Abstract: A dry image-forming process is disclosed. The dry image-forming process of the invention comprises heat developing a light-sensitive material comprising a support having thereon at least a photosensitive silver halide, a binder, and a dye releasing redox compound said dye releasing redox compound being reductive to the photosensitive silver halide and being capable of releasing a hydrophilic dye upon reaction with the photosensitive silver halide under heating, after or simultaneously with imagewise exposure, to form imagewise a mobile hydrophilic dye and heating, after simultaneously with the heat development, the light-sensitive material together with a dye-fixing layer in the presence of a hydrophilic thermal solvent to thereby transfer the mobile hydrophilic dye onto the dye-fixing layer to form a dye image and fix the dye image. The heat development is carried out in a state containing substantially no water, and the whole of steps are carried out without particular supplying a solvent.

Abstract: Disclosed is a heat developable light-sensitive material that comprises a support having thereon at least one light-sensitive layer containing a silver halide emulsion, a dye-donating substance and a reducing agent, wherein at least one subbing layer comprised of a hydrophobic polymer is provided between the light-sensitive layer nearlest to the support and the support, and at least one said subbing layer contains a photographic useful reagent.A heat developable light-sensitive material according to this invention, can provide control fogging and raise the maximum density, or can improve the maximum density difference without exerting adverse effects on sensitivity and preservability.

Abstract: A color light-sensitive material comprising a support having thereon at least one light-sensitive layer containing light-sensitive silver halide, and further comprising in the at least one light-sensitive layer or any other layer, independently, a binder, a reducible dye-providing compound, and a reducing agent represented by formula (I): ##STR1## wherein X represents --CO-- or --SO.sub.2 --; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group, an aryl group or a heterocyclic group, any of which groups may be substituted; R.sup.3 represents a hydrogen atom, a halogen atom, an aryl group, an acylamino group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, a sulfonyl group, a carbamoyl group or a sulfamoyl group, any of which groups may be substituted; R.sup.2 and R.sup.3 may be combined together to form a carbocyclic ring or a heterocyclic ring; and the reducing agent may be in the form of a dimer or a trimer through R.sup.1 or R.sup.

Abstract: The present invention relates to a silver halide color reversal photographic material comprising photosensitive silver halide photographic layers in which the average silver chloride content of the photosensitive silver halide emulsions is less than 7.0 mol %, at least one emulsion layer of the photographic layers consists of two or more emulsions having different average grain diameters, and the emulsion layer and/or the adjacent intermediate layer contains at least one compound that can release a photographically useful agent by redox reaction with the oxidation product of a developing agent. The silver halide color reversal photographic material of the present invention has a color-reversed image improved in graininess and sensitivity.

Abstract: A diffusion transfer-type silver halide color photographic photosensitive material comprising a support, having thereon at least a photosensitive thermally developable silver halide, a binder, a dye donating compound which is fast to diffusion and which forms or releases a diffusible dye, a development inhibitor releasing compound which releases a development inhibitor and a compound represented by formula (I)R.sup.1 --Y--O--H [I]wherein R.sup.1 represents an alkyl group, an aryl group, an alkylamino group, an arylamino group, an alkoxy group, an aryloxy group, a heterocyclic residual group or a polymer residual group of said groups, Y represents ##STR1## or --SO.sub.2 --NR.sup.2 -- and R.sup.2 represents a hydrogen atom, an alkyl group, an aryl group or an acyl group, and R.sup.1 and R.sup.2 may be joined together to form a five or eight membered ring is disclosed.

Abstract: A color diffusion transfer light-sensitive material comprising a support having thereon light-sensitive silver halide emulsions and an electron donor in combination with reducible dye providing compounds each of which releases a diffusible dye when reduced and further a silver halide emulsion having substantially no light sensitivity in addition to the light-sensitive silver halide emulsions.

Abstract: Disclosed is a silver halide photographic material comprising a support having thereon at least one layer containing a compound represented by general formula (I): ##STR1## wherein EAG represents an electron-accepting group; A represents a group which undergoes a reaction triggered by the cleavage of the oxygen-nitrogen single bond in the general formula to release PUG; B represents a hydrogen atom or an alkyl group, an aralkyl group, an aryl group, a heterocylic group, an acyl group, a sulfonyl group, a carbamoyl group, a sulfamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkoxysulfonyl group or an aryloxysulfonyl group which may contain substituents; the solid lines indicate a single bond; the broken lines indicate that either of these line is a bond, with the proviso that when the broken line between N and A represents a bond, B is not present; EAG and B, and A and B may be connected to each other to form a ring; EAG may be connected to a polymer residue to fix the compound of general f

Abstract: A heat-developable color photographic material comprising a support having thereon at least a light-sensitive silver halide, a binder, at least one of an electron-donating agent and a precursor thereof, a reducible dye-forming compound which releases a diffusible dye by reduction and an electron-transferring agent, wherein an electron-transferring agent precursor co-exists together with the electron-transferring agent.

Abstract: A heat developable color photosensitive material capable of forming color images in a heat development, more particularly, capable of obtaining heat developable color diffusion transfer images substantially high in a maximum density. The heat developable color photosensitive material contains at least two photosensitive layers which are different from each other in color sensitivity and a non-photosensitive interlayer containing particles interposed between the photosensitive layers.

Abstract: A photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound and an aromatic ketone and a borate salt; and photosensitive materials employing the composition where in one embodiment the composition is microencapsulated.

Abstract: A color light-sensitive material comprising at least light-sensitive silver halide, a binder, a reducible dye providing compound and a reducing agent represented by the following formula (I). ##STR1## wherein R.sup.1 and R.sup.2 each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an acylamino group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, a sulfonyl group, a carbamoyl group or a sulfamoyl group, or R.sup.1 and R.sup.2 may be combined together to form a carbon ring or a heterocyclic ring; R.sup.3 represents an alkylene group; R.sup.4, R.sup.5, R.sup.6 and R.sup.

Abstract: A novel blocked photographically useful compound comprises a new blocking group that (a) comprises two electrophilic groups, the least electrophilic of which is bonded directly or through a timing group to the photographically useful group (PUG) of the compound, (b) is capable of reacting with a dinucleophile reagent, and (c) has the two electrophilic groups separated from each other by a bond or unsubstituted or substituted atom that enables nucleophilic displacement to occur with release of PUG when the compound is reacted with a dinucleophile reagent. Such a blocked photographically useful compound is useful in a photographic material and process to provide increased stability and enable more rapid release of the photographically useful group upon reaction with a dinucleophile reagent.

Abstract: A heat-developable color light sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder, a non-diffusible compound capable of releasing a diffusible dye upon reduction, an electron donor compound and an electron transfer agent, said electron transfer agent being represented by formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents hydrogen, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; R.sub.5 represents a halogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkoxy group; R.sub.6, R.sub.7, R.sub.8 and R.sub.

Abstract: A silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, at least one layer of the material containing the combination of a water-insoluble homopolymer or copolymer which has an amido bond in the repeating unit and at least one compound represented by formula (I): ##STR1## wherein X represents an alkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an amido group or a sulfonamido group; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an amido group, a sulfonamido group, hydrogen, a halogen atom, a sulfo group, a carboxyl group, a carbamoyl group, a sulfamoyl group, an acyl group or a sulfonyl group, provided that R.sup.1 and R.sup.2 may be linked to form a carbocyclic ring; and Y represents a hydroxyl group or a sulfonamido group.

Abstract: A novel information recording medium comprising a substrate and a recording layer for writing and/or reading information by means of a laser beam which is provided on the substrate is disclosed. The recording layer contains a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, and an organic solvent-soluble silver salt. Alternatively, the recording layer contains said chromophore and this recording layer is arranged in contact with a layer of an organic solvent-soluble silver salt.

Abstract: A silver halide photographic material which comprises a support having coated thereon a light-sensitive silver halide emulsion layer, wherein the photographic material contains a blocked photographic agent represented by the following general formula (I): ##STR1## wherein A represents a photographic agent moiety which is bonded to a blocking moiety through a hetero atom, or a precursor thereof; R.sup.1 represents a hydrogen atom or a substituent group; and Z represents atoms necessary to form a carboxylic ring or a heterocyclic ring. The blocked photographic agent is completely stable upon storage of the photographic material, and releases a photographic agent at a desired time upon processing of the photographic material. The blocked photographic agent also exhibits its function to a substantial degree over a wide range.

Abstract: A light-sensitive material comprising a light-sensitive layer provided on a support wherein the light-sensitive layer contains silver halide, a reducing agent, a polymerizable compound, and an organic solvent which is miscible with the polymerizable compound and is contained in microcapsules.

Abstract: A silver halide photographic material, which contains at least one blocked photographic reagent having in the molecule thereof at least one group selected from ##STR1## group and capable of releasing a photographically useful reagent by cleavage of the --N--C--bond by a nucleophilic attack of a nucleophilic reagent on the carbonyl group and a subsequent intramolecular electron transfer reaction or intramolecular nucleophilic reaction and which has at least one photosensitive silver halide emulsion layer, is photographically processed in the presence of an amine. A photographic material which includes, in combination, a photographic reagent precursor capable of releasing a photographically useful reagent timely on photographic processing and a photosensitive silver halide emulsion layer is provided along with a method of processing the photographic material.

Abstract: A photographic silver halide photosensitive material is provided comprising a substantially water-insoluble basic metal compound and a water-soluble salt of the same metal ion as the basic metal compound which inhibits dissolution of the basic metal compound. An image is formed by combining the photosensitive material with a complexing compound in the presence of water and causing complexing reaction of the basic metal compound and the complexing compound to occur, increasing the pH of the system.

Abstract: A process for processing a silver halide color photographic material which comprises processing, after color development, a silver halide color photographic material with a processing solution having a bleaching faculty using an aminopolycarboxylic acid ferric complex salt as an oxidizing agent, said color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and at least one compound releasing by the reaction with an oxidation product of a developing agent a group releasing or forming development inhibitor by the reaction with another molecule of an oxidation product of a developing agent.

Abstract: Compounds of the formula I are suitable as thermal development and diffusion promoting agents for the heat development process. With the aid of said compounds higher color transfer densities can be achieved and/or the development time can be shortened. ##STR1## wherein X.sub.1 denotes --SO.sub.2 -- or--CO--;R.sup.1 to R.sup.4 denote alkyl, cycloalkyl, aralkyl or aryl;R.sup.5 and R.sup.6 denote acyl or a group as defined for R.sup.1 to R.sup.4 ; and R.sup.1 together with R.sup.5, R.sup.2 together with R.sup.6, R.sup.3 together with R.sup.4 and/or R.sup.1 together with R.sup.2 may in each case form a heterocyclic ring containing at least one nitrogen atom.

Abstract: A color image is formed by subjecting a silver halide photosensitive material comprising at least a photosensitive silver halide, a two equivalent coupler, a binder, and a substantially water-insoluble basic metal compound on a support, to development with a processing solution comprising a complexing compound capable of complexing reaction with the metal in ionic form of said substantially water-insoluble basic metal compound in the presence of water to release a base.

Abstract: A silver halide photographic material which contains at least one blocked photographic reagent having in the molecule thereof at least one ##STR1## structure and capable of releasing a photogrpahically useful reagent by cleavage of the ##STR2## bond by a nucleophilic attack of a nucleophilic reagent on the structure and a subsequent intramolecular electron transfer reaction or an intramolecular nucleophilic reaction and which has at least one photosensitive silver halide emulsion layer. There is provided a photogrphic material which includes, in combination, a photographic reagent precursor capable of releasing a photographically useful reagent timely on photographic processing and a photosensitive silver halide emulsion layer.

Abstract: The heat development process using an integral color photographic recording material carrying, on a preferably transparent layer support, both an image receptor layer and light-sensitive layers of binder with silver halide and associated dye releasing compounds, optionally with a light-reflecting layer of pigment between the image receptor layer and the light-sensitive layers, may be carried out as a one-step development process in which silver halide development and color transfer take place at the same time if an auxiliary sheet containing a thermal development and diffusion promoting substance in a layer of binder is used. The thermal development and diffusion promoting agent is preferably liquid under normal conditions and dispersed in a microencapsulated form in the layer of binder.

Abstract: There is described a photographic system wherein development of an exposed photosensitive element with an aqueous alkaline photographic developing composition is effected in the presence of a compound represented by the formula ##STR1## wherein R is --OH, --OR.sub.4, --NH.sub.2 --NHR.sub.5 or --NR.sub.4 R.sub.6 ; R.sub.1 is hydrogen, --NH.sub.2, alkyl, substituted alkyl, aryl or substituted aryl; R.sub.2 and R.sub.3 each independently is hydrogen, alkyl, aralkyl or aryl; R.sub.4 is a protecting group which can be removed in the presence of a base; R.sub.5 is an activating group which can render the neighboring hydrogen atom acidic; R.sub.6 is an electron withdrawing group which is capable of stabilizing the negative charge on the nitrogen atom which is produced upon removal of R.sub.4 upon contact with alkali; and PHOTO is a photographically useful group.

Abstract: Diffusion transfer color films and processes are disclosed which use dye developer chemistry to form at least one color record and which use image dye-releasing thiazolidine chemistry to form at least one of the other color records.

Abstract: Compounds corresponding to formula I are suitable for use as thermal development and diffusion promoting agents for the heat development process. The said compounds enable higher color transfer densities to be obtained and/or the development time to be reduced. ##STR1## wherein R.sup.1, R.sup.2 denote alkyl, cycloalkyl, aralkyl, aryl or acyl andZ denotes a group for completing a saturated heterocyclic ring containing 5 to 11 ring members.

Abstract: A method for processing a silver halide photographic light-sensitive material comprising a support having thereon a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent capable of releasing a photographically useful agent, which method comprises processing the photographic light-sensitive material in the presence of an oxime.According to this method for processing a silver halide photographic light-sensitive material, both stability of the photographic light-sensitive material during storage and release of a photographically useful agent during processing are achieved without undersirable side-reactions, and a high sensitivity/fog ratio is obtained.

Abstract: A silver halide photographic light-sensitive material containing, in at least one layer thereof, a compound capable of releasing a fogging agent upon an oxidation-reduction reaction with an oxidation product of a developing agent under an alkaline condition. The material has an increased sensitivity, an increased contrast and an accelerated development rate.

Abstract: A silver halide photographic material which comprises a support having coated thereon a light-sensitive silver halide emulsion layer, wherein the photographic material contains at least one blocked photographic agent represented by the following general formula (I): ##STR1## wherein A represents a photographic agent moiety which is bonded to a blocking moiety through a hetero atom, or a precursor thereof; R.sup.1, R.sup.2 and R.sup.3 each represents a hydrogen atom, or a substituent group; and Z represents atoms necessary to form a carbocyclic ring or a heterocyclic ring (except for a heterocyclic ring which contains an NH group at the position adjacent to the carbon atom to which R.sup.1 is attached). The blocked photographic agent is completely stable upon storage of the photographic material, and releases a photographic agent at a desired time upon processing. The blocked photographic agent also exhibits its function to a substantial degree over a wide range of pH.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer having associated therewith at least one blocked photographic reagent represented by formula (I) or (II); ##STR1## wherein, A represents a moiety of a photographic reagent or a moiety of a precursor of a photographic reagent bonded to the ring containing Z through a hetero atom; Y.sup.1, and Y.sup.2 and Y.sup.3 each represents a hydrogen atom or a substituent, or Y.sup.1 and Y.sup.3 in formula (I) together form a ring; Z represents an atomic group necessary for forming a carbon ring or a heterocyclic ring; and n represents 1 or 2.The silver halide photographic material is stable under storage conditions.

Abstract: A nonseparation monosheet integrated type color diffusion transfer photographic film unit is disclosed comprising(a) a light-sensitive element comprising a support having provided thereon in this order an image receiving layer, a white reflection layer and at least one silver halide emulsion layer associated with a dye providing compound capable of forming or releasing a diffusible dye as a result of development;(b) a cover sheet;(c) at least one neutralizing layer;(d) a container provided between the emulsion layer of the light-sensitive element and the cover sheet, containing an alkali processing composition which contains an aluminum compound.

Abstract: An internal latent image-type direct positive silver halide light-sensitive material is described, comprising a support having at least one photographic emulsion layer thereon, wherein said layer contains internal latent image-type direct positive silver halide grains, the surfaces of which are chemically sensitized, wherein a compound of the general formula (I) is added as a finish additive to the photographic emulsion layer or at least one hydrophilic colloid layer adjacent to the photographic emulsion layer.General Formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined as herein. The light-sensitive material exhibits a very satisfactory reversal performance and is greatly improved in stability over the course of time.

Abstract: A method of processing a photographic material which contains a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent capable of releasing a photographically useful agent by ring cleavage of a 4- to 7-membered ring containing at least one carbonyl group in the presence of a hydroxylamine, whereby both high stability of the photographic material upon storage and timely release of the photographically useful agent upon processing are achieved.

Abstract: A heat-developable photographic light-sensitive material is described, comprising a support having thereon, at least one layer containing a compound represented by the general formula (I) or (II) below: ##STR1## wherein R and R' each represents a group selected from a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, an amino group, an acylamino group, an alkoxy group, an alkylthio group, a sulfonylamino group, a heterocyclic ring group and a substituted group of them; X represents atoms forming a 5-membered or 6-membered ring; A represents a group causing a decarboxylation reaction.This heat-developable photographic light-sensitive material provides a high maximum density and low fog by heat-developing at a relatively low temperature and for a short time.

Abstract: A photosensitive material having a widened temperature lattitude. The photosensitive material is described, comprising a support having thereon at least one silver halide emulsion layer associated with a dye-providing compound capable of forming an imagewise mobile dye as the result of exposure and development, wherein a hydroquinone derivative and a water-insoluble but organic solvent-soluble homopolymer or copolymer having a recurring unit containing a ##STR1## bond in the main chain or side chain are integrated and dispersed as individual particles in a hydrophilic colloid of the silver halide emulsion layer or layers or the dye providing compound containing layer or layers.

Abstract: Photographic elements and assemblages are described which employ nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds which are capable of releasing photographically useful groups in an imagewise manner as a function of silver halide development.

Abstract: A silver halide photographic light-sensitive material is described, comprising a support having thereon a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent represented by formula (I) ##STR1## wherein A represents a photographically useful agent moiety, which may have a timing group; X.sup.1 and X.sup.2 each represents a carbonyl group, a sulfonyl group, or a sulfinyl group; Z represents an atomic group forming a 5-membered, 6-membered, or 7-membered ring; R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an acyl group, a sulfonyl group, or a heterocyclic group; R.sup.3 represents an alkyl group, an alkenyl group, a cycloalkyl group, a heterocyclic group, an aryl group, or an aralkyl group; m represents 0, 1, or 2; n represents 0 or 1; and the total of m+n is 1, 2, or 3.

Abstract: A direct positive silver halide photographic material is described, comprising a support having thereon at least an internal latent image-type direct positive silver halide emulsion layer containing a hydrazine series nucleating agent, wherein said silver halide emulsion layer or a layer adjacent to the silver halide emulsion layer contains a non-dye image-forming compound represented by following general formula (I) in an amount sufficient for accelerating nucleation; ##STR1## wherein Z.sub.1 and Z.sub.2, which may be the same or different, each represents an atomic group necessary for forming a benzene ring or a naphthalene ring; G.sub.1 and G.sub.2, which may be the same or different, each represents hydrogen or a substituent which does not adversely influence the image; A.sub.1, A.sub.2 and A.sub.3, which may be the same or different, each represents hydrogen or a substituent which does not adversely influence the image; B.sub.1, B.sub.2 and B.sub.

Abstract: Photographic elements and assemblages are described which employ nondiffusible compounds which release photographically useful groups in an imagewise manner as the result of a .beta.-elimination reaction.

Abstract: A process for forming an image which comprises heating a light-sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder and a dye releasing redox compound which is reductive to the light-sensitive silver halide and capable of releasing a hydrophilic dye upon reaction with the light-sensitive silver halide by heating, after imagewise exposure or simultaneously with imagewise exposure, in a substantially water-free condition in the presence of a compound represented by the formula (A): ##STR1## wherein R.sup.1 represents a hydrogen atom or a monovalent or divalent aliphatic group; R.sup.2 and R.sup.3, which may be the same or different from each other, each represents a hydrogen atom, an aliphatic group or an aromatic group; R.sup.1 and R.sup.2 may be taken together to form a heterocyclic ring; R.sup.2 and R.sup.3 may be taken together to form a heterocyclic ring; and n represents 1 or 2, to imagewise form a mobile dye is disclosed.

Abstract: Benzoxazole derivatives represented by general formula (I) which are intermediates for synthesis of o-sulfonamidophenol derivatives useful as dye releasing redox compounds in a color diffusion transfer color image forming process: ##STR1## wherein R.sup.1 and R.sup.2, which may be the same as or different from each other, each represents an alkyl group or an aryl group or they may combine and form a ring; R.sup.3 represents a hydrogen atom, an alkyl group or an aryl group; R.sup.4 represents an alkyl group or an aryl group; R.sup.5 represents an alkyl group, an alkoxy group, an alkylthio group, an arylthio group, a halogen atom or an acylamino group, or --CR.sup.1 R.sup.2 R.sup.3 and R.sup.5 may combine and form the nucleus ##STR2## which is condensed at the 6- and the 7-positions of the benzoxazole nucleus; and n is 0, 1 or 2.

Abstract: A silver halide photographic light-sensitive material is described, comprising a support having provided thereon at least one light-sensitive silver halide emulsion layer associated with a substantially immobile, positive one-equivalent redox compound capable of releasing a photographically useful compound or a precursor thereof as a result of a redox reaction, said compound being represented by formula (I) ##STR1## wherein Acp represents an anion center precursor capable of causing --Z--Q to be released by a quinonemethide type releasing reaction when being reduced R.sup.1 and R.sup.

Abstract: A heat developable color photographic light-sensitive material is described, comprising(1) a light-sensitive silver halide,(2) a hydrophilic binder,(3) a dye releasing compound having an ability to reduce exposed light-sensitive silver halide and capable of reacting with the exposed silver halide upon heating, thereby releasing a mobile dye, and(4) a sulfonamide compound represented by the formulaR.sub.0 --SO.sub.2 NH.sub.2wherein R.sub.0 represents an alkyl group, an alkenyl group, an alkynyl group containing at least 4 carbon atoms, an aralkyl group, an aryl group or a heterocyclic ring group, provided that the heterocyclic ring group is linked to --SO.sub.2 NH.sub.2 through a carbon atom contained in the ring thereof.

Abstract: There is described a photographic system wherein development of an exposed photosensitive element with an aqueous alkaline photographic developing composition is effected in the presence of a compound which releases a quaternary in alkaline environment. Photographic products and processes utilizing such compounds are also disclosed.

Abstract: A photographic light-sensitive material is described, comprising a support having thereon at least one combination of a silver halide photographic emulsion layer and associated therewith a dye-providing compound capable of imagewise forming a mobile dye as a result of imagewise light exposure and photographic development, said silver halide photographic emulsion layer or a layer containing said dye-providing compound having dispersed, in a hydrophilic colloid, a water-insoluble and organic solvent-soluble homopolymer or copolymer having as the main chain or a side chain thereof a repeating unit including a ##STR1## bond and a redox compound represented by formula (I) as combined paticles; ##STR2## wherein R represents a hydrogen atom; a substituted or unsubstituted alkyl group, aryl group, acylamino group, alkoxy group, aryloxy group, alkylthio group, arylthio group, carbamoyl group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, sulfamoyl group, alkylsulfonyl group, or arylsulfonyl group; a halogen

Abstract: A color diffusion transfer photographic element which comprises a support having provided thereon at least one silver halide emulsion layer containing a non-diffusible redox compound capable of releasing a diffusible dye or a precursor thereof by processing with an alkaline processing solution containing 3-pyrazolidinone type developing agent in the presence of a silver halide developing agent after exposure to light, wherein said alkaline processing solution is subjected to a heat treatment before use under a substantially oxygen-free condition for at least T days, wherein T is represented by the formula ##EQU1## wherein X represents the maximum temperature at which the heated alkaline processing solution is held, provided that X is about 40.degree. C. or more.

Abstract: A color diffusion photographic film unit comprising (a) a light sensitive element comprising at least one photosensitive silver halide emulsion layer associated with a redox compound adapted to release a diffusible dye, (b) an image receiving element, and (c) an alkaline processing composition element, wherein a 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent of the following general formula (I) or a precursor thereof is incorporated in at least one of said elements (a) through (c) ##STR1## wherein R.sub.1 is methyl or ethyl and R.sub.2 is hydrogen or a group cleavable under alkaline conditions is disclosed.

Abstract: A heat-developable light-sensitive material comprising a support having there on a light-sensitive silver halide, a binder and a dye releasing compound which is capable of reducing the light-sensitive silver halide and reacting with the light-sensitive silver halide by heating to release a dye, said dye releasing compound is changed so as to have shorter absorption wavelength. The heat-developable light-sensitive material has high sensitivity and can be developed without supplying water from the outside.

Abstract: Photographic assemblages are described employing metallizable redox dye-releasers and a ligand having a coordinating site which is: ##STR1## In a preferred embodiment, the ligand is an alpha amino carboxylic acid, a 2-pyridinecarboxylic acid, a 2-aminoalcohol, a 2-hydroxymethylpyridine, a 2-hydroxyacetic acid, a 1,2-diamine or a 2-hydroxypyridine-N-oxide.