Abstract: Novel electron donor precursors have the structure: ##STR1## where: R is an alkali labile group;Y is an aliphatic or aromatic group; andZ is an electron withdrawing group.The compounds are useful in photographic elements, film units and processes to provide electrons to immobile compounds which must accept at least one electron before releasing a diffusible dye or photographic reagent.

Abstract: A new method to produce photographic images is provided which comprises(a) imagewise exposing a photographic assembly which contains at least during the silver halide developing step, in order optionally a supercoat layer, at least one silver halide emulsion layer, a layer containing a modifiable image substance and a photobase, there being optionally one or more interlayers between each of said components(b) treating the exposed photographic assembly with an aqueous processing bath so as to provide in the silver halide emulsion layer or layers a solution or dispersion of an image substance modifying/silver halide developing compound (dymodev compound), thereby to develop the latent silver image in the silver halide emulsion(s), and(c) in the non-latent image areas allowing the dymodev compound to diffuse in a counter-imagewise manner from the silver halide emulsion layer(s) to the layer containing the modifiable image substance and there to modify reductively the image substance.

Abstract: A photographic material for the production of multicolor images by means of diffusion transfer of complexed silver halide which includes a support having thereon at least three differently spectrally sensitive silver halide emulsion layers that are each sensitive to light of a different additive primary color, associated with each silver halide emulsion layer a silver precipitating layer containing development nuclei and a different dye-releasing compound for producing a subtractive multicolor image, and optionally one or more non-light-sensitive, non dye-releasing water-permeable hydrophilic colloid interlayers. In this material for better color separation the layers are arranged in a special order including the juxtaposition of two of the emulsion layers or separation thereof by layers penetrated by complexed silver halide so that the emulsion layers act as barriers against cross-diffusion.

Abstract: Photographic elements, film units, processes and alkaline processing compositions are described wherein certain substituted 1-phenyl-3-pyrazolidinones are employed as electron transfer agents in color image transfer materials. The silver halide electron transfer agents or precursors thereof have the following formula: ##STR1## wherein: R is hydrogen or a hydrolyzable moiety;R.sub.1 is hydrogen or a hydroxy group;R.sub.2, R.sub.3 and R.sub.4 each represent hydrogen, hydroxy, an alkyl group of 1 to 3 carbon atoms, an alkoxy group of 1 to 3 carbon atoms, a phenyl group, --NHSO.sub.2 R.sub.5, --O(CH.sub.2).sub.n OR.sub.6, --(CH.sub.2).sub.n OR.sub.6, --O(CH.sub.2).sub.n C.sub.6 H.sub.5, --(CH.sub.2).sub.n R.sub.7, or --O(CH.sub.2).sub.n R.sub.7 ;R.sub.5 is hydrogen or an alkyl group of 1 to 3 carbon atoms;R.sub.6 is hydrogen or a methyl group;R.sub.7 is NHS0.sub.2 R.sub.5 or SO.sub.2 NHR.sub.5 ; andn is a positive integer of 1 to 2;with the proviso that at least one of R.sub.2, R.sub.3 and R.sub.

Abstract: Novel electron donor precursors have the structure: ##STR1## wherein: Z represents the atoms to complete a mono-, bi- or tricyclic ring system, each ring of which contains 5 to 6 nuclear atoms;n is 1 or 2;R.sup.1 is a monovalent aromatic group when n is 1 and a bivalent aromatic group when n is 2; andR.sup.2 represents hydrogen, an alkyl group, an aryl group, an acyl group, an ester group or an amido group.The compounds are useful in photographic elements, film units and processes to provide electrons to immobile compounds which must accept at least one electron before releasing a diffusible dye or photographic reagent.

Abstract: A method is disclosed of photographically processing a negative-working imagewise exposed silver halide photographic element to produce a reversal dye image comprising (a) developing the imagewise exposed silver halide with an electron transfer agent to produce oxidized electron transfer agent which reacts with a competing oxidizable substance and (b) developing silver halide remaining with the electron transfer agent in the presence of a dye image providing compound capable, after the competing oxidizable substance has been depleted, of reacting with the oxidized electron transfer agent to produce a reversal dye image. Image transfer film units are disclosed useful in the practice of this method. Such film units include those containing in addition to the competing oxidizable substance and initially immobile dye image providing compound a layer containing additional silver halide and a scavenger separating the additional silver halide from the immobile dye image providing compound.

Abstract: A multicolor diffusion transfer photographic system wherein development of an exposed multilayer photsensitive element is effected in the presence of a ligand which is represented by the formula ##STR1## wherein R is hydrogen, alkyl or hydroxyalkyl, m is an integer of from 3 to 10 and n is 0 or an integer of from 1 to 3 with the proviso that the sum of m and n is not greater than 10.

Abstract: Hydroquinone esters are incorporated in photographic elements for color diffusion transfer assemblages and release a competing developer upon contact with a processing composition, to terminate further dye release. The hydroquinone esters are employed in a concentration sufficient, upon hydrolysis, to reduce substantially all the silver in the silver halide emulsion.

Abstract: A multicolor diffusion transfer photographic system wherein development of an exposed multilayer photosensitive element is effected in the presence of an oligomer which is represented by the formulaR.sub.1 O(CH.sub.2 CH.sub.2 O).sub.m R.sub.2wherein R.sub.1 and R.sub.2 each independently may be --CH.sub.3 or --C.sub.2 H.sub.5 and m is an integer of from 4 to 10.

Abstract: Said material contains a quinone-type compound which corresponds to one of the formulae (A) or (B) and which is capable in reduced state and under alkaline conditions of releasing a photographically useful group e.g. a dye: ##STR1## wherein: each of (Nuox).sup.1 and (Nuox).sup.2 represents an oxidized nucleophilic group,Z represents a bivalent atomic group which is electronegative,Q together with the Z group represents a releasable photographically useful group,each of R.sup.1, R.sup.2 and R.sup.3 is hydrogen, halogen, alkyl, alkoxy, or an acylamino group or R.sup.1 and R.sup.2 in adjacent positions on the ring form a ring fused with the remainder of the molecule, or R.sup.2 and R.sup.3 together are fused with the remainder of the molecule.each of R.sup.4 and R.sup.5 represents hydrogen or a hydrocarbon group.At least one of the substituents R.sup.1, R.sup.2, R.sup.3, R.sup.4 or R.sup.5 is a ballasting group X.

Abstract: Aromatic nitro compounds are disclosed where the aromatic ring contains electron-withdrawing groups and said aromatic nitro compound is capable of undergoing intramolecular nucleophilic displacement after reduction of the nitro group. The compounds are especially useful in photographic elements where an image dye-providing material or a photographic reagent are released upon cleavage from the compound.

Abstract: Photographic elements, film units, processes and alkaline processing compositions are described wherein certain subsituted 1-phenyl-3-pyrazolidinones are employed as electron transfer agents in color image transfer materials. The silver halide electron transfer agents or precursors thereof have the following formula: ##STR1## wherein: R is hydrogen or a hydrolyzable moiety;R.sub.1 is hydrogen or a hydroxy group;R.sub.2, R.sub.3 and R.sub.4 each represent hydrogen, hydroxy, an alkyl group of 1 to 3 carbon atoms, an alkoxy group of 1 to 3 carbon atoms, a phenyl group, --NHSO.sub.2 R.sub.5, --O(CH.sub.2).sub.n OR.sub.6, --(CH.sub.2).sub.n OR.sub.6, --O(CH.sub.2).sub.n C.sub.6 H.sub.5, --(CH.sub.2).sub.n R.sub.7, or --O(CH.sub.2).sub.n R.sub.7 ;R.sub.5 is hydrogen or an alkyl group of 1 to 3 carbon atoms;R.sub.6 is hydrogen or a methyl group;R.sub.7 is NHSO.sub.2 R.sub.5 or SO.sub.2 NHR.sub.5 ; andn is a positive integer of 1 to 2;with the proviso that at least one of R.sub.2, R.sub.3 and R.sub.

Abstract: This invention is concerned with the use of certain pyridine N-oxides in diffusion transfer products and processes employing dye developers.

Abstract: Novel photographic processing compositions including a polymeric oxime viscosity-increasing reagent for processing an exposed film unit to provide a photographic image. While this photographic image may be in black-and-white or in color and prepared by any of the heretofore known systems, of particular interest are color diffusion transfer systems for preparing a color image viewable without separation of any of the components or layers of the photographic product. The invention also includes a novel class of polymeric oximes which may be employed in such compositions.

Abstract: In a photographic element for the color diffusion transfer process including a neutralizing system for reducing the pH of an aqueous alkaline processing solution which comprises a neutralizing layer and a timing layer, the improvement which comprises the timing layer comprising a polymer latex which is produced by emulsion polymerization of (1) each of (A) at least one monomer selected from the group consisting of ethylene-type monomers having at least a free carboxylic acid group, a free sulfonic acid group or a free phosphoric acid group or a salt thereof and (B) at least one monomer selected from the group consisting of monomers represented by the following general formula (I) ##STR1## wherein X is a hydrogen atom, a methyl group or a --COOR.sup.1 group; Y is a hydrogen atom, a methyl group or a --(CH.sub.2).sub.n COOR.sup.2 group; Z is an aryl group, a --COOR.sup.3 group or a ##STR2## group; R.sup.1, R.sup.2 and R.sup.

Abstract: Non-diffusible thioether compounds capable of releasing, on reaction with color developer oxidation compounds, a diffusible silver halide development inhibitor without at the same time forming permanent dyes to any substantial extent are characterized by containing a group of the formula ##STR1## or its tautomeric form, wherein Z.sup.1 represents an electron attracting substituent and X represents an aliphatic, aromatic or heterocyclic group that if released together with the sulfur atom, forms a diffusible silver halide development inhibiting mercaptane.

Abstract: A process of forming color images comprises imagewise exposing a silver halide photographic color image-transfer product comprising an image dye-providing compound in the presence of a silver halide developer, and treating the exposed photographic product with an alkaline processing composition in the presence of an amino acid or a combination of an acid and an amine. Color images are achieved having excellent image discrimination (Dmax-Dmin).