JP3228925B1 - Photographic processing composition and diffusion transfer photographic film unit - Google Patents

Abstract

The present invention relates to a photographic processing composition comprising an aqueous alkaline medium, the aqueous alkaline medium comprising titanium dioxide and a stabilizer, wherein the stabilizer is a polymer polymerized from repeating units of styrene and acrylic acid. including. The presence of the stabilizer substantially reduces sedimentation of the titanium dioxide particles in the treatment composition and maintains a substantially uniform distribution of the titanium dioxide particles therein. The processing compositions of the present invention are useful in photographic diffusion transfer film units and processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] This application is a continuation-in-part of the earlier co-pending application Ser. No. 08 / 997,217 filed Dec. 23, 1997.

The present invention relates to photographic diffusion transfer (diffusi).
Photographic processing compositions and film units for use in on-transfer systems
m unit). More specifically, the present invention relates to novel photographic processing compositions comprising an aqueous alkaline medium, titanium dioxide particles and a stabilizer for the titanium dioxide particles, and products utilizing the compositions.

BACKGROUND OF THE INVENTION As is well known in the art, dispersions of visible light reflectors, such as, for example, titanium dioxide, are generally employed in aqueous alkaline solutions, such as photographic processing compositions, and in colored lacquers and plastics. Added to a liquid organic medium such as a material.
It is known in the photographic art that titanium dioxide particles can be used to greatly reduce or eliminate unwanted effects such as fogging due to their high effective reflective properties. Similarly,
It is known in the coatings industry to use a dispersion of titanium dioxide to influence the properties of the product (hue, gloss, and physical and chemical behavior).

[0004] Importantly, the dispersed titanium dioxide particles must remain well dispersed to achieve the advantageous effects described above. That is, it must remain uniformly dispersed in the added aqueous alkaline solution or liquid organic medium.

US Pat. No. 3,642,510 describes a process for preparing titanium oxide pigments, which can be used in hydrophobic systems, such as paints or varnishes, in water or aluminum salts or aluminum salts. By adding an alkali metal salt of a high molecular weight carboxyl compound in an alcohol containing a zinc salt to a well-dispersed titanium oxide slurry, it can be dispersed to form an aluminum or zinc soap on the titanium oxide surface. is there.

[0006] US Pat. No. 4,235,768 discloses a method for producing a uniform dispersion of pigments in liquid organic media (eg, colored lacquers and plastics materials) by converting titanium dioxide pigments to organic polymers containing carboxyl groups. The process of coating with is described.

US Pat. No. 4,246,040 describes a method for surface treatment of powdered or granular solid materials such as titanium dioxide, which is intended to modify the hydrophilicity or lipophilicity of titanium dioxide. Reacting a basic polyaluminum salt with an acid or a salt thereof in the presence of titanium dioxide.

[0008] Methods for mitigating or avoiding the undesirable consequences of precipitation, agglomeration, and / or random deposition of titanium dioxide particles in aqueous alkaline treatment compositions are known in the art. This may be, for example, by encapsulating the titanium dioxide particles (eg, as disclosed in US Pat. No. 3,833,369) or by adding additional titanium dioxide particles to the treatment composition; As a result, in effect, precipitation of the titanium dioxide particles still occurs, but the amount present throughout provides adequate reflection.

As will be appreciated by those skilled in the relevant art, the effect of removing the precipitation of titanium dioxide particles in the aqueous alkaline processing composition can be achieved without detrimentally affecting the photographic quality of the diffusion transfer film unit. Can be difficult.
In other words, due to the complexity of the chemical interactions between the components of the processing composition, and the interaction of the processing composition with other components of the film unit, small changes in the formulation of the processing composition are obtained. It can greatly affect photographic products.

As the state of the art evolves, new approaches are continually being sought to achieve the required performance standards for the above systems. Thus, there is a need for new photographic processing compositions that are superior to photographic processing compositions already known in the art, and research is ongoing to provide such advantages.

It is, therefore, an object of the present invention to provide a novel photographic processing composition for use in a photographic diffusion transfer film unit.

It is another object of the present invention to provide a diffusion transfer photographic film unit that includes the novel processing composition.

SUMMARY OF THE INVENTION These and other objects and advantages are provided by the present invention,
This is achieved by providing a photographic processing composition comprising an aqueous alkaline medium having titanium dioxide particles therein and a stabilizer for maintaining the titanium dioxide particles well dispersed therein. This stabilizer comprises a polymer polymerized from a monomer system containing repeating units of styrene and acrylic acid.

[0014] If desired, the stabilizing polymer may further comprise repeat units of other monomers. Such additional monomers include acrylates, aminoacrylates and ethylene or butadiene.

An advantage of the present invention is that the precipitation of titanium dioxide particles in the treatment composition is substantially reduced, ie, the intended treatment composition has a substantially uniform distribution of titanium dioxide particles therein. Indicates that they are dispersed. Furthermore, in accordance with the present invention, a light-piping, diffusion-transfer photographic film unit having improved photographic quality, ie, the photographic quality of the image produced therein.
g), and haze caused by random deposition of the precipitated titanium dioxide particles on such film units, especially the image-receiving layer incorporated therein, is provided. Another advantage provided by the present invention is in extending the shelf life of a diffusion transfer film unit according to the present invention.

These and other objects and advantages provided in accordance with the present invention, together with detailed descriptions of various preferred embodiments thereof, will be in part apparent and in part hereinafter. It is described in. Accordingly, the present invention encompasses the products, compositions having the features, characteristics and relationships of the components exemplified in the following detailed disclosure, and the scope of application set forth in the claims.

For a better understanding of the features and objects of the present invention, reference should be made to the following detailed description of the preferred embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to photographic diffusion transfer products and processes. Generally, diffusion transfer photographic products and processes include a film unit having a photosensitive system that includes at least one layer of silver halide, usually associated with an image-providing material (eg, an image dye-providing material). . After exposure, the photosensitive system is generally developed outside of the exposure unit by the uniform distribution of the aqueous alkaline processing composition to the exposed components, so that the imageable material of the diffusible image providing material (imag) is exposed.
ewise) distribution is established. The image-providing material is in a superimposed relationship on the image-receiving layer, or the photosensitive component being developed, and is selectively mordanted, or selectively diffused by diffusion into the otherwise fixable component. ,
At least partially transcribed. The image receiving layer keeps the transferred image visible. "Peel-apar
In a diffusion transfer photographic product, referred to as the "t)" type, the image is seen in the image receiving layer upon proper separation of the image receiving material from the photosensitive material after a suitable period of imbibing. Such separation is not required in diffusion transfer photographic products, which are referred to as "integral".

As is well known in the art, a processing composition incorporated within a diffusion transfer instant film unit is developed by exposing the exposure film unit in ambient light excluded from an exposure device (eg, an instant camera). When exposed to light, it generally includes a dispersion of a visible light reflector (eg, titanium dioxide particles) to prevent fogging due to actinic light incident on the layers used in the processing compositions of the exposed film units or exposed film units. I do. As will be appreciated by those skilled in the relevant art, the material dispersed within the treatment composition should maintain sufficient diffusion, i.e.,
The treatment composition is evenly dispersed before use (eg, while the diffusion transfer film unit is left on a shelf or in a camera).

As described above, by using a processing composition such that the exposed film unit moves from the exposure device to the light source, the exposed diffusion transfer film unit can begin developing a photograph. This provides, for example, a processing composition in a breakable container located in a processing relationship along the leading edge of the diffusion transfer film unit, and between selected layers (eg, photosensitive components and image receiving materials). This is easily achieved by adapting the extent of the container in a substantially uniform layer of. Appropriate compression means, e.g., a set of superimposed rollers, are adjacent to the exit passageway of the exposure apparatus, and the compression force thus provided breaks the container when the film unit proceeds to the light source therethrough And cause diffusion of the treatment composition.

In this manner, when the film unit is moved toward the light source, the treatment composition containing the visible light reflector prevents fogging due to actinic light incident on the applied layer of the treatment composition. It is used like A suitable pH-sensitive optical filter agent, preferably a pH-sensitive phthalein dye, is added to the treatment composition (eg, US Pat. No. 3,647,3).
No. 47) also allows the film unit to be used immediately after the processing composition has been used in the process to be completed with ambient light while the photographer sees the transferred image appear. Can be ejected from the camera.

However, it has been found that due to a phenomenon called "light piping", some of the haze can occur along the back of the diffusion transfer film unit. That is, this part is finally removed from the exposure apparatus.
As will be appreciated by those skilled in the relevant art, fogging is caused by the incidence of light rays on the outer portion where the camera is moved into the film unit relative to the portion of the film unit, where the processing composition Things are not used, so
It is not protected by the application of visible light reflectors, generally titanium dioxide particles.

More specifically, while light is striking the outer portions of the film unit, the camera generally does not cloud corresponding portions of the film unit due to the presence of the visible light reflector. Thus, this portion of the light that scatters or diffuses along the film unit can be reflected internally and exposed, thus clouding the portion of the film unit inside the camera where the processing liquid has not yet been used. Given the speed of light, an attempt to eliminate the undesirable effect of light piping is to incorporate various substances, such as opaque agents and visible light reflectors, into the film unit. Is narrowed down to Accordingly, various materials, such as the above-described visible light reflectors (eg, titanium dioxide particles), somewhat mitigate or eliminate the above-described clouding phenomenon due to their highly efficient reflective properties, and the exposure therethrough. Can be used without adversely affecting the quality of the image obtained by the method. Such materials may then be provided to the film unit in the treatment composition and / or incorporated into the film unit as a layer.

For example, an image receiving material, particularly adapted for use with a peel diffusion transfer film unit, typically holds a transferred image disposed on a substrate layer of a suitable material, or disposed on a substrate layer. An image receiving layer for the combination of layers described above is embodied, each layer providing a particular and desired function adapted to the formation of the desired photographic image according to a diffusion transfer process. More specifically, in certain well-known embodiments, the image receiving material typically comprises a support material, preferably an opaque support material that supports the light reflecting layer for viewing the desired transferred image by reflection.

The integrated diffusion transfer film unit serves to cover the light-reflective pigment, which is stacked between the developed photosensitive layer (s), and the developed photosensitive layer (s), And generally includes an image receiving layer that provides a light reflective background that makes the photographic image visible. These layers are outer layers or durable laminates that typically include at least one support layer that is transparent so that the photographic image is visible therethrough.

As is well known in the relevant art, the light reflecting layer incorporated within the diffusion transfer film unit may be used as a coated layer or to receive an image of a film unit of a processing composition comprising a photographic emulsion layer and a light reflecting pigment. Layer, ie, a layer of the processing composition dispersed during processing of the film unit forming the light reflecting layer. More specifically, the light reflecting layer is formed by coagulation of the dispersed processing composition layer after exposure. That is, evaporation of water from the used processing composition layer results in a solidified light reflecting layer that allows the image receiving layer to be viewed through the transparent support.

In addition, the light-reflective layer formed by coagulation of the processing composition as described above may also combine the layers of the film unit to form a photographic laminate (including a temporary or permanent laminate). It can be designed to combine.

The present invention particularly relates to the properties of the photographic processing composition used in the photographic film unit of the present invention. In particular, such that the titanium dioxide particles of the treatment composition or coating layer reflect rather than randomly scatter the photochemically incident light at the film units,
It is understood by those skilled in the art that the titanium dioxide particles should be substantially uniformly distributed throughout the processing composition and / or layer of the film unit. Thus, the shelf life (e.g., of a diffusion transfer film unit with a breakable container comprising titanium dioxide in the treatment composition) is reduced if the titanium dioxide particles settle out of the treatment composition and become visible light. This results in an uneven distribution of the reflective material and a reduced ability to substantially reduce or prevent the deleterious effects of light piping.

The novel photographic processing composition of the present invention comprises an aqueous alkaline medium, light reflecting particles (for example, titanium dioxide particles).
And a polymeric stabilizer. The polymeric stabilizing materials utilized in accordance with the present invention include polymers polymerized from a monomer system that includes repeating units of styrene and acrylic acid. According to a preferred embodiment,
The stabilizing material may further include repeat units of other monomers, such as acrylates, aminoacrylates and ethylene or butadiene.

According to a preferred embodiment, the stabilizer can be represented by the following formula:

[0031]

Embedded image

[0032] Here: R _1, R _3, and R ₅ are alkyl each independently a hydrogen atom or n is represented by C _n H _{2n + 1} is an integer from 1 to 4; R ₂ is R is alkyl represented by C _p H _{2p + 1} where p is an integer of 1-10; R ₄ is alkyl represented by C _q H _{2q + 1} where q is an integer of 1-12; Is an integer from about 500 to about 20,000; b is an integer from 0 to about 14,000; c is an integer from 0 to about 6000; d is an integer from about 50 to about 1000; e. Is an integer from 0 to about 6000; and m is 1 or 2.

Thus, the stabilizer according to formula I comprises from about 500 to about 20,000 repeating units of styrene, from 0 to about 14,
000 repeating units of ethylene or butadiene, 0
From about 6000 repeating units of acrylate, from about 50 to
About 1000 repeating units of acrylic acid and 0 to about 6
000 repeating units of aminoacrylate. Such stabilizers include about 30% to about 90% by weight of styrene, about 1% to about 10% by weight of acrylic acid,
% To about 70% by weight of ethylene or butadiene;
% To about 30% by weight of acrylate and 0% to
About 10% by weight amino acrylate. In a particularly preferred embodiment according to the present invention, the stabilizer is styrene,
A terpolymer containing a repeating unit of acrylic acid and butadiene (formula I in which m is 2, c is 0, and e is 0) (te
rpolymer).

The polymeric stabilizer is a random copolymer and can be prepared by reacting the monomers in an aqueous solution in the presence of a surfactant and an initiator according to well-known reaction techniques. Thus, the polymer particles are obtained as a latex dispersion in an aqueous medium.

As is apparent from the repeating units of the polymer of the present invention, the polymeric stabilizing substance on the surface is latex particles having acidic functional groups (particularly carboxylate groups). The carboxylate groups ionize in an aqueous alkaline medium (ie, about pH 11 to about pH 14). In addition, the more ionic the stabilizer of formula (I), the greater the affinity of the ion (for example, to the surface of the titanium dioxide particles) and consequently the more effective its dispersing action.

Although the benefits provided by the photographic processing compositions of the present invention have been shown by extensive experimentation, it is not intended to be bound by any particular theory; It is conceivable to facilitate a substantially uniform distribution of the titanium dioxide particles in the treatment composition.

As is well known in the art, titanium dioxide particles dispersed in water are most stable at about pH 11.
Because the maximum repulsion between charged titanium dioxide particles (ie, the zeta potential (ZP)), which indicates the surface charge of the titanium dioxide particles, is the lowest (ie, the most negative) at about pH 11. :

[0038]

Embedded image

Thus, while any suitable method of preparing the aqueous alkaline treatment composition of the present invention may be used in the present invention, the preferred method of preparing the treatment composition is about pH 11
It is contemplated to utilize the ZP described above by including the step of preincubating the titanium dioxide particles with the stabilizer of the present invention in an aqueous alkaline solution of As described above, the maximum repulsion between the charged titanium dioxide particles at about pH 11 facilitates the reduced self-association of the titanium dioxide particles, and thus becomes negatively charged with the stabilizer, and specifically, It is conceivable to facilitate a stronger interaction with the carboxylate groups on the surface of the (ionized) stabilizer.

The polymeric material of formula (I) may be used in a highly alkaline environment (ie, above about pH 10, more particularly about pH 12-14, which is the pH commonly used in photographic development). ) And stable. Preferably, the particle size of the polymer is from about 50 nm to about 1000 nm. Further, the particles are discrete and homogeneous in an aqueous alkaline medium (eg, an aqueous alkaline photographic processing composition), and are substantially buoyant or suspendable.

The polymer particles advantageously interact with the titanium dioxide particles, ie, they are properly adsorbed on the surface of the titanium dioxide particles, in part, due to the desired Brownian motion. The density of the polymeric particles adsorbed on the titanium dioxide particles provides the desired effective density, i.e., the density of the combined latex and titanium dioxide particles substantially increases the density of the medium in which the particles are suspended (i.e., water). Similar to density.

The stabilizers of formula (I) can be prepared using any technique, for example,
book of Polymer Science, Pa
rtIII Polymerization, Fre
d. W. Billmeyer, Jr. , Intersc
Include techniques that are well known to those skilled in the art of organic chemistry and polymers, such as the method described in the article Publishers (1962). As will be appreciated by those skilled in the art, the repeating units of the polymerization can be random polymerization or can be controlled to the extent desired.
As can be seen from formula (I), the stabilizers of the present invention include repeating units of styrene and acrylic acid and, if desired, ethylene, as desired for any particular application. Or repeating units of diene, acrylate, and aminoacrylate may also be included. Any suitable order of repeating units can be used in the stabilizer.

Further, compounds within the scope of formula (I) are described, for example, under the trade name Joncryl87 under the trade name S.A. C. Johns
on Wax (Racine, Wisconsin) under the trade name Polilite LPF-6733
odyer Chemical (Akron, Ohi
o) from BA under the trade name Polystyrol-500
SF Corporation (Mount Olive
e, New Jersey) and the commercial name Kum
The Kumho Chemi in the ho-Kosyn KSL 100, 200, 300 and 600 series
cal Company (Yuseong, Taejr
on, Korea).

The amount of stabilizer (s) required in any particular case depends on a number of factors, for example, the amount of titanium dioxide particles in an aqueous alkaline solution, the processing prepared according to the present invention. The type of diffusion transfer film unit into which the composition is incorporated, and the desired result (e.g., light piping, haze, titanium dioxide particles to the image receiving layer of the film unit, if any, but little if any). And sedimentation).

Conventional scoping
A test may be performed to confirm the concentration of titanium dioxide particles and stabilizer (s) that are appropriate for any given application. For example, in a preferred embodiment,
The parameters given herein that result in a reflective layer, and the treatment composition, are given in particular by the titanium dioxide particles contained therein (which govern a percentage reflection of about 85% to about 90%). From the parameters, the appropriate amount of stabilizer (s) can be selected.

The preferred weight ratio of titanium dioxide particles to stabilizer is from about 1: 5 to about 1: 0.2. A more preferred weight ratio of titanium dioxide particles to stabilizer is from about 1: 2.5 to about 1: 0.5. Particularly preferred weight ratios of titanium dioxide particles to stabilizer are from about 1: 1.5 to
1: 1.

The treatment composition provided according to the present invention comprises:
Incorporated in a peel-off diffusion transfer film unit, typically, the treatment composition comprises from about 0.01% to about 5% by weight of titanium dioxide particles. In a preferred embodiment, the treatment composition comprises from about 0.02% to about 0.1% by weight.
Titanium dioxide particles, and about 0.02% to about 0.1% by weight.
Contains 5% by weight of stabilizer. In another preferred embodiment, the treatment composition includes about 0.1% by weight titanium dioxide particles and about 0.05% by weight stabilizer.

As mentioned above, and as exemplified by Formula I, the stabilizers used in accordance with the present invention include repeating styrene and acrylic acid groups and optionally include ethylene or butadiene groups, Contains acrylate and aminoacrylate groups. In a preferred embodiment of the present invention, the stabilizer comprises from about 1000 to about 10,000 repeating units of styrene (a is an integer from about 1000 to about 10,000), from about 200 to about 10,000 of ethylene or butadiene. About 2000 repeating units (b is an integer from about 200 to about 2000);
0 to about 1000 repeating units of acrylate (c
Is an integer from 0 to about 1000), and about 100 to about 500 repeating units of acrylic acid (d is about 100
From about 500 to about 500), and 0 to about 1000 repeating units of aminoacrylate (e is 0 to about 10
Which is an integer of 00). Certain preferred stabilizers according to the present invention contain from about 3.5% to about 4% by weight acrylic acid, from about 56% to about 56.5% by weight butadiene, and about 40% by weight styrene. I do.

The treatment composition of the present invention may comprise more than about 10
And often is an aqueous alkaline composition having a pH on the order of about 14. PH in the range of about 12 to about 14
Film unit adaptation (film un
it application), for example,
Alkaline substances such as sodium or potassium hydroxide can be used. P in the range of about 10 to about 12
For indications requiring an H value, for example, alkaline substances such as sodium carbonate, potassium carbonate or borates may be used. The intended treatment composition preferably comprises potassium hydroxide.

As mentioned above, the processing compositions of interest can be incorporated into any suitable diffusion transfer photographic system, including those related to both release and integral film products and processes. . Diffusion transfer photographic products and processes are well known and numerous patents (eg, US Pat. No. 2,983,606)
No. 3,345,163; No. 3,362,81
No. 9; No. 3,415,644; No. 3,594,1
No. 64; No. 3,594,165; No. 3,647,
No. 437; No. 3,719,489; No. 4,094
No. 8,783; No. 4,322,489; No. 4,7
No. 40,448; No. 5,320,929; No. 5,
415,970; and 5,569,574). The arrangement and order of the layers of the film unit used in such a process can vary in a manner known in the art.

The processing composition of the present invention can be used during photographic processing of any exposed photosensitive element, which is a photographic system for forming images in black and white or in color, and Is a metallic silver image, or an image formed by another imaging material.

The processing compositions, particularly the components herein, are for use in diffusion transfer photographic systems and are well known in the art, and therefore an extensive discussion of such processing compositions is needed. Not. For example, U.S. Patent Nos. 2,635,048; 2,644,756; 3,173,786; 3,351,465;
No. 3,353,956; No. 3,386,825
No. 3,455,685; No. 3,579,33
No. 3, No. 3,597,197; No. 3,619, 1
No. 55; No. 4,144,065; No. 4,168,
No. 166; 4,202,694; 4,24
No. 8,955; No. 4,255,512; No. 4,2
No. 67,255; No. 4,276,370; No. 4,
Nos. 324,853; 4,353,976; 4,680,247; 4,756,996; 4,496,651; 5,422,233;
No. 5,571,656; 5,591,560
No. 5,593,809; No. 5,593,81
No. 0; and 5,604,079.

[0053] Briefly, the intended processing compositions further include known silver halide developers, development inhibitors, opacity dyes, tint dyes, and typically such dyes. Contains other photographic agents, including compositions. As will be appreciated by those skilled in the art, the selection of the components of the processing composition along with the dyes and other components of the film unit generally depends on the pH environment of the film unit. About 12 ~
Preferred treatment compositions for release film units at a pH value of about 14 are shown in Table I herein. As will be appreciated by those skilled in the art, the treatment composition of the release film unit will generally be free of opacifying dyes, but may contain small amounts of light reflecting dyes.

As is well known in the art, to promote spreading in a diffusion transfer process, a photographic processing composition comprises
It can be incorporated into a breakable and brittle container. Examples of suitable breakable containers and methods of making them are described, for example, in U.S. Patent Nos. 2,543,181; 2,634,886; 3,653,732; and 3,056. 49
No. 1 can be seen.

Stabilizing the titanium dioxide particles in the aqueous alkaline treatment composition with the stabilizer of the present invention comprises:
The result is a substantially uniform distribution of the titanium dioxide particles within the processing composition, and the film unit is then substantially uniform between the selected layers of the photosensitive and image receiving elements as the light travels through the exposure apparatus. Layer, and does not adversely affect image quality (eg, does not inhibit dye transfer, or any undesired effects (eg, other sensitometer signals, rheological properties, or processing compositions from destroyed containers) No object spread), and eliminates the undesirable consequences of photoperforation (ie, fogging).

As mentioned above, the present inventors have not fully understood, and have argued, to any particular theory regarding how stabilizers maintain substantially titanium dioxide particles in suspension in a treatment composition, the present inventor. Is not the inventor's desire, but
The use of a latex polymer, which in turn becomes latex particles (ie, including titanium dioxide particles having the surface properties of a ball), affects the buoyancy agent (ie, its water solubility for very large molecules due to its low overall density). Function). The increased stability of the titanium dioxide particles within the treatment composition of the present invention is due, in part, to the steric hindrance of the contact between the titanium dioxide particles and to the ionic bonding between the carboxyl groups of the stabilizer and titanium dioxide as described above. It is also conceivable that it is due to formation.

The titanium dioxide particles stabilized according to the present invention (without the remaining components of the processing composition) may also be used as coating fluid components (eg, opacifying fluids) used to produce image recording materials. It is incorporated elsewhere within the film unit, in the image recording material (eg, a diffusion transfer film unit), as well as in the processing composition.

As mentioned above, the aqueous alkaline processing compositions of the present invention can be used in conjunction with any photographic emulsion. The preferred diffusion transfer film unit of the present invention preferably contains a negative acting silver halide emulsion, ie, one that is developed in the exposed areas.

In addition, the processing compositions of the present invention can be used with any image dye-providing material, such as a complete dye or dye intermediate (eg, a color coupler or dye-developer).
r))) may be used in conjunction with For example, as described in U.S. Pat. No. 2,983,606, a dye developer contains both a system of dye chromophores and a silver halide developing function within the same molecule.

In a preferred embodiment, the image recording material of the present invention (eg, a diffusion transfer photographic film unit)
Comprise one or more image dye-providing substances, which may be initially diffusible or non-diffusible.

In a diffusion transfer photographic system, image dye-providing materials which can be generally used include (1) a non-diffusible image mode which is initially soluble or diffusible in the processing composition but has a developing function. Or (2) is initially insoluble or non-diffusible in the processing composition, but selectively provides a diffusible product image modality as a developing function;
. The required difference in mobility or solubility can be obtained, for example, by a chemical reaction (eg, a redox reaction using a dye developer, a coupling reaction) or by a silver assisted fission reaction using a thiazolidine. obtain. As previously mentioned,
In a multicolor diffusion transfer film unit, one or more imaging mechanisms can be used.

Other suitable image dye providing materials include, for example,
U.S. Pat. No. 2,087,817; 3,227,5
No. 50; No. 3,433,939; No. 3,719,
No. 489; No. 3,725,062; No. 4,07
No. 6,529; No. 5,569,574; No. 5,5
No. 93,810; No. 5,571,656; No. 5,
No. 5,593,809; No. 5,593,810; and No. 5,604,079.
Included are those described in the item. Particularly preferred color-reducing multicolor diffusion transfer film units according to the present invention include, as image dye-providing substances, dye developers and dye-providing thiazolidine compounds (eg, US Pat. No. 4,744).
No. 0,448, wherein the cyan and magenta image dyes are dye developers and the yellow image dye is thiazolidine.

A particularly preferred diffusion transfer photographic film unit according to the present invention is intended to provide a multicolor dye image. A particularly preferred type of diffusion transfer film unit according to the present invention is one in which the image receiving element is designed to be separated from the photosensitive element after exposure and photographic processing are completed (ie, for example, US Pat.
Nos. 5,571,560; 5,593,809; 5,593,810; and 5,604,079;
Release type). However, the diffusion transfer film unit according to the present invention also has a so-called monolithic structure in which all film units are maintained together (eg, US Pat.
15,644)).

In brief, a preferred embodiment of a photographic diffusion transfer film unit designed, for example, to separate the image receiving element from the photosensitive element after exposure and photographic processing, typically comprises the following (1) ) To (4):
(1) a light-sensitive element comprising a support holding at least one silver halide emulsion layer; (2) a second sheet-like element superimposed or superimposable on the light-sensitive element;
(3) an image-receiving layer disposed on one of the photosensitive or second sheet-like elements, and (4) a water-soluble alkaline processing composition prepared according to the novel method disclosed herein. A rupturable container that holds and is arranged to be adapted to disperse the treatment composition between predetermined layers of these elements. Such rupturable containers or "pods" are conventional in the art and generally define a means for providing the processing composition to a photosensitive element and an image receiving element.

Further, the light-sensitive element preferably contains an image dye-providing substance associated with the silver halide emulsion layer (s). Further, the photosensitive element is preferably a red-sensitive silver halide emulsion having an associated cyan image dye-providing material, a green-sensitive silver halide emulsion layer having an associated magenta image dye-providing material, and an associated yellow image. And a blue-sensitive silver halide emulsion layer having the above dye-providing substance. The image dye providing material can provide a diffusible dye that can diffuse into the image receiving layer as a function of exposure during processing.

As noted above, preferred photographic diffusion transfer film units are intended to provide a multicolor dye image, and the photosensitive element is preferably capable of providing such a multicolor dye image. It is one of the things. The expression "color" as used herein includes the combination of the three dyes resulting in a black color. In a preferred black-and-white embodiment, the imaging element utilized is a composite silver that diffuses from the photosensitive element to the image receiving layer during processing. As mentioned above, both such photosensitive systems are well known in the art and therefore need not be described at length here in great detail.

The above preferred second sheet-like element or image-receiving element comprises a polymeric acid-reactive layer, a timing (or spacer) layer and a support holding the image-receiving layer. Each of these layers is retained by the support function in a predetermined manner to provide the desired diffusion transfer photographic processing known in the art, and any suitable material can be a polymeric acid-reactive layer, a timing layer or Used for the image receiving layer.

The image receiving element is disclosed in US Pat. No. 4,009,03.
No. 1, No. 5,346,800; and No. 5,591
After photographic processing as described in US Pat. No. 1,560, additional layers (eg, strip coat layers) designed to help separate the image receiving layer from the photosensitive element; and / or Patent No. 5,415,
It should also be understood that one or more overcoat layers described in US Pat. No. 969 and known in the art may be provided.

The material of the support can include any of a variety of materials capable of holding other layers of the image-receiving element. Paper, vinyl chloride polymer, polyamide (for example, nylon),
Polyester (for example, polyethylene terephthalate)
Alternatively, a cellulose derivative (eg, cellulose acetate or cellulose acetate-butyrate) may be used as appropriate. The side of the support opposite the light-sensitive or image-receiving layer can be coated, for example with a layer to prevent the stacked finished pictures from sticking together, providing a white surface and / or curling force of the coat. Offset.

Depending on the desired properties of the finished photo,
The nature of the support material, such as a transparent, opaque or translucent material, is a matter of choice. Typically, image receiving elements adapted to be used as release diffusion transfer film units and designed to separate after processing are based on opaque support materials. If photographic transparency processing is desired, the support is a transparent support material.

In one embodiment where the support material is a transparent sheet material, an opaque sheet (not shown), preferably pressure sensitive, is applied over the transparent support to provide in-light. Enables development. Photographic processing and removal of the opaque pressure-sensitive sheet results in imaging (imag).
Photographic images that are diffused into the e-bearing layer can be considered as transparency.

In another embodiment where the support material is a transparent sheet, opacifying materials such as carbon black and titanium dioxide are incorporated into the treatment composition (eg, in the invention described herein). And light development is possible.

As mentioned above, preferably the image-receiving element of the present invention comprises a polymeric acid-reactive layer. This polymeric acid-reactive layer can be applied to the image-receiving element, if desired, by coating the support layer with an organic solvent-based or water-based coating composition. The polymeric acid-reactive layer, typically coated with an organic-based composition, comprises a mixture of a half butyl ester of a polyethylene / maleic anhydride copolymer and polyvinyl butyral. Suitable water-based compositions for providing a polymeric acid-reactive layer include a mixture or binder, materials, of a water-soluble polymeric acid and a water-soluble matrix. Suitable water-soluble polymeric acids include ethylene / maleic anhydride copolymers and poly (methyl vinyl ether / maleic anhydride). Suitable water-soluble binders include, for example, polymeric materials such as those described in US Pat. No. 3,756,815 (eg, polyvinyl alcohol, partially hydrolyzed polyvinyl acetate, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxyethyl cellulose). Propyl cellulose, polymethyl vinyl ether, etc.).

The polymeric acid-reactive layer lowers the environmental pH of the film unit following the transfer of the imaging, and can be made of any suitable material (eg, US Pat. No. 3,362,8).
No. 19; No. 3,754,910; No. 3,756
No. 815; No. 3,819,371;
833, 367). The acid-reactive reagent is preferably a polymer containing acid groups (eg, carboxylic or sulfonic acid groups, which can form salts with alkali metals or organic bases), or anhydrides or lactones such as A group that potentially forms an acid. Preferred polymers are cellulose hydrogen phthalate acetate; polyvinyl hydrogen phthalate;
Polyacrylic acid; polystyrene sulfonic acid; and polymeric acids such as maleic anhydride copolymers and half esters thereof. In a particularly preferred embodiment, the polymeric acid-reactive layer comprises vinyl acetate ethylene latex and the free acid of a copolymer of methyl vinyl ether and maleic anhydride.

As mentioned above, preferably, the image receiving element of the present invention includes a timing layer. The timing layer may control the onset and rate of alkali capture by the acid-reactive polymer layer. The timing layer can be designed to operate in a number of ways. For example, the timing layer is a sieve (si
eve) and slowly treats the alkaline stream therethrough (eg, US Pat. No. 5,593,593).
No. 810). Alternatively, the timing layer may serve as a "hold and release"function; that is, the timing layer may serve as an alkali impermeable barrier for a given time interval upon the occurrence of a given chemical reaction, and then quickly and quantitatively It changes to a relatively alkali permeable state in a substantial manner. Additional examples of suitable materials for use as timing layers include, for example, U.S. Patent Nos. 3,575,701;
No. 587; No. 4,288,523; No. 4,29
No. 7,431; No. 4,391,895; No. 4,4
No. 26,481; No. 4,458,001; No. 4,
461,824; and 4,547,451.

In a preferred embodiment of the present invention, the processing composition of the present invention is incorporated into a diffusion transfer photographic film unit comprising a photosensitive element and an image receiving element (with an image receiving layer thereon). The image receiving layer is designed to receive, during processing, an imaging substance that diffuses from the photosensitive element in association with the image, and the image receiving layer may be, for example, U.S. Pat.
No. 148,061 and commonly assigned U.S. patent application Ser. No. 08 / 843,817 (filed Apr. 21, 1997). Vinylpyridine))
And any suitable material that is permeable to the alkali treatment composition (eg, polyvinyl alcohol), such as a pigmented material.

Another suitable image receiving layer material is disclosed in US Pat.
Includes graft copolymers of 4-vinylpyridine and vinylbenzyltrimethylammonium chloride grafted onto hydroxyethylcellulose, as described in U.S. Pat. Nos. 756,814 and 4,080,346. Suitable mordant materials of the vinylbenzyltrialkylammonium type are described, for example, in US Pat. No. 3,770,439.
No.

Suitable mordants, for example of the vinylbenzyltrialkylammonium type, are described, for example, in US Pat. No. 3,770,439. Mordant polymers of the hydrazinium type (eg, polymeric mordants prepared by quaternization of polyvinylbenzyl chloride with disubstituted asymmetric hydrazines) can be used. Such mordants are described in British Patent No. 1,022,207 (published May 9, 1966). One such hydrazinium mordant is, for example, poly (1-vinylbenzyl 1,1-dimethylhydrazinium chloride) which can be mixed with polyvinyl alcohol to provide a suitable image receiving layer.
It is.

Still other suitable mordant materials for use in the image receiving layer are described, for example, in US Pat. No. 4,794,067.
No. 5,591,560; and No. 5,591
No. 3,809, terpolymers including trimethyl-, triethyl- and tridodecyl-vinylbenzylammonium chloride.

In a particularly preferred embodiment of the invention, the image-receiving layer comprises vinylbenzyltrimethylammonium chloride, a terpolymer of vinylbenzyltriethylammonium chloride and vinylbenzyldimethyl-dodecylammonium chloride, and fully hydrolyzed polyvinyl alcohol. .

In a preferred embodiment, the image receiving element is a support material, ie, an opaque material that, by reflection, holds a light reflecting layer for viewing the desired transferred image thereon, following substantial transfer imaging. A polymeric acid-reactive layer adapted to lower the environmental pH of the film unit, a spacer or timing layer that slows the diffusion of alkali of the water-soluble alkali treatment composition of the present invention toward the polymeric acid-reactive layer; And an image receiving layer for receiving a transferred photographic image.

As described above, in a preferred embodiment of the present invention, the water-soluble alkali-treating composition of the present invention comprises, for example, US Pat. Nos. 3,567,442; and 3,390,99.
No. 1; and 3,607,269;
H. Land, H .; G. FIG. Rogers and V.W. K. W
alworth, J. et al. M. Ne of Storage edition
bullet's Handbook of Photo
ogrphy and Reprography, 7th edition, Van Nostrand Reinhold,
It is incorporated into a black-and-white diffusion transfer film unit as described in New York, 1977, pages 258-330.

In a preferred black-and-white embodiment, a light-sensitive element containing a light-sensitive silver halide emulsion is exposed to light and a water-soluble alkaline processing composition prepared according to the invention disclosed herein; A silver halide developing agent that reduces exposed silver halide to an insoluble form, and a silver halide solvent that dissolves unexposed silver halide or promotes its diffusion from the photosensitive element to the image receiving layer during processing Exposed image forming material. Thus, the image receiving layers utilized in such black-and-white embodiments typically comprise a visible silver black and white image upon precipitation or reduction of the soluble silver complex as is well known to those skilled in the art. To form a silver-precipitating substance.

The present invention will now be described in further detail by way of examples with respect to certain preferred embodiments, which are intended to be exemplary only, and the invention having been described herein. It should be understood that the invention is not limited to the materials, conditions, processing parameters, etc. described.
All parts and percentages stated are by weight unless otherwise indicated.

Example I Stabilization of Titanium Dioxide Dispersion Five dispersions were prepared: "Test 1,""Test2,""Test3," and "Test 4" according to the present invention, and "Control 1" was prepared in a manner identical to the four "test" dispersions but without the stabilizer.

The stabilizer is acrylic acid (about 3-4%)
And a repeating unit of styrene (70-80%) in a weight ratio of about 1:20.
In S. C. Johnson Wax (Racine,
Wisconsin).

The four test dispersions were prepared by adding the stabilizer to an aqueous solution of potassium hydroxide at about pH 14 and then combining the solution with an aqueous solution of potassium hydroxide containing titanium dioxide particles at about pH 11. ,
The dispersion was prepared by raising the pH of the dispersion to about pH14. The resulting dispersions, "Test 1", "Test 2", "Test 3" and "Test 4"
Contains about 0.1% by weight of titanium dioxide particles, and about 0.02%, 0.05% by weight, 0.1% by weight, respectively.
% Or 0.2% by weight of stabilizer was contained.

"Control 1" A dispersion was prepared by adding titanium dioxide particles to an alkaline aqueous solution of potassium hydroxide at a pH of about 11;
And then raise the pH of the solution to about pH14.
Prepared. The resulting dispersion contained about 0.1% by weight of titanium dioxide particles.

The degree of sedimentation and / or aggregation of the titanium dioxide particles in the five dispersions was determined by visual sedimentation (vis
ual setting and nephelometry. That is,

[0090]

Embedded image

The visible sedimentation (++, ++, + or none) and the turbidity of the five dispersions were measured as described above, and the results are shown in Table I. Here, TiO ₂
Is titanium dioxide, "NTU" stands for nephelometric unit, and as one skilled in the art will appreciate, a lower NTU value indicates greater precipitation of the titanium dioxide particles.

[0092]

[Table 1]

As understood by the data in Table I,
Dispersions of titanium dioxide prepared according to the novel method of the present invention exhibit substantially higher turbidity values than dispersions prepared in the same manner but without the stabilizer of the present invention. As shown, it shows much lower sedimentation.

Example II Diffusion Transfer Photographic Film Units Containing the Subject Processing Composition Two peelable diffusion transfer photographic film units were prepared: about 0.1% by weight titanium dioxide particles and about 0.1%.
"Test 5" prepared in accordance with the present invention using an aqueous alkaline treatment composition containing a weight percent stabilizer, Joncryl 87; and a "Control 2" film unit, ie prepared in generally the same manner as Test 5. Although a film unit, the aqueous alkali treatment composition did not include a stabilizer.

The image-receiving element used in the peelable film unit described above includes a white colored, polyethylene-coated, opaque photographic film support, which is continuous with the following: Was coated thereon: 1. AIRFLEX ^™ 465 (vinyl acetate ethylene latex, Air Products C
o. ) And GANTREZ ^™ S-97 (free acid of a copolymer of methyl vinyl ester and maleic anhydride, from GAF Corp.).
polymeric acid reactive layer which is coated with the scope of g / m ^{2; 2.} A copolymer of diacetone acrylamide and acrylamide grafted on polyvinyl alcohol
Parts, as well as an aqueous polymeric emulsion (ie, Bayhydrol PU-402A (Ba)
yer), one part of an aliphatic polyester urethane polymer available commercially and under about 4950 mg
^2. timing layer coated with a coverage of / m ² ; Image receiving layer coated in the range of about 3228 mg / m ² , including: vinylbenzyltrimethylammonium chloride, vinylbenzyltriethylammonium chloride and vinylbenzyldimethyldodecylammonium chloride (6.7 / 3.3 / 1% by weight, respectively) And AIRVOL ^™ 425 (fully hydrolyzed polyvinyl alcohol, Air P
products Co. products. 3); and 4. About 40% by weight of a terpolymer of acrylic acid, hydroxypropyl methacrylate and 4-vinylpyrrolidone
And about 60% by weight carboxymethyl guar (gua)
a) a strip coat layer coated at a coverage of about 134 mg / m ² containing r).

Diffusion transfer photographic film units containing the above described polyester urethane polymers are disclosed and claimed in US Pat. No. 5,593,810.

The light-sensitive element utilized in the diffusion transfer photographic film unit includes an opaque, subcoated, polyethylene terephthalate photographic film base, which has in turn the following: The following formula

[0098]

Embedded image

About 807 mg / m ² of cyan dye developer, about 448 mg / m ² of gelatin, about 15 mg / m ²
1. a layer of a cyan dye developer comprising 1 / m ² of zinc bis (6-methylaminopurine) and about 120 mg / m ² of bis-2,3- (acetamidomethylnorbornyl) hydroquinone (“AMNHQ”); About 224mg / m ² of silver iodine bromide (0.7μm), silver iodine bromide of about 785mg / m ² (1.5μm), silver iodine bromide of about 112mg / m ² (1.8μm) and about 561mg /
^2. a layer of red-sensitive silver iodobromide containing m ² gelatin; About 2325 mg / m ² of butyl acrylate / diacetone acrylamide / methacrylic acid / styrene / acrylic acid copolymer, about 97 mg / m ² of polyacrylamide, about 124 mg / m ² of N-hydroxymethyldimethylhydantoin and about 3 mg / m 2 ^3. an intermediate layer comprising ² succindialdehyde; The following formula

[0100]

Embedded image

Magenta dye developer containing about 374 mg / m ² of magenta dye, about 400 mg / m ² of 2-phenylbenzimidazole, about 20 mg / m ² of cyan filter dye and about 248 mg / m ² of gelatin 4. a dye developer layer; About 250 mg / m ² of carboxylated styrene butadiene latex (Dow 620 latex)
5. a) a spacer layer comprising x) and about 83 mg / m ² of gelatin; About 236mg / m ² of silver iodine bromide (0.6μm), silver iodine bromide of about 33mg / m ² (1.1μm), silver iodine bromide of about 378mg / m ² (1.3μm) and 437mg / m ²
6. a layer of green-sensitive silver iodobromide containing the gelatin of About 100 mg / m ² of AMNHQ, about 20 mg / m ²
Bis (6-methylaminopurine), about 75 mg / m ²
7. a layer comprising 6-hydroxy-4,4-5,7,8-pentamethyl-3,4-dihydrocoumarin and about 73 mg / m ² of gelatin; Intermediate layer comprising a polyacrylamide copolymers and about 76 mg / m ² according to about 1448mg / m ² of the layer 3; 9. About 100 mg / m ² scavenger, 1-octadecyl-4,4-dimethyl-2- [2-hydroxy-5
-(N- (7-caprolactamide (caprolact)
9. tamido)) a layer comprising sulfonamido-phenyl] thiazolidine, about 20 mg / m ² of magenta filter dye and about 440 mg / m ² of gelatin; 10. a yellow filter layer comprising about 280 mg / m ² of benzidine yellow dye and about 105 mg / m ² of gelatin; The following formula of about 910 mg / m ²

[0102]

Embedded image

11. a yellow image dye-providing layer comprising about 364 mg / m ² of gelatin and a yellow image dye-providing substance represented by the formula: About 850 mg / m ² of norbornyl tertiary butylhydroquinone (NTBHQ) and dimethyl terephthalamide (DMPTA) layer was coated with the scope of the hydrogen bonded complex and about 350 mg / m ² of gelatin; 13. About 81 mg / m ² of silver iodine bromide (1.2 [mu] m), a layer of blue-sensitive silver iodine bromide containing approximately 189 mg / m ² of silver iodine bromide (2.0 .mu.m) and about 135 mg / m ² of gelatin;
And 14. About 400mg / m ² UV filter material, Ti
Nuvin (Ciba-Geigy), about 200 mg /
m ² ditertiary butyl hydroquinone (DTBH
Q), about 50 mg / m ² of releasable antifoggant (a
ntifogant)

[0104]

Embedded image

A layer comprising about 80 mg / m ² of benzidine yellow filter dye and about 73 mg / m ² of gelatin.

The film units of the examples were prepared utilizing the image receiving element and the photosensitive element described above. In each case, after exposure of the photosensitive element, the image receiving element and the photosensitive element are arranged in a face-to-face relationship (i.e., their respective supports are outermost); A breakable container (i.e., a pod containing the aqueous alkaline processing composition) is then attached at the leading edge of each film unit between the image receiving element and the photosensitive element, thereby providing a container at compression pressure. The marginal edge (margina)
Along the edge, the container seal is broken and the contents are evenly distributed between the elements.

The chemical compositions of the aqueous alkaline treatment compositions incorporated in Control 2 and utilized for their treatment are shown in Table II below.

[0108]

[Table 2]

About 0.20% by weight of the stabilizer, Joncry 187, based on the novel treatment composition disclosed herein.
The aqueous alkaline treatment composition incorporated in the Test 5 film unit, except that
Same as I.

Both diffusion transfer photographic film units prepared above were allowed to age at about 60 ° C. for about 14 days.
ed), which is equivalent to about 2 years of aging (eg, time spent on shelves before use).

Sensitometric (sensitometric)
c) After exposure to the target, each film unit:
Pass through a roller pair located at a gap spacing of about 0.0034 inches (0.0864 mm) and
After an impulsive period of seconds, the photosensitive element and the receiving element were separated from each other.

The maximum (D _max ) and minimum (D _min ) reflection densities of the red, green and blue colors are defined as MacBe.
th densitometer and read the data from Table III
Report to

[0113]

[Table 3]

From the _Dmax data reported in Table III, those skilled in the art will appreciate that both Control 2 and Test 5 can diffuse sufficient image of the dye-providing material into the image receiving layer. From the D _min data in Table III, it can also be seen that both Control 2 and Test 5 provide an acceptable background to the photograph.

In addition to the beneficial effects described above, and as determined by visual inspection and handling of the finished photograph obtained from the diffusion transfer photographic film unit "Test 5" of this example, the invention Undesirable effects of optical piping (eg, defocus,
Image along the edge of the photo, indicating that it has been torn,
And "control 2" which substantially reduced brownish edges) and lacked the subject stabilizer
The sedimentation of titanium dioxide particles on the image-receiving layer of this film unit was substantially eliminated when compared to that of this film unit.

Thus, as shown by the data reported in Table III and the handling of the visual tests and finished photographs, the subject treatment compositions hinder light piping and hinder dye transfer. Random sedimentation of titanium dioxide particles on the image receiving layer without or negatively affecting the desired rheological characteristics (eg, those important for proper diffusion of the processing composition). Hinder.

Since certain changes can be made in the above subject matter without departing from the spirit and scope of the invention contained herein, all matter included in the above description and the accompanying examples are It is intended to be interpreted as an explanation, not in a limiting sense.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-48792 (JP, A) JP-A-1-206336 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03C 8/32

Claims (11)

(57) [Claims] 1. A photographic processing composition for use in a photographic diffusion transfer film unit, said composition comprising 10
A polymer polymerized from a monomeric system comprising an aqueous alkaline medium having a pH above and containing therein titanium dioxide particles and a stabilizer, wherein the stabilizer comprises repeating units of styrene and repeating units of acrylic acid. A photographic processing composition comprising: 2. A photographic processing composition according to claim 1, wherein said stabilizer is of the formula Is represented by wherein: R _1, R _3, and R ₅ are alkyl each independently a hydrogen atom or n is represented by C _n H _{2n + 1} is an integer from 1 to 4; R ₂ Is an alkyl represented by C _p H _{2p + 1} where p is an integer from 1 to 10; R ₄ is an alkyl represented by C _q H _{2q + 1} where q is an integer from 1 to 12 A is an integer from 500 to 20,000; b is an integer from 0 to 14,000; c is an integer from 0 to 6000; d is an integer from 50 to 1000; A composition, wherein m is 1 or 2. 3. The photographic processing composition according to claim 2, wherein the stabilizer is 30% to 90% by weight of styrene, 1% to 10% by weight of acrylic acid, 0% by weight.
~ 70 wt% ethylene or butadiene, 0 wt% ~
30% by weight of acrylate and 0% to 10% by weight
A composition comprising the amino acrylate of 4. The stabilizer according to claim 3, wherein the stabilizer contains 3.5% to 4% by weight of acrylic acid, 56% to 56.5% by weight of butadiene, and 40% by weight of styrene.
4. A photographic processing composition according to claim 1. 5. The photographic processing composition according to claim 1, wherein the weight ratio of said titanium dioxide particles to said stabilizer is from 1: 5 to 1: 0.2. 6. The photographic processing composition according to claim 5, wherein the weight ratio of said titanium dioxide particles to said stabilizer is from 1: 1.5 to 1: 1. 7. A diffusion transfer photographic film unit comprising a photosensitive element, the photosensitive element comprising: a support carrying at least one silver halide emulsion layer associated with an image dye-providing substance; A second sheet-like element in a relationship placed over, or adapted to be placed in, a relationship placed over the photosensitive element; one of the photosensitive element and the second sheet-like element An image-receiving layer disposed within the element; and an aqueous-alkaline processing composition for dispersion between predetermined layers of the element, the aqueous-alkaline processing composition comprising an aqueous-alkaline medium having a pH greater than 10. Including titanium dioxide particles and a stabilizer therein;
Means for the stabilizer comprising a polymer polymerized from a monomer system comprising: a repeating unit of styrene and a repeating unit of acrylic acid. 8. The light-sensitive element wherein the red-sensitive silver halide emulsion layer associated with a cyan image dye-providing substance, the green-sensitive silver halide emulsion layer associated with a magenta-color image dye-providing substance, and a yellow image dye-providing substance. The photographic film unit according to claim 7, comprising a blue-sensitive silver halide emulsion layer associated with. 9. The photographic film unit according to claim 8, wherein said stabilizer is represented by the following formula: Wherein: R _1, R _3, and R ₅ is alkyl hydrogen atom or n each independently are represented by C _n H _{2n + 1} is an integer from 1 to 4; R ₂ is p is 1 is alkyl represented by C _p H _{2p + 1} is an integer of to 10; R ₄ is an alkyl q is represented by C _q H _{2q + 1} is an integer from 1 to 12; a is 500 B is an integer from 0 to 14,000; c is an integer from 0 to 6000; d is an integer from 50 to 1000; e is an integer from 0 to 6000; And m is 1 or 2, a photographic film unit. 10. The photographic film unit according to claim 9, wherein the stabilizer comprises 30% to 90% by weight of styrene, 1% to 10% by weight of acrylic acid,
Wt% to 70 wt% ethylene or butadiene, 0 wt% to 30 wt% acrylate and 0 wt% to 10 wt%.
A photographic film unit comprising, by weight, amino acrylate. 11. The composition according to claim 1, wherein the stabilizer is 3.5% to 4% by weight.
Acrylic acid, 56% to 56.5% by weight butadiene, and 40% by weight styrene.
The photographic film unit according to 0.