Abstract: A 6-substituted-2,4-bis(trichloromethyl)-s-triazine stabilizer precursor which has a maximum absorption wavelength greater than 320 nanometers and is thermally stable at temperatures up to 150.degree. C. provides improved post-processing stability in a photothermographic silver halide material designed for dry physical development. Such a photothermographic material comprises photographic silver halide and an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent. A developed visible image is provided after imagewise exposure by uniformly heating the photothermographic material to moderately elevated temperatures.

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: Photographic silver halide emulsions show increased speed and reduced latent image fading when a compound of the following structure is incorporated: ##STR1## wherein: X is --O--, --S--, --Se--, or ##STR2## Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus or together represent the atoms completing a fused aromatic nucleus;Z is ##STR3## R is hydrogen or lower alkyl of from 1 to 5 carbon atoms; and R.sup.1 is hydrogen or methyl.

Abstract: A heat-development-type image recording material comprising an organic silver salt, a reducing agent, a binder, and an amido derivative of a 5-mercapto-1,2,4-triazole or a 5-mercapto-1,3,4-thiadiazole.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material contains at least one member of the compounds represented by the general formula: ##STR1## (wherein the symbols are the same as described in the appended claims). In this silver halide photographic light-sensitive material, variations in photographic performance are prevented during the storage thereof and, further, the occurrence of fog is prevented without causing a reduction in sensitivity.

Abstract: Silver halide emulsions lack stability in that their properties vary over a period of time. Various stabilizers have been used to reduce the rate and degree of variation. The combination of uracils and nitroso-substituted phenols has been found to provide a synergistic stabilization of speed in silver halide emulsions. Other stabilizers may be combined with those two classes to further improve the stability of the emulsion.

Abstract: The light-sensitive color photographic silver halide recording material contains in at least one of its light-sensitive gelatine-containing layer, color formers for the formation of the image dyes in the three primary colors, a crosslinking agent activating the carboxyl groups of gelatine selected from carbamoylonium salts, carbamoylpyridinium salts and carbamoyloxypyridinium salts and a compound acting as aldehyde-scavenger which corresponds to the general formula ##STR1## wherein Z represents the atoms required for completing a 5-6-membered substituted or unsubstituted carbocyclic ring or a substituted or unsubstituted heterocyclic ring which may contain oxygen, nitrogen or sulfur as hetero-atom.

Abstract: Substituted benzothiazolines are used as antifoggants in high speed silver halide emulsions.

Abstract: There is disclosed a silver halide photographic photosensitive material which contains in at least one of silver halide emulsion layers and colloid layers permeable to water through to or out from said emulsion layer at least one compound represented by the following general formula (I): ##STR1## wherein A, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same as defined previously. This photosensitive material has stability against over-development fogging.

Abstract: Compounds corresponding to the following general formula ##STR1## wherein R.sup.1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocyclic group or one of the following groups: --CO--alkyl, --CO--aryl, --CO--heterocyclic group, --SO.sub.2 --alkyl, --SO.sub.2 --aryl, --CO--O--alkyl, --CO--NH--NH.sub.2, ##STR2## and R.sup.2 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, alkoxy, aroxy, carboxyl, carbamoyl, alkoxycarbonyl, an alkyl or aryl group attached through a carbonyl group, cyanogen, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl, or a cyclic amino groupmay be used as additives in the layers of color photographic recording materials to improve the stability of color couplers, in particular magenta couplers, against formaldehyde.

Abstract: Compounds of the formula ##STR1## are suitable for the stabilization of the latent image in silver halide photographic materials.

Abstract: New triazoles of the formula ##STR1## are suitable stabilizing agents in photographic materials.

Abstract: A novel dry image forming material comprising in one or more layers on a support (a) a non-photosensitive organic silver salt oxidizing agent, (b) a reducing agent for silver ions, (c) a silver halide component or a silver halide-forming component, (d) a toning agent and (e) a lipophilic binder, characterized by the inclusion of a specific 2-(2'-hydroxyphenyl)benzotriazole compound having bulky tert-butyl or tert-amyl groups at its ortho- and para-positions relative to the hydroxyl group in a layer containing the component (a). The dry image forming material of the present invention has high storage stability prior to use for image formation.

Abstract: Photographic silver halide emulsions show increased speed and reduced latent image fading when a compound of the following structure is incorporated: ##STR1## wherein: X is -O-, -S-, -Se-, or ##STR2## Y represents the atoms completing a fused aromatic nucleus; Z is ##STR3## R is hydrogen or lower alkyl of from 1 to 5 carbon atoms.

Abstract: Pyrazoles of the formula ##STR1## are useful as stabilisers in photographic materials.

Abstract: A black-and-white negative image forming process is disclosed using a diffusion transfer type film unit. An exposed silver halide emulsion comprising internal latent image type silver halide grains which have substantially no fogging centers at their surface is processed with a composition comprising a silver halide solvent, a developing agent, a foggant, alkali and a fog promoting agent. The solvent for the silver halide characteristically possesses a solubilizing power for AgBr of from about 2.times.10.sup.-5 to 5.times.10.sup.-3 mol/l in a 0.002 molar aqueous solution.

Abstract: Photothermographic emulsions may be stabilized against latent image fade and/or may have their speed increased by the addition of diazepines and fused aromatic diazepines.

Abstract: A heat developable silver image forming material comprising:(a) an organic silver salt oxidizing agent;(b) a compound or a composition capable of forming a photosensitive silver compound by reaction with the organic silver salt oxidizing agent (a);(c) a reducing agent for silver ion; and(d) a compound having a unit of ##STR1##

Abstract: Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.

Abstract: In a silver halide photographic material, at least one mercapto complexing agent for silver salt is contained in at least one photographic constituting layer and at least one anion or betaine type cyanine sensitizing dye is contained in silver halide emulsion layer to improve photographic defects such as reduction of sensitivity, softening in tone, etc.

Abstract: A silver halide photographic light-sensitive element is described containing a cephalosporin compound in its silver halide emulsion layer of substantially the surface latent image type, or in its hydrophilic colloid layer. This light-sensitive element is prevented in the latent image fading.

Abstract: A silver halide photographic light-sensitive material is described containing a compound comprising at least one unsaturated group and at least one betaine group in at least one layer thereof.The photographic light-sensitive material has a high sensitivity without being accompanied by an undesirable increase in the formation of fog.

Abstract: A light-sensitive silver halide photographic material comprising a combination of a salt of tetrazolium containing only a non-metallic anion and a salt of tetrazolium containing a metallic anion.

Abstract: Photosensitive silver halide emulsions for use in diffusion transfer processes are stabilized without adversely affecting spectral sensitization by the following steps: (a) spectrally sensitizing the silver halide grains; (b) lowering the pH of the emulsion from a first pH of the emulsion subsequent to chemical ripening to a pH of about 5.5 to 4.0 and/or increasing the Br ion/Ag ratio to at least 5 mg Br ion/gAg and, subsequent to steps (a) and (b), (c) adding 5-80 mg/gAg to said emulsion of a stabilizer selected from the group consisting of an hydroxy triazaindene, an amino triazaindene, an hydroxy tetrazaindene, an amino tetrazaindene, an hydroxy pentazaindene and an amino pentazaindene.

Abstract: A photographic material with at least one light-sensitive silver halide emulsion is disclosed. The emulsion has been prepared by carrying out the precipitation of the silver halide in the presence of certain imidazoles.

Abstract: A photographic material comprising a support and at least one silver halide emulsion layer coated thereon, which material comprises a compound represented by the following general formula [I]: ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituted or unsubstituted aryl group, R.sup.2 and R.sup.3 individually represents a hydrogen atom, an alkyl group, alkenyl group, a substituted or unsubstituted aryl group, or R.sup.2 and R.sup.3 represent nonmetal atoms necessary for forming by their mutual linkage a 5- or 6-membered ring, and R.sup.4 represents a hydrogen atom, an alkyl group, alkenyl group, a substituted or unsubstituted aryl group or a group of the general formula ##STR2## wherein X represents the group --(CH.sub.2).sub.n -- wherein n is an integer from 0 to 4, or an allylene group.

Abstract: Propyne compounds, which are capable of stabilizing photographic materials against fog, color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.

Abstract: A silver halide photographic light-sensitive material having at least one silver halide photographic emulsion layer comprising substantially surface latent image type silver halide grains, and containing in said photographic emulsion layer or at least one of other hydrophilic colloid layers a compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom, an aliphatic group which may be substituted or an aromatic group which may be substituted; Ar represents a divalent aromatic group which may be substituted; Y represents a divalent linking group; n represents 0 or 1; R.sup.2 represents a hydrogen atom, an aliphatic group which may be substituted or an aromatic group which may be substituted; and Z represents a nonmetallic atomic group necessary to form a 5-membered or 6-membered heterocyclic ring together with the ##STR2## linkage.

Abstract: A color photographic material comprising, on a support, a silver halide emulsion layer which contains a 2-equivalent .alpha.-acylacetamide yellow coupler carrying a nitrogen-containing heterocyclic coupling off group, joined to a nitrogen atom, as being releasable upon the reaction with an oxidation product of a color developing agent and a compound of the following formula (I) or its tautomer: ##STR1## wherein X and Y are as herein defined, is described.

Abstract: Propyne compounds, which are capable of stabilizing photographic materials against color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.

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: A heat developable photosensitive composition comprises an organic silver salt, a halide and a sulfur compound.

Abstract: A light-sensitive silver halide reproduction material of high gradation stability which contains a disulfide compound substituted by two heterocyclic radicals, and a thiazolidine compound.

Abstract: Light-sensitive silver halide photographic materials to be treated with a hydroquinones-containing developing solution which material comprises a support and at least one hydrophilic colloidal layer coated thereon containing silver halide grains having an average grain size of 0.05 to 1.5.mu. and a tetrazolium compound and a method of processing thereof.

Abstract: A photographic material having a light-sensitive silver halide emulsion layer containing a mixture of monomethinecyanine dyes is disclosed. The mixture is particularly suitable for minimizing fog in the finished product.

Abstract: A method for preventing the degradation of a hydrophilic colloid solution for a silver halide photographic light-sensitive material of which the viscosity has been or is to be increased using an anionic polymer containing an acid group, which comprises incorporating into the hydrophilic colloid solution at least one compound represented by the formula (I): ##STR1## wherein R.sub. represents a hydrogen atom or an alkyl group; and R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group.

Abstract: A light-sensitive silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, with the silver halide photographic material containing at least one compound represented by the following general formula (I): ##STR1## wherein Z represents the atoms necessary to complete an oxazolidine ring, a pyrrolidine ring or a thiazolidine ring; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group or an aryl group; R.sup.3 represents a --COR.sup.4 group or a --CO.sub.2 R.sup.5 group; R.sup.4 represents an alkyl group or an aryl group; R.sup.5 represents a hydrogen atom, an alkyl group or an aryl group; and n is 1 or 2, and when n is 2, at least one of R.sup.1, R.sup.4 and R.sup.

Abstract: Photographic silver halide emulsions show increased speed and reduced latent image fading when a compound of the following structure is incorporated: ##STR1## wherein: X is --O--, --S--, --Se--, or ##STR2## Y represents the atoms completing a fused aromatic nucleus; Z is ##STR3## and R is hydrogen or lower alkyl of from 1 to 5 carbon atoms.

Abstract: Propyne compounds, which are capable of stabilizing photographic materials against color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.