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 silver halide color photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer and a compound represented by the following general formula (I): ##STR1## wherein COUP represents a coupler residue capable of being subjected to a coupling reaction with an oxidation product of an aromatic primary amine developing agent; TIME represents a timing group which is released upon the coupling reaction and subsequently releases ##STR2## Z represents a monocyclic or condensed heterocyclic ring consisting of a nitrogen atom and a carbon atom; L represents a divalent linking group; R.sup.1 represents a hydrogen atom or an alkoxycarbonyl group; R.sup.2 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, an alkoxycarbonyl group, a carbamoyl group, a sulfamoyl group, a thioacyl group or a thiocarbamoyl group; R.sup.3 represents a hydrogen atom; R.sup.2 and R.sup.

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 silver halide photographic light-sensitive material is described which comprises a support having thereon a light-sensitive silver halide emulsion layer, wherein the photographic light-sensitive material therein contains a blocked photographic agent capable of releasing a photographically useful agent and the blocked photographic agent has a carbonyl group or thiocarbonyl group to which a hydrogen atom or a carbon atom is directly bonded and is substituted with a photographically useful group which is capable of being released upon an intramolecular nucleophilic attack by the oxygen atom in the carbonyl group or the sulfur atom in the thiocarbonyl group.The precursor of photographic agent is completely stable during storage prior to use of the photographic light-sensitive material, and releases a photographic agent at a desired time upon the processing of the photographic light-sensitive material. The precursor also exhibits its function to a substantial degree in a relatively low pH range.

Abstract: A photographic silver halide light-sensitive material is described. The material includes at least one of the compounds represented by general formula (I) as described below, their salts, and their precursors releasing the compounds of general formula (I) on cleavage under alkali conditions. ##STR1## (the symbols are as defined in the appended claims). This light-sensitive material is less subject to a variation in photographic performance during the storage, in particular, the formation of fog is prevented.

Abstract: Direct positive silver halide photographic light-sensitive materials are described in which at least one layer of light-sensitive silver halide photographic emulsion layers and other hydrophilic colloid layers applied on a base contains a mercapto compound represented by the following general formula (I) or (II) as a nucleating agent: ##STR1## wherein Z, L.sub.1, L.sub.2, L.sub.3, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and m are as defined in the specification. The nucleating agents can also be added to processing solutions.

Abstract: A heat-developable photographic material comprising (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) at least one compound selected from the compound represented by the general formula (I) described below and the compound represented by the general formula (II) described below. ##STR1## wherein X represents a halogen atom; and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an acyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an aralkylsulfonyl group or a heterocyclic residue, ##STR2## wherein X represents a halogen atom; Z represents a sulfur atom, an oxygen atom or >N--R.sub.1 (wherein R.sub.1 represents an alkyl group, an aryl group or an acyl group; (R')n represents a substituent present on the benzene nucleus; and n represents 0 or an integer from 1 to 4.

Abstract: A silver halide color photographic light-sensitive material containing a coupler having at least one of a sulfamoylphenylenesulfonyl group, a sulfamoylaminophenylenesulfonyl group and a sulfonamidophenylenesulfonyl group as a substituent. Preferred couplers are represented by the formula: ##STR1## wherein all moieties are defined in the specification wherein Cp is a coupler residue, L is a divalent linking group and X represents --NHSO.sub.2 --, ##STR2## or --SO.sub.2 NH, and n represents 0-4. Groups R.sup.1, R.sup.2 and R.sup.3 are defined in the specification.

Abstract: A photographic silver halide light-sensitive material is disclosed. The material is comprised of a support and a photographic layer or layers on the support. The photographic layer contains at least one of the compounds represented by the general formula: A--OCH.sub.2 --Z (wherein A is a group capable of undergoing cleavage on application of alkali hydrolysis, and Z is a photographically useful group containing a nitrogen atom through which it is linked to the group A--OCH.sub.2 --). The compounds, i.e., photographically useful group precursors, as used herein are stable during the storage of the raw film and can release the photographically useful group at a controlled speed during development.

Abstract: An improved method for bleaching color photosensitive materials with a persulfate is provided. This method is free of offensive odors, can bleach efficiently color photosensitive materials containing a large amount of silver by using a persulfate, and can effectively bleach color photosensitive materials having colloidal silver layers by using a persulfate. The color photosensitive material used in the present invention contains at least one of the compounds represented by the formula I, salts thereof and precursors thereof: ##STR1## where R.sup.1 and R.sup.2 each independently represents a hydrogen atom, or an aliphatic residue and R.sup.1 and R.sup.2 may form a ring together with the N atom; R.sup.3 represents --R.sup.4 -- or --R.sup.4 --S, said --R.sup.4 -- being a divalent aliphatic residue; and X represents a divalent heterocyclic ring residue containing at least one atom selected from the group consisting of a nitrogen atom, an oxygen atom, and a sulfur atom.

Abstract: A method for processing an exposed silver halide color photographic material by development and desilvering is described, which comprises the steps of (1) treating said material in a color developing bath, (2) treating the developed material in a bath having incorporated therein at least one compound of formula (I) or a salt thereof: ##STR1## and (3) treating said material in a bath having bleaching or bleach-fixing ability.

Abstract: A silver halide photographic light-sensitive material which comprises a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent, said blocked photographic agent being represented by the following general formula (I): ##STR1## wherein A represents a photographic agent moiety which is attached to a blocking moiety through a hetero atom; Z represents a divalent linkage group; p represents 0 or 1; X and Y each represents a substituent: m represents an integer of 0 to 4: and n represents an integer of 0 to 5.

Abstract: A process for stabilizing a silver image is disclosed. The process is utilized in connection with a photographic material which is comprised of a water impermeable support having one or more light-sensitive silver halide emulsion layers thereon. After the photographic material is exposed and developed it is subjected to further processing by conventional means. However, within the further processing an aqueous solution is utilized which includes any compounds represented by the general formula (I), (II) or (III) as defined within the specification. The compound(s) represented by the general formula is/are generally present within the processing solution in a total amount of about 0.1 to 10 g/l of processing solution. By utilizing the aqueous solution containing the compound represented by the general formula within the processing, it is possible to greatly increase the stability of the silver image formed.

Abstract: A silver halide photographic light-sensitive material containing at least one compound represented by the general formula (I): ##STR1## is disclosed. The compound of the invention has good stability over time. The material has improved developability and makes it possible to carry out simple and rapid processing. The material has good resistance with respect to fogging, stains and desensitization.

Abstract: A heat-developable photographic material is disclosed. The material is comprised of (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) at least one compound selected from the group consisting of 2-trihalogenomethyl-3,4-oxadiazoles and the derivatives thereof as an antifogging agent. The use of component (e) does not present environmental pollution problems and successfully reduces fog density.

Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one compound represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, an alkoxyalkyl group having from 2 to 10 carbon atoms or an alkylsulfonamidoalkyl group having from 2 to 10 carbon atoms; R.sup.3 represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or an alkoxy group having from 1 to 5 carbon atoms; X represents a hydrogen atom or a group capable of being removed with alkali; Y represents ##STR2## and Z represents an alkyl group, an alkenyl group, an aryl group or a heterocyclic group.

Abstract: A heat-developable photosensitive material is disclosed having a high image sharpness. The material is comprised of a heat-developable photosensitive layer which includes an organic silver salt, a photocatalyst, and a reducing agent. An antihalation layer is provided on the opposite face of the material with respect to the side intended for imagewise exposure. The antihalation layer contains a photosensitive halogen-containing compound which reduces the pH of the antihalation layer by photolysis and is colored with a dye which causes a change of color when the pH of the antihalation layer is reduced.

Abstract: A process for development-processing a silver halide black-and-white photographic light-sensitive material without silver stain and fog by the use of a developing solution which contains 0.1 mole/l or more of sulfite and at least one compound represented by the following general formula (I) or (II) ##STR1## wherein M represents a hydrogen atom, an alkali metal atom or an ammonium group; R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; n represents an integer of 1 to 8; and X represents a sulfonic acid group, a sulfonate group, a carboxylic acid group or a carboxylate group.

Abstract: A heat-developable photosensitive material is described comprising a heat-developable photosensitive layer containing at least an organic silver salt, a photocatalyst, and a reducing agent, wherein the improvement is an antihalation layer comprising a light bleachable colored composition composed of at least (1) a photosensitive halogen-containing compound, and (2) a merocyanine dye, provided on the opposite side of said heat-developable photosensitive layer with respect to the side intended for imagewise exposure.

Abstract: A two-equivalent cyan dye forming coupler represented by the general formula (I) substituted with at least one substituent represented by general formula (II), having substituents as defined in the specification. This coupler has excellent color forming properties and good dispersibility as well as good color hue and excellent fastness to heat and light. The color photographic material containing the two-equivalent cyan dye forming couplers does not exhibit a decrease in color density of cyan color images even when it is processed with a bleaching solution which has a weak oxidation power or a bleaching solution which is exhausted.