. Dye represents a dye or a precursor thereof. Formula (II) R ¹ -COOR ² wherein R ¹ and R ² are represented by the following general formula (III) or (I
It represents a group represented by V). [Chemical 1] [Chemical 2] R ¹¹ to R ¹⁸ in the general formulas (III) and (IV) represent a substituent (including a hydrogen atom) on a carbon atom. However, R ¹ and R ² are the substituents R ¹¹ and R represented by the general formula (III).
Aliphatic Taft constants (σ ^* value) of ¹² and R ¹³ , Taft constants (σ ⁻ value) of R ¹⁴ and R ¹⁸ of the general formula (IV), R
Hammett constant (σ _m value) of ¹⁵ and R ¹⁷ , Ha of R ¹⁶
The sum of the Mmet constants (σ _p values) is selected to be 0 or more.