Abstract: A photothermographic material comprising a support having thereon a photosensitive layer comprising non-photosensitive organic silver salt grains, photosensitive silver halide grains, a binder, a cross-linking agent, and a reducing agent,

Abstract: A photothermographica material is disclosed, comprising an organic silver salt and a light sensitive silver halide, wherein the photothermographic material contains a hydrophilic binder of 0.5 to 2 g per mol of the organic silver salt and the organic silver salt having been formed in the presence of the silver halide of 7×1015 to 3×1017 grains per mol of the organic salt.

Abstract: A thermally developable photosensitive material comprising organic silver salts, photosensitive silver halides, and reducing agents. The thermally developable photosensitive material has a support having am moisture content of not more than 0.5 percent by weight.

Abstract: A silver halide light sensitive photographic material is disclosed, comprising a support having thereon hydrophilic colloid layers including a silver halide emulsion layer, wherein (i) at least 50% of the total projected area of silver halide grains contained in the emulsion layer is accounted for by tabular grains having an aspect ratio of 3 to 15, (ii) the tabular grains each comprising an inner region which accounts for 70% by volume of the grain and a residual outer region, the outer region containing at least 75% of total iodide contained in the grain, and (iii) the tabular grains each having an outermost layer, a halide content distribution among the tabular grains with respect to the outermost layer being not more than 20%; and wherein at least one of the hydrophilic colloid layers contains a sulfur containing compound, which has a water-solubilizing group.

Abstract: A silver halide black-and-white photographic light sensitive material is disclosed, comprising a support having thereon a silver halide emulsion layer comprising silver halide grains, wherein at least 50% of the total grain projected area is accounted for by tabular grains having a chloride content of 20 mol % or more, two parallel {100}major faces and an average aspect ratio of 2 or more, said tabular grains being prepared by nucleating in the presence of a surfactant comprised of polyalkyleneoxide block copolymer.

Abstract: A composite for radiography is disclosed which essentially consists of a) a silver halide photographic light-sensitive material comprising a transparent support and at least one light-sensitive silver halide emulsion layer provided on each side of the support, b) fluorescent screen A having a 80 kVp X-ray energy absorption of 40% or more and c) fluorescent screen B having a 80 kVp X-ray energy absorption of 50% or more and the absorption more than fluorescent screen A, the material being sandwiched between the screens A and B in such a manner that emulsion layer A is in close contact with screen A and emulsion layer B is in close contact with screen B, wherein the slope of the straight portion in the characteristic curve of emulsion layer A is less than that of emulsion layer B and emulsion layers A and B of the silver halide photographic light-sensitive material have sensitivity on an exposed side that an exposure necessary to give a density of the minimum density +0.5 is 0.027 to 0.040 lux.multidot.second.

Abstract: A silver halide black and white photographic light sensitive material comprising a support having thereon at least two silver halide emulsion layers, a first silver halide emulsion layer being provided on a second silver halide emulsion layer, wherein the first silver halide emulsion layer comprises silver halide tabular grains containing 50 mol % or more chloride and having an average aspect ratio of 3 or more, the second silver halide emulsion layer comprising silver bromide grains or silver iodobromide grains containing 2 mol % or less iodide, and a swelling ratio of the total hydrophilic colloidal layers being 200% or less.

Abstract: A method for preparing silver halide emulsion which comprises silver halide grains containing an average iodide content of not more than 2 mol % comprising the steps of (i) preparing a seed emulsion containing silver halide seed grains, (ii) introducing the seed emulsion into a reaction vessel containing a hydrophilic colloid solution and (iii) introducing into the reaction vessel a silver salt and a halide salt to grow the silver halide grains from the seed grains, wherein in the step (iii), an emulsion containing silver iodide fine grains previously formed is supplied into the reaction vessel as a source of silver iodide; said seed grains are contained in an amount of 0.5 to 5.0% by volume in the hydrophilic colloid solution in the reaction vessel prior to introduction of silver and halide salts.

Abstract: A method for preparing a silver iodobromide emulsion comprising silver iodobromide grains containing an average silver iodide content of 2 mol % or less is provided, wherein the silver iodobromide emulsion is prepared by incorporating simultaneously a silver salt solution and a solution of bromide and iodide salts into a hydrophilic colloid solution containing silver halide seed grains to grow the silver iodobromide grains from the seed grains, wherein the total volume of the solutions of the silver salt and the bromide and iodide salts is within a range of 2 to 10 times the volume of the hydrophilic colloid solution containing the seed grains in an amount of 0.5 to 5.0% by volume.

Abstract: A silver halide light-sensitive photographic material having a support and provided thereon, hydrophlic colloidal layers including at least one silver halide light-sensitive emulsion layer is disclosed. The silver halide emulsion layer comprises a silver halide emulsion (I) prepared by adding a high-molecular flocculant under at least one of Conditions (1) through (3) to a silver halaide emulsion (II) prepared by a water-soluble silver salt solution and a water-soluble halide solution to a protevtive colloid solution so as to flocculate and settle a silver halide grain together with a protective colloid for desalting of dissolved substances, and by dispersing again the desalted silver halide emulsion in a protective colloid solution;Condition (1): a temperature of the silver halide emulsion (II) is not lower than 30.degree. C.