Abstract: A silver halide emulsion which exhibits high sensitivity, high contrast, little sensitivity variation with humidity conditions at the time of exposure, and excellent reciprocity law properties at high illumination intensities. Also, a method of preparing the emulsion in a stable manner, and a silver halide color photographic photosensitive material and an image forming method that use the emulsion. The emulsion includes a mesoionic compound having a thiolate structure or a protonated thiolate structure, and the emulsion is sensitized by an Au (III) compound. The emulsion preferably contains an oxidatively dimerized form of a mesoionic compound having a thiolate structure, and a silver chloride content of at least 90 mol %.

Abstract: A method of producing a fine particle of an organic pigment, containing the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium, through a channel which provides a laminar flow; and changing a pH of the solution in the course of the laminar flow.

Abstract: There is disclosed a 1H-pyrrole-[1,2-b][1,2,4]triazole compound represented by formula (I): wherein R is an alkyl group; R1, R2, R3, R1?, R2?, and R3? each are a hydrogen atom or an alkyl group; R1 and R2, and R1? and R2? may bond together to form a ring, respectively; R4 is a hydrogen atom or an alkyl group, and X is heterocyclic group, a substituted amino group, or an aryl group. The compound is useful as a photographic cyan coupler. There is also disclosed synthetic intermediates of the compound and a production method of the intermediates.

Abstract: A silver halide emulsion which exhibits high sensitivity, high contrast, little sensitivity variation with humidity conditions at the time of exposure, and excellent reciprocity law properties at high illumination intensities. Also, a method of preparing the emulsion in a stable manner, and a silver halide color photographic photosensitive material and an image forming method that use the emulsion. The emulsion includes a mesoionic compound having a thiolate structure or a protonated thiolate structure, and the emulsion is sensitized by an Au (III) compound. The emulsion preferably contains an oxidatively dimerized form of a mesoionic compound having a thiolate structure, and a silver chloride content of at least 90 mol %.

Abstract: A silver halide emulsion which exhibits high sensitivity, high contrast, little sensitivity variation with humidity conditions at the time of exposure, and excellent reciprocity law properties at high illumination intensities. Also, a method of preparing the emulsion in a stable manner, and a silver halide color photographic photosensitive material and an image forming method that use the emulsion. The emulsion includes a mesoionic compound having a thiolate structure or a protonated thiolate structure, and the emulsion is sensitized by an Au (III) compound. The emulsion preferably contains an oxidatively dimerized form of a mesoionic compound having a thiolate structure, and a silver chloride content of at least 90 mol %.

Abstract: A silver halide emulsion which exhibits high sensitivity, high contrast, little sensitivity variation with humidity conditions at the time of exposure, and excellent reciprocity law properties at high illumination intensities. Also, a method of preparing the emulsion in a stable manner, and a silver halide color photographic photosensitive material and an image forming method that use the emulsion. The emulsion includes a mesoionic compound having a thiolate structure or a protonated thiolate structure, and the emulsion is sensitized by an Au (III) compound. The emulsion preferably contains an oxidatively dimerized form of a mesoionic compound having a thiolate structure, and a silver chloride content of at least 90 mol %.

Abstract: There is disclosed a 1H-pyrrolo-[1,2-b] [1,2,4]triazole compound represented by formula (I): 1

Abstract: There is disclosed a 1H-pyrrolo-[1,2-b][1,2,4]triazole compound represented by formula (I): wherein R is an alkyl group; R1, R2, R3, R1′, R2′, and R3′ each are a hydrogen atom or an alkyl group; R1 and R2, and R1′ and R2′ may bond together to form a ring, respectively; R4 is a hydrogen atom or an alkyl group, and X is heterocyclic group, a substituted amino group, or an aryl group. The compound is useful as a photographic cyan coupler. There is also disclosed synthetic intermediates of the compound and a production method of the intermediates.

Abstract: An object of the present invention is to provide a heat-developable photosensitive material of improved fluctuation of photographic performance (sensitivity, Dmin) arisen from fluctuation of development temperature condition (temperature, time) and storage time after heat development.

Abstract: Disclosed are a liquid crystal display provided with an optical compensatory sheet comprising an optically anisotropic layer which has negative birefringence and comprises a polymer having a discotic structure in its molecule, and an optical compensatory sheet which comprises a transparent support, an orientation layer provided thereon and the optically anisotropic layer provided on the orientation layer. Further, a process for preparation of the optical compensatory sheet and a liquid crystal composition which is useful as material for preparing the optical compensatory sheet are also disclosed.