DE2459059A1 - Dye diffusion transfer material contg. poly-hydroxy-benzene cpd. - as auxiliary developer, for good contrast and stain-free highlights - Google Patents

Abstract

Photographic material for the dye diffusion transfer process has at least 2 colour image-forming units on a base, each unit consisting of a light-sensitive Ag halide emulsion and an associated material giving a colour image, at least one of these layers contg. cpd(s)(I) (in which R1, R2 and R3 are (pref. 1-18C) alkyl, (1-8C) alkoxy, opt. substd. aryl or aralkyl, halogen, CN, SH, arylthio, (1-8C) alkyl-thio, OH or H; pref. R1, R2 and R3 are OH). (I) can be present in the dye developer layer Ag halide emulsion, spacer coat and/or supercoat. (I) pref. is used as emulsified dispersion in an alkali-philic, hydrophobic solvent (II) of formula R5CO-NR4-CH2-CHX-COOH (in which X is H or Me; R4 and R5 are alkyl gps. contg. a total of 7-11C). (I) acts as auxiliary Ag halide developer, giving a transferred picture with good contrast and free from staining in the highlights.

Description

Photographic materials for the color diffusion transfer process The invention relates to a photographic material for the color diffusion transfer process and is particularly concerned with a photographic material for use in a color diffusion transfer method in which color developers are used.

According to the invention, a photosensitive element for a color diffusion transfer process, which comprises a support with at least two silver halide emulsion layers applied thereon, each having a color developer attached thereto, at least one of the layers on the support containing at least one polyhydroxybenzene derivative of the formula as auxiliary silver halide developing agent: wherein R1, R2 and R3 represent an alkyl group, an alkoxy group, an aryl group, an aralkyl group, a halogen atom, a cyano group, a mercapto group, an arylthio group, an alkylthio group, a hydroxyl group or a hydrogen atom, and represent a photographic film unit for the color diffusion transfer process, which a photosensitive element comprising a support having thereon at least two silver halide emulsion layers, each of which contains a dye developer connected thereto, an image-receiving element for receiving the dyes transferred by the photosensitive element, and an alkaline liquid processing composition for developing the silver halide layers and for transferring the dyes from the photosensitive element to the image recording element, wherein at least one of the layers of the sensitive element or the treatment composition contains at least one such polyhydroxybenzene .

A diffusion transfer photographic process using color developers, d. H. Dyes that are silver halide developing agents are used, is in various patents such as U.S. Patent 2,983 606 and British Patent 804,971 specified. Like in this one Patent specifications indicated are the exposed light-sensitive silver halide emulsion layers Developed in the presence of color developers, resulting in the formation of an image-like Distribution of unreacted, unoxidized dye developers as a function of exposure and development results. The unreacted unoxidized dye developers are diffusible and therefore the image-like distribution of color developers becomes at least partially transferred to an image pickup element which is applied to the developed photosensitive Element is placed.

In a particularly useful embodiment of the diffusion transfer process becomes a photosensitive element with combinations of silver halide emulsions and dye developers exposed and then a liquid processing composition onto the surface of the photosensitive element, for example by immersion s applied by drawing or spraying. Before, during or after application the liquid treatment composition on the exposed photosensitive element the photosensitive element placed on an image recording element, which with is dyeable with color developers. In a preferred embodiment, the photosensitive Element is a silver halide emulsion layer and an adjacent layer on the opposite side of this with respect to the side of the incident light during exposure, this adjoining layer having a dye developer, associated with the silver halide in the silver halide emulsion layer. The photosensitive element is placed on the image recording element in such a way that the silver halide emulsion layer in terms of area of the image receiving layer of the Image pickup element stands opposite and a liquid treatment mass is formed as a thin layer between the photosensitive element and the image receiving element or thin film spread. The liquid treatment mass diffuses into the silver halide emulsion layer and the layer containing the dye developer, so that the development of the developable silver halide begins, causing the dye developer which the silver halide is developed, made immobile.

This immobility is due in part to a decrease in mobility or the solubility of the oxidation product of the dye developer in comparison attributable to the little of the unoxidized dye developer. It is also to take into account that this immobility is partly due to a local Decreasing alkalinity is dependent on the function of development.

Because the unreacted dye developer in the undeveloped areas of the silver halide emulsion layer is diffusible, becomes an imagewise distribution of the mobile unoxidized dye developer as a function of exposure and Development trained. The imagewise distribution of the diffusible unoxidized Dye developer is at least partially transferred to an image receiving layer, which rests on the silver halide emulsion layer, with the transport of the dye developer clearly different from those of the less mobile oxidized dye developer differs so that the transferred image on the image receiving layer as an image is trained. When a photosensitive element with differently sensitized Silver halide emulsion layers, each of the silver halide emulsion layers tied together hereby contains a dye developer, essentially complementary color has, has, d. H. a photosensitive element comprising a support having one thereon located red-sensitive silver halide emulsion layer, associated with it a cyan color developer; a green-sensitive silver halide emulsion layer has, associated with this, a magenta dye developer and a blue-sensitive one Silver halide emulsion layer has a yellow dye developer attached to it, is treated by a liquid treatment mass after exposure, j each of these dye developers in the exposed areas of the silver halide emulsion layer, with which the dye developer is connected, oxidized and immobilized there. The remaining dye developers in the unexposed areas of the silver halide emulsion layers are transferred to the image pickup element by diffusion.

Therefore, if there is a large amount of the unoxidized dye developer in sufficiently exposed negative areas according to the highlight parts of an object are present, the unoxidized dye developers diffuse in the exposed negative areas in the image recording material as unoxidized, in the unexposed negative areas corresponding to the dark parts of the object present unoxidized dye developers and provide a transferred image a high minimum density and have indistinct dark and light areas.

Typical dye developers are shown in U.S. Patents 3,225 001.2 992 106, 3 297 441, 3 134 762, 3 236 643, 3 134 673, 3 236 645, 3 134 764, 3 134 672. 3 134 765, 3 183 089, 3 135 734, 3 135 604, 3 173 906, 3 222 169, 3 183 090, 3 201 384, 3 142 565, 3 218 312, 3 230 086, 3 262 924, 3 275 617, 3 077 402, 3 282 913, 3 141 772, 3 299 041, 3 309 199, 2 983 605, 3 047 386, 3 076 820, 3 173 929, 3 230 083, 3 236 864, 3 239 339, 3 252 969, 3 253 001, 3 288 778, 3 209 016, 3 135 606, 3 076 808, 3 126 280, 3 236 865, 3 135 605, 3 255 205, 3 131 061, 3 347 673, 3 347 672, 3 246 016, 3 245 790, 3 086 005, 3 295 973, 3 307 947, 3,230,082 and 3,230,085. For example, are the cyan dye developer 1,4-bis (alpha; -methyl-ß-hydroquinone pylamino) -5,8-dihydroxyanthraquinone, the magenta dye developer 4-propoxy-2-ffi - (β-hydroquinonyl) -phenylazo-1-naphthol and 1-phenyl-3-N-n-hexylcarboxyamido-4-Z5-2 ', 5'-dihydroxbrphenethyl) -phenylazo] -5-pyrazolone weak developing agents for silver halides, even if they are below proportionately strongly alkaline conditions of a pH of about 13 can be used. if therefore these dye developers are used, the desired maximum Density, graduation and sensitivity not preserved. Since the immobility of the Dye developer is a function of the development of the silver halide emulsion, shows the transferred image obtained by this method due to diffusion undesirably high minimum density, low maximum density and low contrast in the highlight areas. These drawbacks are in part the result of the weak Developing activity of dye developers as silver halide developing agents, the ineffective use of the dye developer surrounding the silver halide grains and other factors.

Furthermore, a silver halide emulsion layer is used in a multi-color system not only through a dye developer with a practically complementary color the sensitive one Main wave length range of the silver halide emulsion layer, but also by dye developers which are combined with other silver halide emulsion layers connected, developed. For example, a magenta dye developer is used in related relationship with a green-sensitive silver halide emulsion used, j however, the magenta dye developer partially diffuses into the blue-sensitive one Silver halide emulsion layer and the red-sensitive silver halide emulsion layer and there develops the silver halides and becomes immobile in these layers made, resulting in a transferred color image with less magenta dye.

The insufficient immobilization of the dye developer, which a result of the development of the silver halide emulsion layer and also insufficient Development of the silver halide emulsion layer in the exposed area is an undesirably high minimum density in the highlight part a reduction in the Image contrasts and an immobilization of other ones to be transmitted by diffusion Dye developer by removing interference in some silver halide emulsion layers caused, so that ultimately there is a sharp decrease in quality of the positive color image obtained.

In Japanese Patent Publications 4839/1960, 1738/1960, 10240/1959, 2241/1962 it is stated that the disadvantages described above can be improved to a certain extent if a colorless silver halide auxiliary developing agent, like 1-phenyl-3-pyrazolidone to a liquid treatment mass to favor the development of the silver halide and favoring the immobilization. ena the color developer is added in the photosensitive member. So teaches z. For example, Japanese Patent Publication 17393/1960 is a combination from 1-phenyl-3-pyrazolidone and another compound with silver halide developing activity and that some of these compounds are incorporated into a photosensitive element can be. However, the images obtainable by this method are insufficient and especially when a silver halide auxiliary developing agent for a multicolor and multilayer photosensitive member is used, development proceeds does not proceed so sufficiently that each of the dye developers is not in the necessary To the extent it is rendered immobile and development does not progress with the necessary Extent in each specific silver halide emulsion layer. Therefore it is difficult to obtain sufficiently transferred multicolor images.

Furthermore, it has often been observed that these dye developers partially are transported on the image pickup element and stains on the transferred Create color images.

In another known method, one becomes practically colorless Hydroquinone derivative in a silver halide emulsion layer, one the color developer contains tending layer, an intermediate layer or a protective layer of the photosensitive Element incorporated as a silver halide auxiliary developing agent. In this procedure however, there is a disadvantage that part of the hydroquinone derivative becomes the highlight part of the transferred image is transported and the density (minimum density of the tip light part of the transferred color image increased to an undesirable value.

The object of the present invention is to fix each the dye developer to the necessary extent and at the required speed in each specific silver halide emulsion layer when the Silver halide auxiliary developing agent according to the invention for multicolor and multilayer photosensitive elements can be used.

When the silver halide grains in the exposed areas of the photosensitive Layer of a photosensitive element can be sufficiently developed the dye developers usually according to the amount of silver developed immobilized, so that the amount of transferred to the image pickup element Dye developer is lower in proportion to the amount of silver developed will. In highly developed areas (these areas are called "highlight part or highlight parts ") are ideally no dye developers transported onto the image pickup element. However, when the silver halide grains are sufficiently developed in the heavily exposed areas, the phenomenon occurs on that the dye developer in the highlight part is insufficiently immobile are made and seep into the image pickup element,. This appearance will commonly referred to as "seepage".

An object of the invention is therefore a color photographic one Material for the diffusion transfer process, thereby providing a sufficiently high maximum density is achieved in the shadow part of the transferred color image.

Another object of the invention is a color photographic one Material for the diffusion transfer process which has a sufficiently low minimal.

Provides density in the highlight part of the transferred color image.

Another object of the invention is a color photographic one Material for the diffusion transfer process which produces a transferred color image with less unwanted spots in the highlight part of the transmitted Image made by transferring the silver halide auxiliary developing agent and provide a low minimum density in the highlight part.

Another object of the invention is a color photographic one Material for diffusion transfer process using such silver halide auxiliary developing agents contains, which are effective in securing the dye developer during development of color photographic material.

Another object of the invention is a color photographic one Material for diffusion transfer process, which is a polyhydroxybenzene derivative for the efficient development of those in the photosensitive silver halide layer or contains multiple layers of silver halide grains; while effective that The occurrence of seepage of the color developer is prevented.

According to one embodiment of the present invention, this results a photographic material for color diffusion transfer process which comprises a carrier with at least two image-providing units located thereon, each being a combination of a photosensitive silver halide emulsion layer and a color image forming material bonded to the photosensitive Comprising silver halide in the emulsion layer, at least one of the layers contains on the carrier at least one polyhydroxybenzene as auxiliary developing agent.

A second embodiment according to the invention comprises a photographic one obscurity to the diffusion color transfer process, including a photosensitive one Materials, that on a support at least two silver halide emulsion layers, each containing a color-bonded color developer, an image receiving material for the absorption of dyes that appear on the photosensitive material during development of the photosensitive material, and an alkaline liquid Treatment composition for developing the silver halide emulsion layers of the photosensitive Material, being a transfer of the dyes from the photosensitive material to the image receiving material; here contains at least one of the layers of the photosensitive material or the processing composition, at least one polyhydroxybenzene.

The above-described polyhydroxybenzene used as an auxiliary developing agent according to the invention comprises at least one polyhydroxybenzene represented by the following general formula (1) wherein R1, R2 and R3, which may be the same or different, represent an alkyl group, an alkoxy group, an aryl group, an aralkyl group, a halogen atom, a cyano group, a mercapto group, an arylthio group, an alkylthio group, a hydroxyl group or a hydrogen atom.

Compounds corresponding to the above general formula (I), how they are used according to the invention are explained in detail below.

The radicals R1, R2 and R3 in the general formula (I) can be identical or be different. Preferred examples of alkyl groups corresponding to R1, R2 and R3 are alkyl groups with 1 to 8 carbon atoms, such as methyl groups, ethyl groups, Propyl groups, isopropyl groups, butyl groups, isobutyl groups, sec-butyl groups, tert-butyl groups, pentyl groups, isopentyl groups, tert-pentyl groups, hexyl groups, 2-ethylhexyl groups, 1,1,3,3-tetramethylbutyl (tert-octyl) groups, octylcyclopentyl groups and cyclohexyl groups. Examples of suitable alkoxy groups for the radicals R1 ,. R2 and R3 are groups corresponding to the formula -OR, in which R is an alkyl group with 1 to 8 carbon atoms as indicated above for R1, R2 and R3. The aryl groups and the aralkyl groups for the radicals R1, R2 and R3 can be both be unsubstituted as well as substituted. Preferred examples of unsubstituted Aryl groups for the radicals R1 'R2 and Re are phenyl groups and Naphthyl groups and examples of unsubstituted aralkyl groups for the radicals R1, R2 and R3 are benzyl groups and phenethyl groups. Examples of substituents of the substituted aryl groups and substituted aralkyl groups for the radicals R1, R2 and R3 include, for example, hydroxyl groups, halogen atoms such as chlorine atoms, bromine atoms or iodine atoms, cyano groups, mercapto groups, nitro groups, alkyl groups with 1 to 8 carbon atoms as stated above, alkoxy groups, aryl groups such as phenyl groups or naphthyl groups and aralkyl groups such as benzyl groups or phenethyl groups. Examples of suitable halogen atoms for the radicals R1, R2 and R3 are chlorine atoms, Bromine atoms and iodine atoms. Examples of suitable arylthio groups for the radicals R1, R2 and R3 are phenylthio groups and naphthylthio groups, and preferred examples for alkylthio groups for the radicals R1, R2 and R3 are each with alkyl groups with 1 to 8 carbon atoms as indicated above, substituted thio groups.

Specific examples of the polyhydroxybenzenes according to FIG General formula (I) given above are e.g. B. 1,2,4-trihydroxy-5-phenylbenzene, 1,2,4-trihydroxy-5- (1 ', 1', 3 ', 3'-tetramethylbutyl) benzene, 1,2,4-trihydroxy-5- (4'-methylphenyl) benzene, 1,2 , 4-trihydroxy-5,6-dichlorobenzene, 1,2,4-trihydroxybenzene, 1,2,4-trihydroxy-5-phenylthiobenzene, 1,2,4-trihydroxy-5,6-dimethylbenzene, 1,2,4-trihydroxy-5-benzylbenzene, 1,2,4-trihydroxy-5-cyclohexylbenzene, 1,2,4-trihydroxy-5- (4'-chlorophenyl) benzene, 1,2,4-trihydroxy-5- (3'-nitropenyl) benzene and 1,2,4,5-tetrahydroxy-6-methylbenzene. These examples are only for the purpose of illustrating the invention and are not as a limitation.

When these polyhydroxybenzene derivatives according to the invention are used as auxiliary developing agents be used, it was surprisingly found that the Polyhydroxybenzene those in the light-sensitive silver halide emulsion layer present silver halide grains to reduce the occurrence of seepage and further, there has been practically no reduction in the maximum density observed.

It was also found that if an alkaline liquid treatment mass is spread over the surface of the exposed photosensitive element, the polyhydroxybenzene contained in the photosensitive element used according to the invention the exposed silver halide grains are developed to a remarkable extent and thus has a significantly higher activity than the usual dihydroxybenzene derivatives, which are known as silver halide auxiliary developing agents, e.g. B. a 1,4-dihydroxybenzene derivative and 1,2-dihydroxybenzene derivative.

It was also found that the polyhydroxybenzene according to Invention shows high development activity, as can be seen from those listed below Results, and very effective for the diffusion transfer color photographic process when using a practically water-insoluble solvent and / or an oil can be applied because the polyhydroxybenzene derivatives very easily in air or oxidized during the dispersion of the polyhydroxybenzene derivatives in the coating compositions will.

That the polyhydroxybenzene derivatives according to the invention are used as auxiliary silver halide developing agents can be used is an epoch-making invention of great technical nature Meaning which, based on the usual knowledge in the field, would never be expected left.

Those used in the present invention as auxiliary silver halide developing agents Polyhydroxybenzenes, hereinafter referred to briefly as auxiliary developing agents can be in the photosensitive element and / or the image receiving element of the color photographic material for the diffusion transfer process and / or the liquid treatment mass are incorporated. It is advantageous to use the silver halide auxiliary developing agent in at least one of the photographic layers of the photographic material incorporate, for example, a silver halide emulsion layer, the color developer containing layer, an intermediate layer or a protective layer.

Those used as auxiliary developing agents in the context of the invention Eolyhydroxybenzenes are used in alkaliphilic hydrophobic organic solvents dissolved, which are immiscible with the alkaline treatment solution and practical are insoluble in water, and then the solution becomes the auxiliary developing agent dispersed in an aqueous solution of a hydrophilic colloid such as gelatin.

Preferred alkaliphilic hydrophobic organic solvents suitable for that can be used for this purpose include those disclosed in Japanese Patent Publication 15896/1970 specified solvents.

Those used according to the invention for the purpose described above alkaliphilic hydrophobic solvents must be insoluble in water and must be slightly must be soluble in aqueous solutions with a pH higher than about 8.5 have low volatility, must have sufficient solvent properties The photographic emulsions do not and must not dissolve the material adversely affect.

Examples of alkaliphilic hydrophobic solvents which meet the above prescribed requirements are compounds represented by the following general formula where X is a hydrogen atom or a methyl group and R4 and R5 are each an alkyl group having 1 to 10 carbon atoms, all of which may optionally be terminally substituted, where the total number of carbon atoms in the radicals R4 and R is in the range from about 7 to 11 and the radicals can be terminally substituted by halogen atoms, carboxyl groups, sulfo groups (-SO3H) or phenyl groups.

If the total number of carbon atoms of the residues and R5 is less than about 7, the solubility in water increases, while if the total is larger than about 11, the solubility of the alkali-philic hydrophobic solvent solution in processing liquid becomes insufficient during development. Specific examples of compounds corresponding to the above general formula (II) are as follows: z. B. in a weight ratio of about 1: 0.001 to about 1: 1000.

The above-mentioned alkaliphilic hydrophobic solvents of the general formula (II) can be used together with other solvents and examples of such other solvents include methyl acetate, ethyl acetate, Propyl acetate, butyl acetate, isopropyl acetate, ethyl propionate, sec. Butyl alcohol, carbon tetrachloride, Chloroform, benzyl alcohol, 2,3-methylcyclohexanone, 4-methylcyclohexanone, isophcron, Methyl isobutyl ketone, ß-ethoxyethyl acetate, ß-butoxy-ß-ethoxyethyl acetate, tetrahydrofurfuryl adipate, Diethylene glycol monoacetate, methoxytriglycol acetate, acetylacetone, acetone alcohol, Ethylene glycol, diethylene glycol, dipropylene glycol, 2,3-methylcyclohexanone, 4-methylcyclohexanone, Ethylene glycol monomethyl ether acetate, diethylene glycol monobutyl ether, cyclohexanone, Triethyl phosphate, alkyl ester of phthalic acid with fewer than 8 carbon atoms in the alkyl portion, for example Methyl phthalate, ethyl phthalate, Propyl phthalate, n-butyl phthalate, dipropyl phthalate, di-n-butyl phthalate, amyl phthalate, Isoamyl phthalate, and dioctyl phthalate, esters of phosphoric acids, e.g. B, triphenyl phosphate, Tricresyl phosphate, diphenyl mono-p-tert-butylphenyl phosphate, alkylamides, acetanilide and N-methyl-p-methylacetanilide.

The solution of the auxiliary developing agent may be a polymer for prevention contain the crystallization of the dissolved auxiliary developing agent. A vinyl polymer latex is preferably used as such a polymer.

Specific examples of polymers in vinyl polymer latex are polyvinyl acetate, Polystyrene, polymethyl methacrylate, polymethyl acrylate, polybutyl acrylate, polymethacrylate, Polybutadiene, polyisoprene, polyethylene, polyethyl acrylate, polybutyl methacrylate, Glycidyl methacrylate-butyl methacrylate copolymers, styrene-butadiene copolymers, styrene-p-methoxystyrene copolymers, Styrene-vinyl acetate copolymers, vinyl acetate-vinyl chloride copolymers, vinyl acetate-diethyl maleate copolymers, Methyl methacrylate-acrylonitrile copolymers, methyl methacrylate-butadiene copolymers, Methyl methacrylate-vinyl acetate copolymers, methyl methacrylate-vinylidene chloride copolymers, Methyl acrylate-acrylonitrile copolymers, methyl acrylate-butadiene copolymers, methyl acrylate-styrene copolymers, Methyl acrylate-vinyl acetate copolymers, methyl acrylate-vinylidene chloride copolymers, Butyl acrylate-butadiene copolymers, butyl acrylate-styrene copolymers, ethylene-vinyl acetate copolymers, Ethylene-> 70 pionic acid copolymers, ethylene-propylene copolymers, vinyl chloride-acrylonitrile copolymers, Styrene-acrylic acid copolymers, styrene-ethyl acrylate copolymers, styrene-acrylamide copolymers, tert-butyl acrylate-ethyl methacrylate copolymers, methyl acrylate-methyl methacrylate copolymers, Methyl acrylate-acrylic acid copolymers, ethyl acrylate -Acrylic acid copolymers, n-butyl acrylate-acrylic acid copolymers, 2-ethylcyclohexyl acrylate-acrylic acid copolymers, Ethyl methacrylate-acrylic acid copolymers and methyl acrylate-ethyl acrylate-methacrylic acid interpolymers.

Furthermore, the solution of the auxiliary developing agent in the alkaliphilic hydrophobic solvents contain an antioxidant and a hardening agent.

The solution can also contain a color developer.

In particular, the addition of an antioxidant is effective for Prevention of damage to the polyhydroxybenzene as an auxiliary developing agent according to the invention.

That. Auxiliary developing agents used according to the invention can be used together with a benzoloid type developing agent, e.g. B. 1-phenyl-3-pyrolidone, 2,5-bis-ethyleneiminohydro quinone, vinyl hydroquinone, benzylaminophenol and the like exist as in Japanese Patent publication 17383/1962 indicated, whereby the air oxidation of the polyhydroxybenzene derivatives can be reduced according to the invention.

The amount of auxiliary developing agent used according to the invention depends on the amount and type of color developer, amount and type of silver halide, the layer structure of the photosensitive member and other factors but usually about 5 x 10 1 to 5 x 10 5 mol / m 2, preferably 5 x 10 2 to 5 x 10-4 mol / m² although the amount of the auxiliary developing agent is not limited to the above Values is limited and can vary considerably.

The auxiliary developing agents used according to the invention can be prepared by processes known per se, such as, for. Am JACS 73, p. 2227 (1951).

The auxiliary developing agents according to the invention can also so-called non-coating type photographic film units for diffusion transfer process can be applied with the image receiving layer between a transparent support and a light-reflecting layer which is permeable to the liquid treatment mass is attached, that in the image receiving layer in the development treatment formed dye image is observed through the transparent support. In this Case, the photosensitive element is not from the image receiving element after Transfer of the image disconnected. Examples of such photographic units are in U.S. Patents 2,983,606, 3,415,644, 3,415,645, 3,415,646, 3,594 164 and 3,594,165.

In a form of a film unit of the non-layering type is a silver halide emulsion with an associated color image forming agent Material is mounted on an opaque support and the photosensitive material is exposed imagewise from the side opposite to the carrier side. After exposure becomes a liquid treating composition as a layer between the surface of the silver halide emulsion layer and the image receiving layer formed on the transparent support spread. The liquid treatment mass contains a light-reflecting material, so that that on the image receiving layer through the layer of the liquid treatment composition Color image formed by diffusion is observed through the transparent support will. To get a true picture, with right and left not reversed, must have a specific optical system, for example a reflection system under Application of a mirror in the camera can be applied.

Furthermore, in another photographic film unit, dated Non-coating type a silver halide emulsion layer with an attached thereto the color image-forming material mounted on the transparent support and that light-sensitive material is exposed imagewise through the transparent support. After exposure, a liquid treatment mass is used as a layer between the Surface of the silver halide emulsion layer and the surface of one on the image-receiving layer formed on a transparent support. That in the Image receiving layer through the layer of the liquid treatment mass by diffusion formed fixed dye image is through the transparent support with a Background from a layer of a light reflective material observed that in the layer between the surface of the silver halide emulsion layer and the Surface of the image receiving layer formed on the transparent support previously or the layer of a light reflective, between the two light-reflecting surfaces carried by the liquid treatment mass Materials.

Another non-layering type photographic film unit is a photographic material which has a support with an thereon Image receiving layer, a light reflecting layer, a light interrupting layer with a light absorbing material and a silver halide emulsion layer comprises associated therewith the color image forming material; picture by picture of the Side exposed opposite to the carrier side. Then a liquid treatment mass spread over the surface of the silver halide emulsion layer Image receiving layer fixed the image and this through the light interruption layer and the light reflective Layer transferred during diffusion Image is observed through the transparent support. A film unit in which the Surface of the silver halide emulsion layer through a transparent cover sheet is covered and which is constructed so that the film unit is covered by the cover sheet is exposed and then a liquid treatment composition, which is a light-absorbing Contains material between the cover sheet and the surface of the silver halide layer is particularly useful, and the present invention can also applied to such a non-layering type photographic film unit will.

The photosensitive member used in the present invention has a dilberhalide malsion layer with an associated one that forms the color image Material. The combination of the color sensitivity of the silver halide emulsion and the spectral absorption of the color image is appropriately dependent chosen by the desired color rendering. To reproduce the natural color using the subtractive color process becomes a photosensitive element with at least two combinations each of a silver halide emulsion with one selective spectral sensitivity in a certain wavelength range and one for providing a color image with selective spectral sensitivity capable connection in the same wavelength range is used. A particularly useful one light-sensitive element has a combination of a blue-sensitive silver halide emulsion and a compound capable of forming a yellow dye image, a combination a green-sensitive silver halide emulsion and one for forming one Magenta dye image capable compound and a combination one, he red-sensitive Silver halide emulsion layer and one for forming a cyan dye image capable connection. The combination of the silver halide emulsion and the color image forming material is in the photosensitive element as a face-face-face relationship adjoining each other or as a layer containing particles from both components, available. In a preferred multilayer structure, sequentially one blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive emulsion layer on a support from the exposure side formed and especially when the photosensitive element is highly sensitive silver halide emulsion layers, which contain iodide, can have a yellow filter layer between the blue-sensitive Silver halide emulsion layer and the green-sensitive silver halide emulsion layer be formed. The yellow filter layer contains a yellow colloidal silver dispersion, a dispersion of an oil-soluble yellow dye, one on a basic polymer pickled dye or a basic dye pickled to an acidic polymer.

The silver halide emulsion layers are advantageously one another separated by an intermediate layer, the intermediate layer helps prevent the occurrence of undesirable interaction between the emulsion layer units of different color sensitivity. The interim slide can consist of one hydrophilic polymers such as gelatin, polyacrylamide, partially hydrolyzed polyvinyl acetate, formed from a latex of a hydrophilic polymer and a hydrophobic polymer porous polymers according to US Pat. No. 3,625,685 or a polymer, its hydrophilic properties gradually through the liquid treatment mass, such as calcium alginate, is increased as described in US Pat. No. 3,384,483, exist.

The silver halide emulsion used in the present invention is a colloidal dispersion of silver chloride, silver bromide, silver chlorobromide, silver iodobromide, Silver chloroiodobromide or mixtures of such silver halides.

The halide composition of the silver halide emulsion will vary depending on the end use of the photographic material and those to be used Treatment conditions are selected, but a silver iodobromide or a silver chloroiodobromide is used with a content of about 1 to 10 mol% iodide, less than about 30 mol% chloride, Remainder bromide, particularly preferred. The silver halide grains with a middle Particle sizes from about 0.1 microns to about 2 microns are useful and dependent of the purpose of the photographic material are silver halide grains having a uniform grain size favorable. The silver halide grains can be in the shape of the cubic System, the octahedral system or a mixed crystal system are present.

These silver halide emulsions can be prepared using conventional methods are produced as they are, for. B. in P. Glafkides, Chimie Photographique, 2nd edition, Chapters 18 to 23, Paul Montel, Paris (1957) are given. That is, a silver salt, such as silver nitrate, is used to react with a halide in the presence of a solution brought a protective colloid and the crystal growth of the silver halide formed is used in the presence of excess silver halide or a silver halide solvent, like ammonia. In this case, a single nozzle process, a twin nozzle process can be used or a pAg control twin nozzle methods can be used.

The removal of the soluble salts from the resulting silver halide emulsion can be obtained by coagulating the silver halide emulsion by cooling with the following Water washing, by dialysis, addition of a precipitant such as an anionic one Polymers or an anionic surfactant with sulfonic groups, sulfuric acid ester groups, Carboxyl groups and subsequent adjustment of the pH value or by addition an acylated protein such as phthaloyl gelatin as a protective colloid with subsequent pH adjustment can be achieved.

It is favorable that the silver halide emulsions used according to the invention chemically by heat treating the emulsion using that in gelatin contained natural sensitizers, sulfur sensitizers, such as sodium thiosulfate and N, N, N'-triethylurea, a gold sensitizer such as a thiocyanate complex salt of monovalent gold or a thiosulfate complex of monovalent gold or reductive Sensitizers such as tin (II) chloride and hexamethylenetetramine are sensitized. According to the invention, silver halide emulsions, the latent images on the Surface of the silver halide grains, or silver halide emulsions which form latent images inside the silver halide grains, as in U.S. Patents 2,592,550 and 3,206-313 may be used.

The silver halide emulsions used according to the invention can with additives such as 4-hydroxy-6-methyl-1,3-3a, 7-tetraazaindene, 5-nitroimidazole, 1-phenyl-5-mercaptotetrazole, 8-chloro-mercury quinoline, benzenesulfinic acid, pyrocatechol, 4-methyl-3-sulfoethylthiazolidine-2-thione, 4-Phenyl-3-sulfoäthylthiazolidin-2-thione and the like. Stabilized will. Inorganic compounds such as cadmium salts and mercury salts can also be used or complex salts of platinum group elements such as chlorine complex salts of palladium can be used advantageously to stabilize the silver halide emulsions.

The silver halide emulsions used according to the invention can also be used a sensitizing compound such as a polyethylene oxide compound contain.

The silver halide emulsions used according to the invention can an extended color sensitivity, if necessary using spectral possess sensitizing dyes. Examples of useful spectral sensitizers Dyes are cyanines, merocyanines, holopolar cyanines, styryls, hemicyanines, Oxanols, hemioxanols and the like. Specific examples of spectral sensitizers are in P. Glafkides, Chimie Photographique, 2nd editions, chapters 35 to 41 and F. M. Hamer, The Cyanine Dyes and Related Compounds, Interscience.

In particular, with an aliphatic group with a hydroxyl group, a carboxyl group or a sulfo group on the nitrogen atom substituted cyanines corresponding to U.S. Patents 2,503,776, 3,459,553 and 3,177,210 in particular useful in practicing the invention.

The layers through which the liquid treatment mass diffuses, for example Silver halide emulsion layers containing material for color image formation Contain layers, intermediate layers and protective layers according to the invention a hydrophilic polymer as a binder. Examples of such hydrophilic polymers are gelatine, casein, gelatine modified with an acylating agent and the like, grafted with a vinyl monomer Gelatin, proteins such as albumin, Cellulose derivatives such as hydroxyethyl cellulose, methyl cellulose and carboxymethyl cellulose, Polyvinyl alcohol, partially hydrolyzed polyvinyl acetate, non-electrolytes of high molecular weight such as polyvinylpyrrolidone and polyacrylamide, anionic synthetic Polymers such as polyacrylic acid, partially hydrolyzed polyacrylamides and copolymers of vinyl methyl ether and maleic acid and ampholytic synthetic polymers such as -N-vinylimidazole, Copolymers of acrylic acid and acrylamide, and polyacrylamide, which is a Hofmann reaction was subjected. These hydrophilic polymers can be used singly or as a mixture will. Furthermore, the hydrophilic polymer layer can be a latex-like polymer dispersion a hydrophobic monomer, for example an alkyl acrylate or an alkyl methacrylate contain.

These polymers, especially the polymers with functional groups, how. Hydroxyl groups, amino groups, carboxyl groups, can be achieved by various crosslinking agents A loss of permeability is made insoluble for liquid treatment masses will. Examples of particularly useful crosslinking agents are aldehyde compounds, such as formaldehyde, glyoxal, glutaraldehyde, mucochloric acid and oligomers of acrolein; Aziridine compounds such as triethylenephosphoramide disclosed in Japanese Patent Publication 8790/1962, epoxy compounds such as 1,4-bis (2 ', 3'-epoxypropoxy) diethyl ether accordingly Japanese Patent Publication 7133/1959, active halogen compounds such as 2-Hydroxy-4,6-dichloro-s-triazine sodium salt according to US Pat. No. 3 325287, active olefin compounds such as hexahydro-1,3,5-triacryl-s-triazine, dialdehyde starch and 3-hydroxyl-5-chloro-s-triazinyl gelatin corresponding to US patent 3,362,827. These hydrophilic polymers, in addition to the crosslinking agent an accelerator for the crosslinking reaction, such as a carbonate or resorcinol, contain.

The color developer is usually in a solvent or dissolved in a mixed solvent with heating, the solution of the color developer then-added to the aqueous solution of the hydrophilic colloid such as gelatin, the mixture was passed through a colloid mill an appropriate number of passes and attached directly to a carrier or after solidification by cooling, Cutting and washing and re-melting raised. Alternatively, the dispersion of the dye developer is added to a silver halide emulsion before being drawn up. Examples of solvents used for this purpose are in Japanese Patent Publication 13,837/1968 and U.S. Patent No. 2,322,027.

The dye developers used in the present invention are dye developers those in U.S. Patents 2,983,605, 2,983,606, 2,992,106, 3,047,386, 3,076,808, 3,076,820, 3 077 402, 3 126 280, 3 131 061, 3 134 762, 3 134 765, 3 135 604, 3 135 605, 3 135 606, 3 135 734, 3 141 772 3 142 565, 3 218 164, 3 230 082, 3 230 083, 3 239 339, 3 320 063, 3 453 107, 3 579 334, 3 482 972 and 3 563 739, the Australian Patent 220 279, German Patent 1,036,640, British Patent Specifications 804 971, 804 973, 804 974 and 804 975, Belgian patents 554 935 and 568 344, Canadian patents 579 038 and 577 021, French Patent specification 1,168,292 and the like. Are described.

The dye developers are characterized as having Easily soluble in water and nondiffusible under acidic and neutral Conditions and are diffusible under alkaline conditions.

Typical examples of the dye developers include the following Links.

1-phenyl-3-Nn-hexylcarbamoyl-4-p- (2-hydroquinonylethyl) -phenylazo-5-pyrazolone 2-p- (2-hydroquinonylethyl) -phenylazo-4-isopropoxy-1-naphthol 1,4-bis- [β- (hydroquinonyl-isopropyl) -amino] -5,8-dihydroxy-anthraquinone 1-phenyl-3-n-butylcarbamoyl-4- [p- (2 ', 5-dihydroxyphenethyl) -phenylazo] -5-phyrazolone 1 -Phenyl-3-Nn-herylcarbamoyl-4-iip- (2 ', 5'-dihydroxyphenethyl) -phenylazo] -5-pyrazolone 1-phenyl-3-carbethoxy-4-p- (2', 5'-dihydroxyphenethyl) -phenylazo] -5-pyrazolone 2-fp- (2 ', 5'-dihydroxyphenethyl) -phenylazg7-4-iospropoxy-1-naphthol 1-phenyl-3-N-cyclohexylcarbamoyl-4- ffi - (2', 5 ' -dihydroxyphenäthyl) -phenylazo] -5-pyrazolone 1-phenyl-3-phenyl-4- [p- (2 ', 5-dihydroxyphenethyl) -phenylazo] -5-pyrazolone 1-phenyl-3-amido-4-l4' -p- (2 ", 5" -dihydroxyphenethyl) -phyenlazo] -2 ', 5-diethoxyphenylazo # -5-pyrazolone 1-phenyl-3-N-cyclohexylcarbamoyl-4- [p- (2,', 5'- dihydroxyphenethyl) phenylazo] -5-phyrazolone 1-phenyl-3-phenyl-4- [p- (2 ', 5'-dihydroxyphenethyl) phenylazo] -5-pyrazolone 1-phenyl-3-methyl-4- [p -2 ', 5'-dihydroxyphenethyl) phen ylazo] -5-pyrazolone 1-phenyl-3- (Nn-heptyl) -carbamoyl-4- [ß-hydroquinonylethyl) -phenylazo] -5-pyrazolone 1- (2'-chlorophenyl) -3- (Nn-hexylcarbamoyl) -4- [p- (β-hydroquinonylethyl) phenylazo] -5-pyrazolone 1- (2'-methylphenyl) -3- (Nn-hexylcarbamoyl) -4- [p- (ß-hydroquinonylethyl) -phenylazo] -5-pyrazolone 1-acetoxy-2- [p- (ßhydroquinonylethyl) -phenylazo] - 4-methoxynaphthalene 4-isobutoxy-2- [p- (ß-hydroquinonylethyl) -phenylazo] -1-naphthol 2- {4 '- [p-2 ", 5" -dihydroxyphenethyl) -phenylazo] -α-naphtylazo} - 4-methoxy-1-naphthol 2- {4 '- [p- (2 ", 5" -dihydroxyphenethyl) -phenylazo] -α-naphthylazo} -4-methoxy-1-naphthol 4- [p- (2', 5'-Dihydroxyphenyl) -phenylazo] -5-acetamido-1-naphthol 4- [p- (2 ', 5-dihydroxyphenethyl) -phenylazo] -5-benzamido-1-naphthol 2- [p-2', 5 '-Dihydroxy-4'-methylphenethyl) -phenylazo] -4-propoxy-1-naphthol 2- [p- (2 ', 5'-dihydroxyphenethyl)] phenylazo] -4-acetamido-1-naphthol 2- [p- (2 ', 5'-Dihydroxyphenäthy) -phenylazo] -4-methoxy-1-naphthol 2- [p- (2', 5'-Dihydroxyphenäthyl) -phenylazo] -4-ethoxy-1-naphthol 2- [p- (2 ', 5'-Dihydroxyphenethyl) -phenylazo] -4-n-propyl-1-naphthol 2 - [p- (2 ', 5'-dihydroxyphenethyl) -phenylazo] -4- [1 ", 4" -dioxahexyl-1-naphthol 1,4-bis- [ß- (2', 5-dinydroxyphenyl) ethylamino] anthraquinone 1-chloro-4- [β- (2 '-, 5'-dihydroxyphenyl) ethylamino] anthraquinone N-monobenzoly-1, -4-bis-β- (3', 4'-dihydroxyphenyl ) -äthylamino] -anthraquinone N-monobenzoyl-1,4-bis- [ß- (2 ', 5'-dihydroxyphenyl) -ethylamino] -anthraquinone 5.8-dihydroxy-1,4-bis [ß-hydroquinonyl-alpha; methyl) ethylamino] anthraquinone 1,4-bis (2 ', 5'-dihydroxyaniline) anthraquinone 1,5-bis (2', 5'-dihydroxyaniline) -4,8-dihydroxyanthraquinone 1,4- Bis - [(ß-hydroquinonyl-α-ethyl) -äthylamino] -anthraquinone 5-hydroxy-1,4-bis - [(ß-hydroquinonyl-α-methyl) -äthylamino] -anthraquinone 1-ß-hydroxy-α- ethylethylamino) -4- (ß-hydroquinonyl-α-methylethylamino) anthraquinone 1- (butanol-2'-amino) -5,8-dihydroxy-4-hydroquinonylisopropylaminoanthraquinone 1,4-bis-β- (2 ', 5'-dihydroxyphenyl) -isopropylamino anthraquinone 1-acetoxy-2- {p- [ß- (hydroquinonyl) -ethyl] -phenylazo} -4-methoxynaophthalene, 1-acetoxy-2- {p- [ß- (hydroquinonyl) -ethyl] -phenylazo} -4- [(2'-ethoxy) ethoxy] naphthalene 1-acetoxy-2- {p- [β- (hydroquinonyl) ethyl] phenylazo} -4-isporopoxynaphthalene 1-acetoxy-2- {p- [ß-hydroquinonyl) -ethyl] -phenylazo} -4- @ 1 ', 4'-dioxapentyl) naphthalene 4- [p-2-hydroquinonylethyl) -phenylazo] -ß- ( 2 ', - furyl) -ß-oceto @ yacrylonitrile α- [p- (2-hydroquinonylethyl) -phenylazo] -ß- (2'-benzofuranyl) -ß-acetoxyacryinitrile α- [m- (2-hydroquinonylethyl) -phenylazo ] -ß- (2'-benzofuranyl) -ß-acetoxyacrylonitrile α- [m-hydroquinonylmethyl) -phenylazo] -ß- (2'-benzofuranyl) -ß-acetoxyacrylonitrile α- [p-2-hydroquinonylethyl) -phenylazo] - ß- [2 '- (5'-bromfuryl)] - ß-acetoxyacrylonitrile α- [p- (2-hydroquinonylethyl) -phenylazo] -ß- (2'-5'-methoxybenzofuranyl)] - ß-acetoxyacrylonitrile α- [ p- (2-Hydroquinonylethyl) -phenylazo] -ß- [2 '- (5'-bromobenzofuranyl)] - ß-acetoxyacrylonitrile α- [p- (2-hydroquinonylethyl) -phenylazo] -ß- [2' - (3 '-methylbenzofuranyl)] - ß-acetoxyacrylonitrile α-phenylazo-ß- [2- (5'-hydroquinonylacetamidobenzofuranyl)] - ß-acetoxyacrylonitrile α- [p- (2-hydroquinonylethyl) -phenylazo] -ß- (2'-benzofuranyl ) -β-methoxyacetoxyacrylonitrile α - [(2-methyl-5-hydroquinonylethyl) -phenylazo] -ß- (2'-benzofuranyl) -ß-acetoxyacrylonitrile α - [(2-acetoxy-5-hydroquinonylmethyl) -phenylazo] -ß- (2'- funyl) -ß-acetoxyacrylonitrile α - {[2-acetoxy-5 '- (2'-hydroquinonylethyl)] - phenylazo} -ß- (2'-benzofuranyl) -ß-acetoxyacrylonitrile α - [(2-acetoxy-5- hydroquinonylmethyl) -phenylazo] -ß- [2 '- (5'-bromfuryl)] - ß-acetoxyacrylonitrile α - [(2-acetoxy-5-hydroquinonylmethyl) -phenylazo] -ß- [2', (5'- methoxybenzofuranyl)] - ß-acetoxyacrylonitrile α - [(2-acetoxy-5-hydroquinonylmethyl) -phenylazo] -ß- [2 ', (5'-bromobenzofuranyl)] - ß-acetoxyacrylonitrile α - [(2-acetoxy-5- hydroquinonylmethyl) -phenylazo] -β- [2 ', (5'-mcthyloenzofuranyl)] - β-acetoxyacrylonitrile α- (2-acetoxyphenylazo) β- [2' - (5-hydrochinoylacetamidobenzofuranyl)] - β-acetoxyacrylonitrile α - [(2-Acetoxy-5-hydrochinoylmethyl) -phenylazo] -ß- (2'-benzofuranyl) -ß-acetoxyacrylonitrile 2- [m- (hydroquinonylmethyl) -phenylazo] -3-butyroyloxy-5-methylbenzothiophene 2- [ (2'-chloro-5-hydrochinoylmethyl) -phenylazo] -3-acetoxybenzothiophene 2- [p- (2'-hydroquinonylethyl) -phenylazo] -3-acetoxybenzothiophene 2- [p- (2'-hydroquinonylethyl) -phenylazo] - 3-acetoxy-5-chlorobenzothiophene 2 - [(2'-acetoxy-5'-hydroquinonylmethyl) -phenylazo)] - 3-acetoxybenzothiophene 2 - [(2'-methyl-5'-hydroquinonylmethyl) -phenylazo] -3-acetoxybenzothiophene 2- [m- (Hydroquinonylmethyl) phenylazo] -3-acetoxybenzethiophene 1,4-bis- (2 ', 5'-dihydroxyaniline) -9,10-dihydroxyanthreicene 1,5-bis- (2', 5'-dihydroxyaniline ) -4,8,9,10-tetrahydroxyanthracene, 1,4-bis- [ß- (2 ', 5-dihydroxyphenyl) isopropylamino] -9,10-dihydroxyanthracene 1,4-bis- [ß- (2' , 5'-dihydroxyphenyl) ethylamino] -9,10-dihydroxyanthracene 1-chloro-4- [ß- (2 ', 5'-dihydroxyphenyl) ethylamino] -9,10-dihydroxyanthracene 1,4-bis - [# - (2 ', 5'-dihydroxyphenyl) propylamino-5,8-9,10-tetrahydroxyanthracene 1 - [# - (2', 5'-dihydroxyphenyl) propylamino] -4- (β-hydroxyethylamino) -5.8, 9,10-tetrahydroxyanthracene 1 - [(ß-Hydroquinonyl-α-methyl) ethylamino] -4- (ßhydroxyäthylamino) -5,8,9,10-tetrahydroxyanthracene 1- [ß- (2 ', 5'-dihydroxyphenyl) -äthylamino] -5- (ßhydroxyäthalamino) -4,8,9,10-teorahydroxyanthracene 1,5-bis - [(ß-hydrochinoyl-α-methyl) -äthylamino] -4,8,9,10-tetrahydroxyanthracene 1- [ß-2 ', 5'-Dihydroxyphenyl) -äthylamino] -4-hexylamino-5,8,9,10-tetrahydroxyanthracene 1,4-bis - [(ß-Hydrochinoyl-α-ethyl) -äthylamino] -5, 8,9,10-tetrahydroxyanthra cen 1,4-bis - [(ß-hydroquinonyl-α-methyl) -äthylamino] -5,8,9,10-tetrahydrozyanthracen 1,4-bis - [(ß-hydroquinonyl-α-ethyl) -äthylamino] - 9,10-dihydroxyanthracene 1,4-bis - [(β-hydroquinonyl-α-methyl) ethylamino] -5,9,10-trihydroxyanthracene 1- (β-hydroxy-α-ethylethylamino) -4- (β-hydroquinonyl -α-methylethylamino) -9,10-dihydroxyanthracene 1- (butanol-2'-amino) -4- (β-hydroquinonylisopropylamino) 5,8,9,10-tetrahydroxyanthracene.

1,8-bis - [(ß-hydroquinonyl-α-methyl) ethylamino] -4,5, -9,10-tetrahydroxyanthracene N-monobenzoyl-1,4-bis [ß- (3 ', 4'- dihydroxyphenyl) ethylamino] -9,10-dihydroxyanthracene N-monobenzoyl-1,4-bis [ß- (2 ', 5-dihydroxyphenyl) ethylamino] -9,10-dihydroxyanthracene 1,4-diamino-2- [ E- (α-methyl-2 ', 5-dihydroxyhydrocinnamido) pentoxy) -9,10-dihydroxyanthracene 1,4-diamino-2 - # - (α-ethyl-2', 5'-dihydroxyhydrocinnamido) pentoxy] - 9,10-dihydroxyanthracene 1,4-diamino-2 - [# - (2 ', 5'-dihydnoxyhydrocinnamido) - 1,4-bis - [(# - hydroquinonyl-α-methyl) propylamino] -5,8,9,10-tetrahydroxyanthracene 1- (o-carboxyphenyl) -3-phenyl-4- [p- (2 ', 5'-ditrifluoroacetoxy-β-phenylethyl) -phenylazo] -5-hydroxypyrazole lactone 1- (o-Carboxyphenyl) -3-N-phenylcarbamoyl-4- [p- (β-hydroquinonylethyl) -phenylazo] -5-hydroxypyrazole lactone α {[2-butyroyloxy-5- (2 /, 5'-dibutyroyloxyphenylmethyl)] phenylazo } -β- (2 "-benzofuranyl) -β-butyroyloxyacrylonitrile 2- [m- (2 ', 5'-dibutyroyloxyphenylmethyl) -phenylazo] -3-butyroyloxybenzothiophene α- [p- (2,5-butyroyloxy-β-phenylethyl ) -phenylazo] -ß- (2'-benzofuranyl) -ß-butyroyloxyacetonitrile 2- [p- (2 ', 5'-Äthoxyoxaloxyphcnäthyl) -phenylazo] -4-methoxy-1-naphthol If an amino nitrogen atom of a cyan dye developer, for example 1,4-bis- [ß- (2', 5'-dihydrophenyl) - ethylamino7-anthraquinone is acylated, the color of the color developer changes to magenta and if both amino nitrogen atoms of the color developer are acylated, the color of the color developer changes to orange.

Likewise, by acylating the hydroxyl group of the color developer the color of the dye developer can be changed. So the structures and the colors of the color developers during the development reaction, for example Hydrolysis and by taking advantage of the phenomenon, that the color of the color developer is changed to another color when applied to an image receiving layer is transferred, different from the color of the color developer when it is in the photosensitive element is present, can be changed. Examples of such color developers are set forth in U.S. Patents 3,579,947, 3,307,947, and 3,336,287.

A leuco compound such as 1-phenyl-3-methyl-4- (2'-methyl-4'-diethylamino) -anilino-5-pyrazolone, which has no desensitizing effect on the silver halide emulsion layer of the layer containing this compound and the image-wise into the image-receiving material from the developed part or the immobilized undeveloped part to Oxidation diffuses to provide a colored image is also useful.

The color developer is usually in one with the silver halide connected in a silver halide emulsion layer in the photosensitive state Element present. This means that the color developer is in one or more emulsion layers preferably in a hydrophilic organic colloid layer adjacent to the silver halide emulsion layer present on the opposite side to the light exposure side. In particular in a multilayer photosensitive element for multicolor reproduction it is particularly effective that each color developer is in a layer adjacent to the Silver halide emulsion layer for which the main sensitive wavelength range is in a complementary color to the color of the color developer, opposite on the side on the side of the light exposure is present. However, as already discussed above, if a color developer which has no complementary color but the desired one Complementary color in the image receiving layer as a result of the development treatment provides, is used, the color developer in the silver halide emulsion layer, which is associated with the color developer, or in a layer adjacent to the Silver halide emulsion layer are present. Furthermore, in a further embodiment the combination of a color developer and a silver halide emulsion of the color developer in a colloid containing the particles including the silver halide grains in Surrounds the form of a mixed package.

The photographic layers used according to the invention can for example by an immersion coating process, a roller coating process, an air spreading process, a bead drawing process according to the US patent 2,681,294 or a curtain coating process according to U.S. Patent 3 508 947 can be trained. Especially in the case of the production of multilayer For light-sensitive elements, it is advantageous to have a plurality of layers at the same time using a funnel with multiple slots according to the US patents 2,761,417, 2,761,418 and 2,761,419, and 2,761,791.

To facilitate the mounting of the photographic according to the invention used layers, it is convenient to use various surfactants in incorporate the coating compounds as a coating aid. Examples of useful Coating auxiliaries are non-ionic surface-active agents such as saponin, ethoxyethylene adducts of p-nonylphenol, alkyl ethers of sucrose and glycerol monoalkyl ethers, anionic surfactants such as sodium dodecyl sulfate, sodium p-dodecyl benzene sulfonate and sodium dioctyl sulfosuccinate, a carboxymethyl lauryl ammonium hydroxide internal salt with the designation "Deriphat 151" of General Mills and betaine compounds accordingly the U.S. Patent 3,441,413, British Patent 1,159,825 and Japanese Patent Publication 21985/1971.

Furthermore, to facilitate the mounting of the photographic layers used according to the invention, the coating compositions contain various viscosity-increasing agents exhibit. For example, a high molecular weight polyacrylamide which the viscosity of the coating compound increases due to its own viscosity, cellulose sulfate ester, Poly-p-sulfostyrene potassium salts and anionic polymers such as acrylic acid polymers, which has a viscosity increasing effect due to the interaction with that in the Binder polymers present in the coating composition show, as in US Pat. No. 3 655 407 specified, can be used.

The carrier material used according to the invention is under treatment essentially planar and dimensionally stable with a treatment solution. In general flexible supports are useful; however, rigid supports, e.g. glass, be used depending on the intended use. Suitable pliable Supports that can be used for the photosensitive material include Supports such as cellulose nitrate film, cellulose acetate film, polyvinyl acetate film, polystyrene film, Polyethylene terephthalate film and polycarbonate film. Carriers that are dimensionally stable and are impermeable to oxygen, such as a laminate made of an intermediate a polyethylene terephthalate film or a cellulose acetate film in a sandwich-like manner arranged polyvinyl alcohol, are particularly desirable because of the stapility of the film image increased and the occurrence of stains is reduced. The moisture-permeable Carrier, as described in U.S. Patent 3,573,344 is described in terms of de £ accelerating the evaporation of water that from the treatment mass emerges, usable through the carrier. Desirably the one that is transparent Carrier colored to such a degree (without preventing exposure to image observation), which prevents the passage of light parallel to the carrier plane in order to expose the Silver halide layer when treating a film unit in ambient light, i.

outside of a camera, to prevent. The carrier can, if desired a plasticizer such as phosphate ester, phthalate ester and an ultraviolet absorbent, e.g. 2- (2-hydroxy-4-t-butylphenyl) benzotriazole and an antioxidant e.g. a hindered phenol. To improve the adhesion between the carrier and the hydrophilic polymer layer can be an adhesive layer on the support and / or a pretreatment of the carrier by corona discharge, ultraviolet radiation, Flame treatment or the like, are used.

In general, the support has a thickness of 20 to 300 units suitable coating amount of the silver halide emulsion on the support preferably about 0.5 to 10 g (as silver) / m² of the support.

The image recording element used according to the invention fixes the materials forming the color image, such as the diffusible dyes which are present in imagewise distribution of the materials providing the color image with the silver halide emulsions are united, are set free. If the color image-providing material is a color developer containing a hydroquinonyl group or an anionic material such as a coloring dye containing an acidic water-solubilizing group, it is advantageous if the image recording element is a basic polymer or a contains basic surfactant. Excellent examples of basic Polymers are basic compounds with a tertiary or quaternary nitrogen atom. Specific examples of such polymers are poly-4-vinylpyridine, polymers one Aminoguanidine derivatives of vinyl methyl ketone according to US Pat. No. 2 882 156, poly-4-vinyl-N-benzylpyridinium -p-toluenesulfonate, poly-3-vinyl-4-methyl-N-n-butylpyridinium bromide, Copolymers of styrene and N- (3-maleimidopropyl) -N, N-dimethyl-N (4-phenylbenzyl) ammonium chloride corresponding to US Pat. No. 1,261,925 and poly-N- (2-methacroylethyl-N, N-dimethyl-N-benzyl) ammonium chloride]. As the above-mentioned basic surface active agents, surface active agents are Agents with an onium residue, for example an ammonium, sulfonium or phosphonium group, together with a hydrophobic radical, for example a long-chain alkyl group, excellent.

Specific examples of such basic surfactants are N-laurylpyridinium bromide, cetyl-tri-n-laurylammonium-p-toluenesulfonate, methylethylcetylsulfonium iodide, and benzene triphenylphosphonium chloride. Besides having these basic compounds also compounds of a polyvalent metal, such as thorium, aluminum or zirconium, also a fixing effect for materials which have an anionic dye image deliver. Advantageously, these materials are used to form a film or .a layer together with a polymer such as gelatin, especially acid-treated Gelatine, polyvinyl alcohol, hydroxyethyl cellulose, polyacrylamide, polyvinyl methyl ether, N-methoxymethylpolyhexylmethylene adipamide, polyvinylpyrrolidone used. If that the dye image-forming material has a component for forming a dye, for example a diffusible coupler, the image receiving layer contains the further coupling component for the formation of the dye in the reaction with the dye component, for example a p-phenylenediamine derivative and an oxidizing agent or a diazonium compound. Image pickup elements of this type are described in U.S. patents 2647 049, 2 661 293, 2 698 244, 2 698 798, 2 802 735 and 3 676 124 and the British Patents 1,158,440 and 1,157,507 specified. The appropriate one The thickness of the image receiving layer is approximately 1 to 50 microns.

The image recording element used according to the invention advantageously has the function of neutralizing that carried by the liquid treatment mass Alkalis.

The liquid treatment mass contains an alkaline compound for Increase the pH of the same to a sufficiently high value, for example higher than about 10, or preferably higher than 11 for speed acceleration the image formation which the development of the silver halide emulsion layers, the formation and diffusion of the diffusible dyes from the image-forming ones Includes materials. Practically after completion of the training of the transferred images by diffusion, the pH in the film unit becomes one pH lower than about 9, preferably lower than 8, neutralized, thereby preventing progression the image formation is practically canceled in order to change the hue of the formed image over time caused by high alkalinity To prevent discoloration of the image and stains in the background parts of the photograph. For this purpose it is advantageous to have a neutralization layer that is an acidic Material in sufficient to neutralize the alkali in the treatment mass Amount to the above-described pH contains to form, d. H. the sour Material will have an areal density more than equivalent to the alkali in the liquid Treatment mass spread out in the film unit. Preferred acidic materials are Materials containing a carboxyl group or a sulfonic group or furthermore one Precursor capable of supplying these groups upon hydrolysis contain.

Examples of preferred acidic materials are the higher ones Fatty acids, such as oleic acid according to US Pat. No. 2,983,606 and polymers of acrylic acid, Methacrylic acid or maleic acid or partial esters or acidic anhydrides of those in the US patent 3,362,819 specified polymers.

Specific examples of acidic high molecular weight materials are copolymers of vinyl monomers such as ethylene, vinyl acetate, vinyl methyl ether and like. with maleic anhydride, the n-butyl half ester of maleic anhydride copolymer, Copolymers of butyl acrylate and acidic cellulose acetate phthalate. A suitable amount The acidic material ranges from about 0.7 to 1 equivalent to the amount of the alkali distributed in the liquid treatment mass, preferably more than an equivalent amount to the remaining alkali.

The neutralization layer can be in addition to the acidic material a polymer such as cellulose nitrate and polyvinyl acetate. Furthermore can the neutralization layer through crosslinking with a multifunctional aziridine compound and an epoxy compound. The neutralization layer can be in the Image pickup element and / or the photosensitive element are attached. It is particularly useful that the neutralization layer between the support and is attached to the image receiving layer of the image receiving element.

Furthermore, the acidic material can be encapsulated in the film unit be incorporated as microcapsules in accordance with German OLS 2,038,254.

It is also advantageous if the neutralization layer or the the layer containing the acidic material from the spreading layer of the liquid Treatment mass through a layer to control the degree of neutralization or a timing layer is separated. This timing layer helps prevent the undesirable decrease in the density of the transferred image due to too rapid Reduction of the pH value of the liquid treatment mass through the neutralization layer at, before the development of the silver halide emulsion layers and the formation of the diffusion transfer image is performed and delayed also reducing the pH until development and transmission in the desired dimensions are carried out.

In a preferred embodiment of the invention, the image pickup element has such a multilayer structure in the order carrier, neutralization layer, Timing layer and pickling layer (image recording layer). The timing layer is primary from a polymer such as gelatin, polyvinyl alcohol, polyvinyl propyl ether, polyacrylamide, Hydroxypropylmethyl cellulose, isopropyl cellulose, partially saponified polyvinyl butyral, partially hydrolyzed polyvinyl acetate and copolymers of ß-hydroxyethyl methacrylate and ethyl acrylate. It is advantageous to crosslink these polymers to cure with an aldehyde compound such as formaldehyde or an N-methylol compound. The thickness of the timing layer is generally about 2 to 20 microns.

The liquid treatment composition used according to the invention is a liquid mass, which contains the necessary components for the development of the silver halide emulsion layers and for forming the diffusion transfer dye images. The solvent of the liquid mass is mainly water and the liquid If desired, the mass can be solvents such as methanol and water-miscible solvents Contain methyl cellosolve. The liquid treatment mass also contains a Sufficient alkali to provide the necessary pH for the development of the silver halide emulsion layers and to neutralize those during the development and color image formation stages to maintain the acid formed. Examples of those in the liquid Alkalis that can be used for treatment masses are lithium hydroxide, sodium hydroxide, potassium hydroxide, Calcium hydroxide dispersions, tetramethylammonium hydroxide, sodium carbonate, tri-sodium phosphate, Diethylamine and similar materials. The liquid treatment composition preferably contains an alkali hydroxide in such a concentration that a higher pH than about 12, preferably higher than 14, at room temperature (about 20 to 300 C). In a more preferred embodiment, the liquid treatment composition contains a hydrophilic polymer, for example high molecular weight polyvinyl alcohol, hydroxyethyl cellulose, Sodium carboxymethyl cellulose and the like. These polymers not only contribute to elevation the viscosity of the liquid treatment mass to a value higher than 1 poise, preferably about 100 to 1000 poises at room temperature for ease of uniformity Spread of the liquid treatment mass during the treatment, but form also a non-flowable film when the liquid treatment mass through the Diffusion of the aqueous solvent into the photosensitive element and the Imaging element focused during treatment is what the training a unified film unit after treatment. The polymer film can also to prevent discoloration of the dye image by limiting the contribute to further transfer of the coloring components to the image receiving layer, after the formation of the diffusion transfer color image is practically completed.

The liquid treatment composition preferably also contains a light absorbing material, such as carbon black, to prevent the silver halide emulsion layers of light-sensitive element veiled during the treatment by the ambient light and a desensitizer as disclosed in U.S. Patent 3,579,333. Furthermore, it is advantageous that the liquid treatment composition is used for the Material for color image delivery contains a specific treatment component.

If the material providing the color image is a color developer, become an onium type development accelerator such as N-benzyl-α-picolinium bromide, and an antifoggant such as benzotriazole as treatment components used.

Furthermore, the liquid treatment composition can be the auxiliary developing agent included according to the invention. When the auxiliary developing agent is in the liquid Treatment mass is present, the appropriate amount thereof is in the range of about 10 5 mol / l to 102 mol / l.

In the color diffusion transfer method according to the invention is used, it is desirable to develop in the presence of a diffusible Execute onium connection. Suitable onium compounds are quaternary ammonium compounds, quaternary phosphonium compounds and quaternary sulfonium compounds. Examples for special. useful onium compounds are 1-benzyl-2-picolinium bromide, 1- (3-bromopropyl) -2-picolinium-p-toluenesulfonic acid, 1-phenethyl-2-picolinium bromide, 2,4-dimethyl-1-phenethylpyridinium bromide, α-picoline-ß-naphtholymethyl bromide, N, N-diethylpiperidinium bromide, dodecyldimethylsulfonium-p-toluenesulfonate or the like. The onium compound is preferably incorporated into the alkaline treatment composition.

The preferred amount of the onium compound is in the range of 2-15 % By weight based on the weight of the total treatment mass. By executing the development in the presence of the onium compound will reduce the quality of the transferred Color image improved remarkably. Further examples of onium compounds are in U.S. Patent Nos. 3,411,904 and 3,173,786 along with their application. Further the liquid treatment composition can contain a development inhibitor e.g. benzotriazole contain.

In the photographic material of the invention for the color diffusion transfer method The color developer does not cause aggregation after coating or coating. Therefore, the color developer is effectively prevented from leaking or seeping through and a clear color image can be obtained.

The invention is explained in more detail below with the aid of examples, wherein, unless otherwise specified, all parts, percentages and proportions are based on weight.

Example 1 Photographic films A and B were made in the following Manner of Preparation: Film A: A multilayer photosensitive element was made by successive mounting of the following layers on a cellulose triacetate carrier prepared: (1) Layer with the content of the cyan dye developer in a mixture from 25 ml of N, N-diethyllaurylamide and 25 ml of methylcyclohexanone, 15 g of 1,4-bis (α-methylβ-hydro quinonyl prop yl amino) - 5, 8-dihydroxyanthraquinone with heating to 700 ° C The solution was dissolved by emulsification in 160 ml of an aqueous gelatin solution with 10% by weight, which is 10 ml of an aqueous solution with 5% by weight of sodium ndodecylbenzenesulfonate contained, dispersed. After further Adding water to the dispersion to a total volume of 500 ml, the mixture on the carrier became a dry starch pulled up from 5 microns.

(2) Red-sensitive emulsion layer: A red-sensitive silver iodobromide emulsion (Content 1 mol% silver iodide) from 5.5 x 10-2 mol silver and 5.0 g gelatin per 100 g of emulsion was drawn up to a dry thickness of 5 microns.

(3) intermediate layer: 100 ml of an aqueous solution with 5% by weight of gelatin, which 1.5 ml of an aqueous solution with 5 wt.% Sodium n-dodecylbenzenesulfonate was drawn up to a dry thickness of 1.5 microns.

(4) Layer containing the magenta color developer in a mixture 20 ml of the magenta dye developer were obtained from 20 ml of N-n-butyl acetanilide and 25 ml of methylcyclohexanone 4-Propoxy-2- [p- (ß-hydroquinonylethyl) phenylazo] -1-naphthol dissolved with heating and the solution by emulsification in 120 ml of an aqueous gelatin solution containing 10 % By weight, which is 8 ml of an aqueous solution with 5% by weight of sodium n-dofdecylbenzenesulfonate contained, dispersed. After adding water to the dispersion to a total volume from 400 ml the mixture was drawn up to a dry thickness of 3.5 microns.

(5) Green-sensitive emulsion layer: A green-sensitive silver iodobromide emulsion (with a content of 2 mol% silver iodobromide) with 4.7 x 10-2 mol of silver and 6.2 g of gelatin on 100 g of the emulsion was drawn up to a dry strength of 1.8 microns.

(6) Interlayer: 100 ml of an aqueous gelatin solution containing 5 % By weight, which is 1.5 ml of an aqueous solution with 5% by weight of sodium n -dodecylbenzenesulfonate was applied to a top layer of 3 g gelatin / m2.

(7) Layer containing the yellow dye developer: in one Mixture of 10 ml of N-n-butyl acetanilide and 25 ml of cyclohexanone were 10 g of the yellow Dye developer, 1-phenyl-3-N-n-hexylcarboxyamido-4- [p- (2 ', 5'-dihydroxyphenethyl) phenylazo] -5-pyrazolone dissolved with heating. The solution was made by emulsifying in 100 ml of an aqueous Solution with 10% by weight gelatin, which contains 8 ml of an aqueous solution with 5% by weight sodium n-dodecylbenzolysulfonate contained, dispersed. This dispersion was mixed with 5 ml of an aqueous solution 2% by weight of 2-hydroxy-4,6-dichloro-s-triazine mixed and after further addition of water to a total volume of 300 ml, the mixture was given a dry strength of 1.5 Micron drawn.

(8) Blue-sensitive emulsion layer: A blue-sensitive silver iodobromide emulsion (with a content of 7 mol% silver iodide) with 3.5 x 10-2 mol of silver and 6.5 g of gelatin per 100 g of the emulsion was drawn up to a dry thickness of 1.5 microns.

(9) Protective layer: An aqueous solution containing 4% by weight of gelatin which 2 ml of an aqueous solution with 5% by weight of sodium n-dodecylbenzenesulfonate and 5 ml of an aqueous solution containing 2% by weight of mucochloric acid became a dry starch drawn from 1 micron.

Film B: The film B was made in the same way as the film, however, 30 g of the auxiliary developing agent according to the invention, namely 1,2,4-trihydroxy-5- (4'-butylphenyl) benzene was added to a mixture of 130 ml of isophorone and 1.5 g of 2,3-dihydroxynaphthalene dissolved in it were while taking the mixture in a flask Was stirred under a nitrogen atmosphere, whereupon 60 ml of the above alkaliphilic hydrophobic solvent (1) was gradually added to the solution, followed by the mixture by emulsification in 300 ml of an aqueous solution containing 10% by weight of gelatin was dispersed by means of a mixer and then the emulsion of the auxiliary developing agent to the coating compositions of the intermediate layer (3), the intermediate layer (6) and the protective layer (9) in amounts of 15 g, 25 g and 35 g for every 100 ml of each coating mass was added before the layers were drawn up.

Any of the photosensitive films thus prepared A and B were through an optical wedge with radiation from a white light source exposed and then superimposed using the following liquid treatment composition treated with the following image recording element: Treatment mass: water 100 ml Potassium hydroxide 11.2 g hydroxyethyl cellulose (highly viscous sodium, product of Hercules Corp.) 3.4 g benzotriazole 3.5 g N-benzyl-a-picolinium bromide 2.0 g zinc nitrate .0.5 g potassium thiosulfate 0.5 g lithium nitrate 0.5 g image pickup element The image pickup element was made in the following manner. 100 g of an aqueous solution with 10% by weight Gelatin, which 2 g of poly-4-vinylpyridine (mordant) and 0.1 g 1-phenyl-5-mercaptotetrazole were applied to a barite-coated paper pulled to a dry thickness of 10 microns.

During the treatment, the liquid treatment mass became a cover of 1.5 ml per 100 cm2 of the image pickup element and was spread after 1 minute the photosensitive element is laminated from the image pickup element.

That on the image pickup element in the case of application of the film B, containing the polyhydroxybenzene according to the invention, transferred color image had a lower minimum density and a higher maximum density than that at Application of the film A obtained image, which the polyhydroxybenzene according to the Invention not included.

The reflection densities of the highlight parts of the transferred color image were each using a red filter, a green filter and a blue filter measured.

The results obtained are shown in the following table: Table film filter minimum density blue 0.52 green 0.49 red 0.48 B blue 0.38 green 0.40 red 0.32 In terms of color, there was an improvement in the case of application of film B compared to the application of Film A observed. In the case of using the film B, the maximum density of the color image was still sufficiently high for trading purposes. The amount of developed in the film trained Silver was large in the case of using the film A compared with the case of using it of the auxiliary developing agent.

The invention has been described above on the basis of preferred embodiments without being limited to this.

Claims (13)

P a t e n t a n s p r ü c h e 1. A photographic material for a color diffusion transfer process, comprising a support having thereon at least two color image-forming units, each of these color image-forming units comprising a photosensitive silver halide emulsion layer and a photosensitive silver halide associated with a color image-forming material, at least one of layers formed on the support at least one compound of the general formula wherein R1, R2 and R3 represent an alkyl group, an alkoxy group, an aryl group, an aralkyl group, a halogen atom, a cyano group, a mercapto group, an arylthio group, an alkylthio group, a hydroxyl group or a hydrogen atom. 2. Photographic material according to claim 1, characterized in that that the compound of a polyhydroxybenzene derivative wherein R1, R2 and R5, respectively Are hydroxyl groups. 3. Photographic material according to claim 1 or 2, characterized in that that the compound of the general formula (I) is in at least one of the following Layers, namely those containing the color developer Layer, the silver halide emulsion layer, an intermediate layer or a protective layer is included. 4. Photographic material according to claim 1 to 3, characterized in that the compound corresponding to the general formula (I) in at least one of these layers as an emulsified dispersion in an alkaliphilic hydrophobic solvent corresponding to the general formula (II) wherein X is a hydrogen atom or a methyl group and R4 and R5 are an alkyl group, the total number of carbon atoms in the radicals R4 and R5 being in the range from about 7 to 11, is present. 5. Photographic material according to claim 1, characterized in that that in combination with the compound of general formula (I) in at least one of the layers further contains a benzoloid type developing agent. 6. Photographic material according to claim 1, characterized in that that the alkyl group represented by R1, R2 and R3 contains 1 to 18 carbon atoms, the alkoxy group represented by R1, R2 and R3 has the formula -OR, where R is Denotes an alkyl group having 1 to 8 carbon atoms represented by R1, R2 and R3 Aryl group is unsubstituted or is a substituted aryl group which is a or more of the groups of hydroxyl group, halogen atom, cyano, mercapto, nitro, Contains an alkyl group with 1 to 8 carbon atoms, alkoxy, aryl and aralkyl groups, the aralky group represented by R1, R2 and R3 is unsubstituted or a substituted aralkyl group which is one or more of the groups of hydroxyl group, Halogen atom, cyano, mercapto, nitro, alkyl group with 1 to 8 carbon atoms, Alkoxy group, aryl and aralkyl group on the aryl unit contains those indicated by R1, R2 and arylthio group represented by R3 is a phenylthio group or naphthylthio group and the alkylthio group represented by R1, R2 and R3 has the formula -SR, wherein R represents an alkyl group having 1 to 8 carbon atoms. 7. Photographic material according to claim 1, characterized in that that the compound of the general formula (I) from the group of 1,2,4-trihydroxy-5-phenylbenzene, 1,2,4-trihydroxy-5- (1 ', 1', 3 ', 3', - tetramethylbutyl) benzene, 1,2,4-trihydroxy-5- (4'-methylphenyl) benzoly, 12,4-trilhydroxy-5,6-dichlorobenzene, 1,2,4-trihydroxybenzene, 1,2,4-trihydroxy-5-5phenylthiobenzene, 1,2,4-trihydroxy-5,6-dimethylbenzene, 1,2,4-trihydroxy-5-benzylobenzene, 1,2,4-trihydroxy-5-cyclohexylbenzene, 1,2,4-trihydroxy-5- (4'-chlorophenyl) benzene, 1,2,4-trihydroxy-5- (3'-nitrophenyl) benzene and 1,2,4,5-tetrahydroxy-6-methylbenzene is selected. 8. Photographic material according to claim 4, characterized in that that the alkyl group represented by R4 and R5 contains 1 to 10 carbon atoms and is unsubstituted or terminated with a halogen atom, a carboxyl group, a sulfo group. or a phenyl group 9. A photographic film unit for the color diffusion transfer process, characterized in that it comprises a light-sensitive material which has on a support at least 2 silver halide emulsion layers, each silver halide emulsion layer containing an associated color developer, an image-receiving material for receiving dyes which are produced by the light-sensitive material during development of the photosensitive material, and an alkaline liquid processing composition for the development of the silver halide emulsion layers of the photosensitive material, wherein a transfer of the dyes is brought about from the photosensitive material to the image receiving material, wherein at least one of the layers of the photosensitive element or the processing composition comprises at least one compound of the general formula I below wherein R1, R2 and R3 each represent an alkyl group, an alkoxy group, aryl group, aralkyl group, a halogen atom, a cyano group, mercapto group, arylthio group, alkylthio group, hydroxyl group or a hydrogen atom. 10. A photographic film unit according to claim 9, characterized in that that the compound of the general formula (I) is a polyhydroxybenzene derivative, wherein the radicals R1, R2 and R3 each represent a hydroxyl group. 11. A photographic film unit according to claim 9, characterized in that that the compound of the general formula (I) is in at least one of the layers of color developer-containing layer, silver halide emulsion layer, intermediate layer and protective layer is included. 12. A photographic film unit according to claim 9, characterized in that that the alkyl group represented by the radicals R2 and 3 has 1 to 18 carbon atoms contains, the alkoxy group represented by the radicals R1, R2 and R3 has the formula -OR where R is an alkyl group having 1 to 8 carbon atoms, which is represented by R1, R2 and R3 represented aryl group is unsubstituted or a substituted one Is aryl group which is one or more of the groups of hydroxyl, Halogen-, Cyano, mercapto, nitro, alkyl group with 1 to 6 carbon atoms, alkoxy group, contains an aryl group and aralkyl group, the aralkyl group represented by R1, R2 and R3 is unsubstituted or is a substituted AraIky'lgruppe, the one or several of the groups of hydroxyl, halogen, cyano, mercapto, nitro, alkyl group having 1 to 8 carbon atoms, alkoxy, aryl and aralkyl groups on the aryl moiety contains, the arylthio group represented by R1, R2 and R3 is a phenylthio group, Is naphthylthio group and the alkylthio group represented by R1, R2, R3 is those of the formula -SR where R is an alkyl group having 1 to 8 carbon atoms means. 13. A photographic film unit according to claim 9, characterized in that that the compound represented by the general formula (I) from the group of 1,2,4-trihydroxy-5-phenylbenzene, 1,2,4-trihydroxy-5- (1 ', 1'3'3'-tertamethylbutyl) benzene, 1,2,4-trihydroxy-5- (4'-methylphenyl) benzene, 1,2,4-trihydroxy-5,6-dichlorobenzene, 1,2,4-trihydroxybenzene, 1,2,4-trihydroxy-5-phenylthiobenzene, 1,2,4-trihydroxy-5,6-dimethylbenzene, 1,2,4-trihydroxy-5-benzylbenzene, 1,2,4-trihydroxy-5-cyclohexylbenzene, 1,2,4-trihydroxy-5- (4'-chlorophenyl) benzene, 1,2,4-trihydroxy-5- (3'-nitrophenyl) -benzene and 1,2,4,5-tetraphydroxy-6-methylbenzene is chosen.