Abstract: A silver halide photographic light-sensitive material comprises a support having thereon photographic component layers including a silver halide emulsion layer, wherein at least one of said photographic component layers contains a compound represented by the following formula:A--(Time)n--FL--BLwherein A represents a group capable of releasing a group of --(Time)n--FL--BL upon reaction with an oxidation product of a developing agent; Time represents a timing group; FL represents a group which comes to emit fluorescence when a --BL is split off; BL represents a group capable of being split off; and n represents an integer of 0 or 1.

Abstract: Pyrazolotriazole couplers having a ballast-containing group of the formula (I) attached to the pyrazolotriazole ring group ##STR1## wherein: R, R.sup.2, R.sup.a and R.sup.b represent hydrogen or a substituent;L is a divalent linking group connecting the ballast containing group to the pyrazolotriazole ring;L' is a linking group connecting the --BD group to the phenylene ring;n is 0 or 1;B represents --N(R.sup.c)--SO.sub.2 --, wherein R.sup.c represents hydrogen or a substituent; andD represents substituted or unsubstituted alkyl are useful in silver halide photographic materials and processes. The couplers exhibit increased coupling efficiency, and provide formation of dyes having improved maximum magenta image dye density when employed in color photographic materials and processes.

Abstract: Photographic coupler compositions comprise (a) a magenta dye-forming coupler compound, and (b) a sulfoxide compound or a sulfone compound in an amount sufficient to improve the light stability of a magenta dye formed from the magenta dye-forming coupler compound. The sulfoxide compound is of the formula ##STR1## and the sulfone compound is of the formula ##STR2## wherein R.sub.1 and R.sub.

Abstract: A silver halide color photographic material, which comprises a support and a silver halide emulsion layer, contains a pyrazoloazole type coupler represented by the following general formula (II) in the emulsion layer, to ensure high sensitivity and high gamma without attended by increase in fog: ##STR1## wherein R.sub.1 represents a hydrogen atom or a substituent group; X represents a hydrogen atom or a group releasable upon coupling with the oxidation product of an aromatic primary amine developing agent; or --NH--; Zb and Zc also represent a methine group, a substituted methine group, .dbd.N-- or --NH--, wherein the substituent of at least either of Zb and Zc is a tertiary alkyl group represented by ##STR2## provided that when Zc is the above-described substituted methine group having the tertiary alkyl group as a substituent, R.sub.

Abstract: There is disclosed a cyan dye-forming coupler represented by formula (I) and a silver halide color photographic material containing same. ##STR1## wherein EWG represents an electron-attractive group having a Hammett substituent constant .sigma..sub.p value of 0.30 or more, R.sub.1 and R.sub.2 each represent a substituent, l represents an integer of 0 or 1, X represents a hydrogen atom or a group capable of being released upon coupling reaction with the oxidized product of an aromatic primary amine derivative, and Y represents a hydroxyl group or a sulfonamido group.

Abstract: A silver halide color photographic material comprises at least one silver halide emulsion layer containing a substantially iodide free silver chlorobromide or silver chloride grain of which the silver chloride content is at least 90 mol. % and a color coupler. The color coupler is at least one compound represented by formula (I) or (II). The coupler is dispersed in the emulsion layer, as a dispersion of a fine lipophilic particle obtained by emulsification and dispersion of a solution obtained by dissolution of the coupler together with at least one homopolymer or copolymer which is insoluble in water and soluble in an organic solvent and a high boiling point organic solvent: ##STR1## R.sub.1, R.sub.4, and R.sub.5 represent aliphatic, aromatic or heterocyclic groups; R.sub.3 and R.sub.6 each represents a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group or an acylamino group, or R.sub.6 represents a group of non-metal atoms required to form, together with R.sub.

Abstract: There are disclosed a novel cyan dye-forming coupler and a silver halide photographic light-sensitive material containing the novel coupler represented by the following Formulas I to V: ##STR1## wherein R represents a substituent; Y represents a substituent having a Hammett's substituent constant .sigma.p of not less than 0.3 and not more than 1.5; Z represents the group of atoms necessary to form a 5 to 7-membered nitrogen-containing heterocyclic ring; l, m and n are the integers of 0 to 4, 0 to 5 and 0 to 3, respectively; and X represents a hydrogen atom or a substituent capable of splitting off upon a reaction with an oxidation product of a developing agent.

Abstract: A method for recording and erasing information by irradiating a specific recording medium with a single laser beam, which is applied with two different intensities respectively for crystallizing a recording layer of the recording medium and for amorphizing a recording layer of the recording medium. According to the present invention, both the recording of information and the erasing of information can be simply performed using a single laser beam by changing only its intensity between the two different laser beam intensities according to a laser beam intensity pattern corresponding to predetermined information.The recording material comprises Sb, Te, Ge and at least one element selected from the group consisting of Pb, Bi, In, Sn and Tl.

Abstract: A color negative photographic recording material is described in which low emulsion coverage tabular grain silver halide emulsion imaging units are employed. The silver halide emulsion in at least one of the units comprises grains having a tabularity of between about 50 and 25,000. The imaging unit thickness is less than about 4.0 .mu.m, using a total of no more than 2.0 parts by weight of silver per part of coupler. The imaging unit yields a density of at least 2.0 when exposed and processed.

Abstract: A silver halide color photographic material comprising a support having thereon one or more layers having a surface pH of 5.0 to 6.5, including at least one silver halide emulsion layer containing a gold-sensitized silver halide emulsion having a silver chloride content of at least 90 mol % and a coupler represented by formula (I): ##STR1## wherein R.sub.1 represents an aryl group or a tertiary alkyl group; R.sub.2 represents fluorine, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a dialkylamino group, an alkylthio group or an arylthio group; R.sub.3 is a group which is substituted for a hydrogen atom on the benzene ring; X represents hydrogen or a group capable of being cleaved upon a coupling reaction with an oxidation product of an aromatic primary amine developing agent; and l is 0 or an integer from 1 to 4.

Abstract: Disclosed are a yellow coupler represented by the following formula (I) and a light-sensitive silver halide color photographic material having at least one silver halide emulsion layer on a support, which comprises a two-equivalent yellow coupler represented by the following formula (I) being contained in at least one of the above silver halide emulsion layers: ##STR1## wherein R.sub.1 represents an alkyl group or a cycloalkyl group; R.sub.2 represents an alkyl group, a cycloalkyl group or an aryl group; R.sub.3 represents a straight unsubstituted alkyl group having 8 to 20 carbon atoms; X represents >NR.sub.4, --O-- or --S(O).sub.n --; Y represents >NR.sub.5 or ##STR2## where R.sub.4 and R.sub.5 each represent an alkyl group, a cycloalkyl group or an aryl group; and R.sub.6 and R.sub.7 each represent hydrogen atom, --OR.sub.8, ##STR3## and --S(O).sub.P R.sub.8 (where R.sub.8 represents an alkyl group, a cycloalkyl group and an aryl group; R.sub.

Abstract: A method of forming a cyan dye image in an exposed silver halide color photographic material comprising a support and a photosensitive silver halide emulsion, said method comprising developing the exposed silver halide color photographic material with a color developing solution containing an aromatic primary amine color developing agent in the presence of a cyan coupler represented by formula (I): ##STR1## wherein EWG.sub.1 and EWG.sub.2 each represents an electron attractive group having a Hammett's substituent constant .sigma..sub.p value of at least 0.30 or;R.sub.1 represents a hydrogen atom or a substituent;R.sub.2 represents a substituent;X represents a hydrogen atom or a group capable of splitting off by a coupling reaction with an oxidation product of an aromatic primary amine color developing agent;R.sub.1 and R.sub.2 may be bonded to each other to form a ring; provided that R.sub.2 must not be a halogen atom; and a silver halide color photographic material containing the cyan dye forming coupler.

Abstract: A recording medium for information comprising a substrate, a recording layer provided on the substrate, in which crystalline phases and amorphous phases are reversibly created in accordance with irradiation energy of a light beam irradiated onto the recording layer, wherein the recording layer includes a ternary alloy having the same composition as an alloy of InTe and In.sub.50-X/2 Sb.sub.50-X/2 Te.sub.X (where X satisfies 20.ltoreq.X.ltoreq.45), i.e.,{In.sub.(100-y)/200 Sb.sub.(100-y)/200 Te.sub.y/100 }.sub.100-z In.sub.z/2 Te.sub.z/2wherein25.ltoreq.y.ltoreq.45 atom %, and0<z.ltoreq.80 atom %, with the proviso that 0<z.ltoreq.60 atom % when y>40 atom % or y<30 atom %.

Abstract: The present invention relates to a silver halide color reversal photographic material comprising photosensitive silver halide photographic layers in which the average silver chloride content of the photosensitive silver halide emulsions is less than 7.0 mol %, at least one emulsion layer of the photographic layers consists of two or more emulsions having different average grain diameters, and the emulsion layer and/or the adjacent intermediate layer contains at least one compound that can release a photographically useful agent by redox reaction with the oxidation product of a developing agent. The silver halide color reversal photographic material of the present invention has a color-reversed image improved in graininess and sensitivity.

Abstract: A silver halide color photographic photosensitive material comprising a yellow image forming photographic coupler, which is capable of forming images having excellent color reproduction and image fastness, and which has a high reactivity with an oxidized form of a developing agent. The aforementioned object has been realized by means of a silver halide color photographic photosensitive material containing a coupler represented by general formula (I): ##STR1## wherein X represents an organic residual group which is required, together with the nitrogen atom, to form a nitrogen containing heterocyclic ring, Y represents an aromatic group or a heterocyclic group, and Z represents a group which is eliminated when the coupler represented by said general formula reacts with the oxidized form of a developing agent.

Abstract: A silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a dispersion of silver halide grains in a binder, wherein the silver halide emulsion layer contains (a) at least one coupler represented by formula (I), (b) at least one compound represented by the formula (II), and (c) at least one compound represented by formula (III), and the photographic material contains (d) at least one compound represented by formulae (IV), (V) or (VI): ##STR1## wherein R, Y, Za, Zb and Zc each is as defined in the specification; ##STR2## wherein R.sub.1, R.sub.2, R.sub.5 and R.sub.6, and R.sub.7 each is as defined in the specification ##STR3## wherein R.sub.11, R.sub.12 and R.sub.13, R.sub.14, R.sub.15, R.sub.16 and R.sub.17 each is as defined in the specification; ##STR4## wherein R.sub.21, R.sub.22 A, B, X, Y.sub.1 and n each is as defined in the specification; andR.sub.30 --Z (VI)R.sub.

Abstract: A silver halide color photographic photosensitive material comprising a support having thereon a at least one silver halide emulsion layer, wherein at least one cyan dye forming coupler represented by the formula (I) indicated below ##STR1## wherein all the symbols are defined in the specification and at least one cyan dye forming coupler which can be represented by the formula (C) indicated below ##STR2## wherein all the symbols are defined in the specification are present in a layer on said support.

Abstract: There is disclosed a light-sensitive silver halide photographic material having at least one light-sensitive emulsion layer and at least one non-light-sensitive emulsion layer of a support, the improvement wherein a coupler represented by the following formula (M-I) and an anti-fading additive having a quenching rate constant of a singlet oxygen of 1.times.10.sup.7 M.sup.-1 .multidot.sec.sup.-1 or more provided that 2,5-dialkylhydroquinones are excluded are contained in at least one layer of the light-sensitive emulsion layer, and a compound represented by the following formula (II) is contained in at least one layer selected from the light-sensitive emulsion layer and the non-light-sensitive emulsion layer.

Abstract: A silver halide color photographic light-sensitive material is disclosed, in which dye images having a high fastness against heat, moisture and light. The light-sensitive material comprises a support having there on a silver halide emulsion layer containing a coupler represented by the following formula I; ##STR1## wherein Za is a --C.dbd. group or a --C.dbd. group, Zb is a nitrogen atom or a ##STR2## group and Zc is a nitrogen atom or a ##STR3## group, provided that when Zb is a nitrogen atom, Za and Zc are the ##STR4## group and the ##STR5## group, respectively, and when Zc is a nitrogen atom, Za and Zb are the ##STR6## group and the ##STR7## group, respectively; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and Y are each a hydrogen atom or a substituent; X is a hydrogen atom or a substituent capable of splitting off upon reaction with the oxydation product of a color developing agent; n and m are each 1 or 0, provided that m+n is 1.

Abstract: Disclosed is a silver halide color photographic material comprising a support thereon having at least one silver halide emulsion layer containing at least one cyan coupler of the general formula (I): ##STR1## where R represents a group capable of being an imidazo[1,2-b]pyrazole skeletal substituent;EWG represents an electron-attracting substituent which does not substantially split off from the formula on reaction of the coupler with an oxidation product of an aromatic primary amine developing agent;X represents a hydrogen atom or a releasable group which splits off from the formula on reaction of the coupler with an oxidation product of an aromatic primary amine developing agent; andn represents an integer of from 1 to 7,providing an excellent cyan dye and cyan image having satisfactory absorption characteristic and color fastness.