Abstract: A diazo heat-sensitive recording material having excellent raw stock storability and image storage characteristics, which comprises a support having thereon a recording layer comprising a diazo compound, a coupling component and an organic base. The diazo compound is a 4-disubstituted amino-2-alkoxybenzenediazonium salt and the coupling component is a compound represented by the following general formula: ##STR1## wherein R.sub.4, R.sub.5, R.sub.6 and R.sub.7 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, an alkoxycarbonyl group, an acyloxy group, a carbamoyl group, a sulfamoyl group, a halogen atom, a cyano group or a nitro group.

Abstract: A multi-color heat-sensitive recording material is disclosed which comprises a support having laminated thereon in the following order a first heat-sensitive color forming layer comprising mainly an electron donating dye precursor and an electron accepting compound, a second heat-sensitive color forming layer containing a diazonium salt compound having a maximum absorption wavelength of 360.+-.20 nm and a coupler capable of reacting with the diazonium salt compound by heating to form color and a third heat-sensitive color forming layer containing a diazonium salt compound represented by formula (I) having a maximum absorption wavelength of 400.+-.20 nm and a coupler represented by formula (II) capable of reacting with the diazonium salt compound by heating to form color: ##STR1## wherein R.sub.1 and R.sub.2 each represents an alkyl group, an aralkyl group or an aryl group; Y represents a halogen atom, an acyl group, an alkoxycarbonyl group or a sulfamoyl group; and X.sub.1.sup.

Abstract: A silver halide photographic light-sensitive material which provides an improved safelight property without adversely affecting the photographic properties of the light-sensitive material. The silver halide photographic light-sensitive material contains at least one compound represented by formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a substitutable group; W represents a nitrogen atom or a carbon atom; Z represents --Y.sub.1 --(R.sub.3)n.sub.2 or R.sub.3 in which R.sub.3 represents a hydrogen atom or a substitutable group; n.sub.0, n.sub.1 and n.sub.2 each represents 0 or 1; h represents 1 or 2; R.sub.1 and R.sub.2 and R.sub.3 may combine with each other to form a hydrocarbon ring or a heterocyclic ring; Y.sub.1 represents --CO--, --CO(.dbd.NR.sub.4)--, --C(.dbd.S)--, --C(.dbd.N.sup.+ R.sub.5 R.sub.6)--, --SO--, --SO.sub.2 --, --C(C.dbd.CR.sub.7 R.sub.8)--,--R.sub.6 C.dbd.N--, or --R.sub.6 C.dbd.CR.sub.9 --in [(R.sub.1).sub.n1 --Y.sub.1 ] when n.sub.1 is 1 and in --Y.

Abstract: A novel silver halide photographic material is provided comprising on a support at least one silver halide emulsion layer, wherein the emulsion layer or other hydrophilic colloidal layers comprise at least one compound represented by ty the general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or a substituent; W represents a carbon atom or a nitrogen atom; Z represents --Y.sub.1 (R.sub.3).sub.n0 or R.sub.3 (in which R.sub.3 represents a hydrogen atom or a substituent); n.sub.0 and n.sub.1 each represents an integer O or 1; 1 represents an integer 1 or 2; R.sub.1, R.sub.2 and R.sub.3 may be connected to each other to form a carbon ring or a heterocyclic group; Y.sub.1 represents ##STR2## (in which R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 each represents a hydrogen atom or a substituent) when n.sub.1 is 1 or represents a cyano group or a nitro group when n.sub.1 is 0; X represents --SO.sub.2 -- or --SO.sub.3 --; and D represents a photographic dye portion.

Abstract: A novel silver halide photographic material is provided comprising at least one silver halide emulsion layer on a support, wherein the emulsion layer or other hydrophilic colloidal layers comprise at least one compound represented by formula (I): ##STR1## wherein W represents .dbd.N-- or ##STR2## in which R.sub.1 represents a hydrogen atom or a substituent; R.sub.0 represents an alkyl group containing 10 or more carbon atoms or an aromatic group containing 12 or more carbon atoms; Z represents an atomic group which can form a heterocyclic group or a carbon ring; Y represents ##STR3## wherein R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 each represents a hydrogen atom or a substituent; X.sub.1 represents a divalent group connected to carbon atom via a hetero atom contained therein; D represents a photogragraphic dye portion connected to X.sub.1 via a hetero atom contained therein; A represents a water-solubilizing group; m.sub.1 represents an integer 0 or 1; and n represents an integer 2 or more.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, characterized in that at least one silver halide emulsion layer contains at least one compound represented by the following general formula (I), (II) or (III): ##STR1## wherein Q, X, Y, Z.sub.1, Z.sub.2, A, T.sub.1, T.sub.2 and T.sub.3 are as defined in the specification.

Abstract: A silver halide color photographic material is disclosed, comprising a support having thereon at least one silver halide emulsion layer, which contains at least one compound represented by formula (I) in the silver halide emulsion layer or in a light-insensitive hydrophilic colloid layer: ##STR1## wherein X represents a divalent linking group connected to the carbon atom through a hetero atom in X;Z represents a bleach accelerating agent moiety connected to X through a hetero atom in Z;W represents .dbd.N-- or ##STR2## (wherein Y represents a hydrogen atom or another substituent); A represents an atomic group necessary to form an aromatic heterocyclic ring containing 3 or more hetero atoms, provided that when W represents ##STR3## the group adjacent to W is a group except for ##STR4## (wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.

Abstract: A silver halide photographic material comprising one or more silver halide emulsion layers and hydrophilic colloid layers, wherein at least one of the layers contains an acylhydrazine compound as described below. The instant photographic materials have high contrast negative-gradation or positive-gradation characteristics, high maximum image density, excellent reversal characteristics and long-term storage stability.

Abstract: A silver halide color photographic material is described, comprising a support having thereon at least one of a silver halide emulsion layer and other hydrophilic colloid layer, wherein the silver halide emulsion layer or a hydrophilic colloid layer contains at least one compound represented by formula (II): ##STR1## wherein R.sub.2 represents a hydrogen atom or a group that can be substituted, Y.sub.1 represents ##STR2## R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8, which may be the same or different, each represents a hydrogen atom or a group that can be substituted; X.sub.1 represents a divalent linking group containing a hetero atom connected to the carbon atom; m is 0 or 1; A represents a bleach accelerating agent moiety represented by ##STR3## wherein R.sub.9, L, X.sub.2 R.sub.10 B, l.sub.1 and L.sub.2 are defined in the specification.The compound represented by formula (II) is a bleach accelerating agent having an active group of adsorptive group.

Abstract: A method for processing a silver halide color photographic material is described, comprising a support having thereon at least one of a silver halide emulsion layer and other hydrophilic colloid layer, wherein the silver halide emulsion layer or other hydrophilic colloid layer contains at least one compound represented by formula (I):A--B (I)wherein A represents a blocking group capable of being cleaved from B during processing and B represents a bleach accelerating agent containing at least one hetero atom linked to A through the hetero atom, wherein said method comprises at least one color developing step and desilvering step comprising a bleach-fixing treatment.

Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide light-sensitive emulsion layer, wherein at least one compound represented by the formula (I) is present in said silver halide emulsion layer or at least one other hydrophilic colloid layer of said material:A--B (I)wherein A represents a blocking group which can release a dye for photographic purposes during processing and B represents said dye for photographic purposes which is bonded to A by means of a hetero atom.