Abstract: A photographic material is described, comprising a support and at least one silver halide emulsion layer which contains nearly uniform and large size silver halide grains formed in the presence of a novel silver halide solvent represented by formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each represents an unsubstituted or substituted alkyl group, alkenyl group, cycloalkyl group, aralkyl group, aryl group, or heterocyclic group; R.sup.3 represents an unsubstituted or substituted alkyl group, alkenyl group, cycloalkyl group, aralkyl group, aryl group, --NR.sup.4 R.sup.5, a heterocyclic group; and R.sup.4 and R.sup.5 each represents a hydrogen atom, an alkyl group or an aryl group; and wherein R.sup.1 and R.sup.2 or R.sup.2 and R.sup.3 can combine with each other to form a 5- or 6-membered ring.

Abstract: A silver halide photographic light-sensitive material is described, comprising at least one light-sensitive silver halide emulsion layer on a support, wherein the emulsion in said light-sensitive silver halide emulsion layer comprises a silver iodobromide emulsion containing 3 mol % or more of iodide, and at least one of said light-sensitive emulsion layer or another hydrophilic colloid layer contains a polyoxyethylene type surface active agent and at least one of said light-sensitive emulsion layer or another hydrophilic colloid layer contains a meso-ionic triazolium compound represented by formula (I) ##STR1## wherein X represents a sulfur ion or --N--R.sup.4, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represents a hydrogen atom or a substituted or nonsubstituted alkyl group, aryl group, or heterocyclic group, or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 can together form a heterocyclic ring.

Abstract: A silver halide photographic material containing at least one of compounds represented by formula (I) and salts thereof in at least one hydrophilic colloidal layer of the silver halide photographic material gives photographic images having stable and excellent quality without being accompanied by the increased formation of fog and increased changes of sensitivity and gradation upon high temperature processing: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic ring group; or one or both of said R.sub.1 and R.sub.2 and said R.sub.3 and R.sub.4 combine with each other to form a ring.

Abstract: A method of developing silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally-fogged silver halide emulsion, in which the internally-fogged emulsion has internal fogging nuclei at a depth of 0.02.mu. or more below the surface of the grains is disclosed. The photographic material is developed in the presence of at least one compound selected from the group consisting of tetraazaindenes containing at least one mercapto group, purines containing at least one mercapto group, triazaindenes containing at least one mercapto group and pentaazaindenes containing at least one mercapto group, to increase photographic speed, contrast and maximum density as well as remove uneven stain.

Abstract: A color diffusion transfer photographic light-sensitive material comprising a support, at least one silver halide layer on the support, said emulsion layer being associated with a dye-providing compound, and an image-receiving layer on the same support as above or on another support, wherein said photographic light-sensitive material is able to provide a transferred dye image composed of a diffusible dye or its precursor released or derived from the dye-providing compound as a result of development under a strong alkaline condition in the presence of at least one meso ionic 1,2,4-triazolium-3-thiolate compound. In the present material, fog can be prevented efficiently without causing the problems of a reduction in sensitivity and a decrease in rate of development.

Abstract: A silver halide light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer is disclosed. The emulsion layer contains a silver halide prepared in the presence of a tetrasubstituted thiourea as a silver halide solvent and was hardened with a hardener containing a vinylsulfonyl group. Combined use of the tetrasubstituted thiourea and the hardener of the above-described kinds increases the storability of the light-sensitive material.

Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the light-sensitive silver halide emulsion layer or other layer is a hydrophilic colloid layer containing a polyoxyethylene surface active agent represented by general formula (I) or (II) described below, and a nitron compound selected from nitron, an inorganic acid salt thereof and an organic acid salt thereof. ##STR1## wherein R.sub.1, R.sub.2, R.sub.6 and R.sub.8, which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a halogen atom, a substituted or unsubstituted acyl group, a substituted or unsubstituted amido group, a substituted or unsubstituted sulfonamido group, a substituted or unsubstituted carbamoyl group or a substituted or unsubstituted sulfamoyl group; R.sub.5 and R.sub.

Abstract: A silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally fogged silver halide emulsion is development-processed in the presence of at least one compound selected from the group consisting of compounds represented by the general formulae (I) and (II) and at least one azaindene having a mercapto group to exhibit high photographic speed, high contrast and high maximum image density:R.sub.1 --(R.sub.3).sub.l X}.sub.n R.sub.3 '--R.sub.2 (I)wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an aryl group, an aryl group, or a heterocyclic group; R.sub.3 and R.sub.3 ' each represents an alkylene group, an arylene group, a heterocyclic group; X presents ##STR1## R.sub.4 represents a hydrogen atom or --R.sub.5 --Y}.sub.m R.sub.5 '--R.sub.6 ; R.sub.5 and R.sub.5 ' have the same meanings as R.sub.3 and R.sub.3 '; R.sub.6 has the same meaning as R.sub.1 and R.sub.2 ; Y represents ##STR2## R.sub.7 has the same meaning as R.sub.1 and R.sub.

Abstract: A silver halide photographic material is disclosed. The material is comprised of a support base having positioned thereon a silver halide emulsion layer and a surface protective layer. The emulsion layer contains a photosensitive silver halide emulsion, an internally fogged silver halide emulsion and a compound represented by the general formula (I):R.sub.1 [(R.sub.3).sub.l X].sub.n R.sub.3 '--R.sub.2wherein the substituents within the general formula (I) are defined within the specification. The photographic material is capable of providing an image having a high maximum density at a high speed and a high contrast. The material can be processed without requiring any specific additives in a short developing period using low-temperature processing. The material also possesses high-temperature quick processing aptitude.

Abstract: A direct positive silver halide material is disclosed. The material is comprised of a support base having a silver halide emulsion layer thereon which contains at least one phenazine series compound represented by the general formula (I), (II) or (III) and at least one compound represented by the general formula (IV), (V) or (VI). The structural formulae are shown within the specification wherein their substituents are defined. By including one compound of each of these groups within the material the resulting material provides images with a reduced minimum density without reducing the contrast of the images formed.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer and a protective layer. The material contains a photosensitive silver halide emulsion and inside fogged silver halide emulsion as well as a disulfide compound. The disulfide compound is a compound represented by the general formula (I):A--S--S--B (I)wherein A and B independently represent an alkyl group, an aralkyl group, an aryl group, a heterocyclic group or ##STR1## wherein R represents an alkyl group, an aryl group, an aralkyl group, a heterocyclic group or an amino group. The material can form images having high contrast and a high maximum density. Further, the material has high sensitivity to light and can be developed at a low temperature in a reduced amount of time.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material is comprised of a support having positioned thereon a silver halide emulsion layer and a compound represented by the general formula (I): ##STR1## wherein R is a halogen atom or an alkyl group and n is 1, 2 or 3 and when n is 2 or 3 each R may be the same or different. Utilization of the compound represented by the general formula (I) aids in the elimination of the generation of fog without creating undesirable influences on the photographic properties of the material.