Abstract: The present invention relates to a silver halide photographic emulsion and particularly to a silver halide photographic emulsion spectrally sensitized for argon laser beam exposure having an improved high spectral sensitivity to flash exposure using flash rays having main emission peaks at wave lengths of 514.5 nm, 488.0 nm and 476.5 nm (argon laser rays).

Abstract: A silver halide photographic material for use in flash exposure of less than 1/10000 second comprising 10.sup.-8 to 5.times. 10.sup.-7 moles/moles of silver halide of at least one compound belonging to Group VIII of the Periodic Table and at least one of the sensitizing dyes of the following formulas (I) or (II) and which is capable of sensitizing silver halide at less than 55 nm:General Formula I ##STR1## General Formula II ##STR2## WHEREIN R, R.sub.1, R.sub.2, R.sub.3, Q, X.sup.(-), Z, Z.sub.1, Z.sub.2, n, n.sub.1, n.sub.2 and n.sub.3 are as defined in the specification.

Abstract: Process for developing light-sensitive silver halide photographic materials with a developing solution in the presence of one or more of sulfur-containing amine compounds.

Abstract: A method of bleaching an imagewise exposed and then developed silver halide photosensitive material for color photography wherein said material contains a red sensitive silver halide emulsion layer having at least one of a particular group of compounds and treating said photosensitive material with a bleaching or bleach-fixing solution containing an organic metal chelate compound.

Abstract: A lith-type silver halide photographic light-sensitive material for forming halftone dot images is disclosed which contains a sensitizing dye represented by the following general formula: ##STR1## WHEREIN Z.sub.1 is an atomic group necessary for forming a naphthothiazole ring, Z.sub.2 is an atomic group necessary for forming a member selected from a group consisting of substituted or unsubstituted, benzothiazole, benzoselenazole, naphthothiazole and naphthoselenazole nucleus, R.sub.1 and R.sub.2 are respectively a substituted or unsubstituted alkyl group, X.sup..theta. is an anion, and n is a positive integer of 1 or 2 with the proviso that when the dye is an inner salt, n is 1.

Abstract: Novel light-sensitive silver halide photographic materials comprising at least one sensitizing dye having the following formula: ##STR1## wherein Z represents a non-metallic atom group necessary for completing a three membered heterocyclic ring, R represents an alkyl or a substituted alkyl radical, R.sub.1 and R.sub.2 represent hydrogen atoms or lower alkyl radicals, R.sub.3 represents a hydrogen atom, an alkyl or alkoxyl radical, m represents an integer of 0 or 1, X represents an acid anion and forms an inner salt when m is 0, and n represents an integer of 1 or 2.

Abstract: A process for improving the coating of photographic materials by substantially removing coating irregularities and applying more uniform coatings is described.

Abstract: In the refining of steel by an oxygen topblown converter, the temperature and carbon content of molten steel are simultaneously measured by a sensor at a predetermined time before the end point, whereby in accordance with the difference between a calculated carbon content at the endpoint obtained by processing the measured values and a target carbon content at the end-point, the oxygen quantity to be blown in at the end-point and the coolant requirement or the pattern of soft-blow are computed to simultaneously control the temperature and carbon content of the molten steel at the end-point.

Abstract: A light-sensitive silver halide photographic material spectrally sensitized with at least one compound of the formula ##STR1## and at least one compound of the formula ##STR2## wherein Q.sub.1, Q.sub.2, Q.sub.3 and Q.sub.4 are individually a non-metal atom grouping necessary to complete an unsubstituted or alkyl-, alkoxyl-, phenyl-, hydroxyl-, carboxyl- or halogen-substituted benzene ring, or a non-metal atom grouping necessary to complete a naphthalene ring; Z is a sulfur or selenium atom; n.sub.1, n.sub.2, n.sub.3 and n.sub.4 are individually 2, 3 or 4; M.sub.1 and M.sub.2 are individually a hydrogen atom, an alkali metal atom or H-Q where Q is an organic base.

Abstract: A compound having a 2- imidazoline nucleus is used a development accelerator.