Abstract: There are disclosed an ink-jet recording material comprising a support, and an ink-receptive layer provided on the support, wherein the ink-jet recording material contains at least one compound selected from a carbohydrazide compound in which at least one nitrogen atom at 1-position and 5-position is substituted by two substituents other than a hydrogen atom and a compound having a 4-oxysemicarbazide structure, and ink for ink-jet recording comprising at least one of the above-mentioned compound.

Abstract: There is disclosed an ink-jet recording material including a water resistant support, and a porous ink-receptive layer containing inorganic fine particles having an average particle size of primary particles of 30 nm or less provided on the support, wherein the ink-jet recording material contains at least one hydrazine compound.

Abstract: There are disclosed an ink-jet recording material comprising a support, and an ink-receptive layer provided on the support, wherein the ink-jet recording material contains at least one compound selected from a carbohydrazide compound in which at least one nitrogen atom at 1-position and 5-position is substituted by two substituents other than a hydrogen atom and a compound having a 4-oxysemicarbazide structure, and ink for ink-jet recording comprising at least one of the above-mentioned compound.

Abstract: There is disclosed an ink-jet recording material comprising a water resistant support, and a porous ink-receptive layer containing inorganic fine particles having an average particle size of primary particles of 30 nm or less provided on the support, wherein the ink-jet recording material contains at least one hydrazine compound.

Abstract: Disclosed is a lithographic printing plate material comprising a support and, provided thereon, at least a silver halide emulsion layer and a physical development nuclei layer wherein the physical development nuclei layer and/or a layer contiguous thereto contains at least one of water-soluble polymers represented by the following formula (I) or at least one of water-soluble polymers represented by the following formula (II): ##STR1## wherein R.sub.1 represents H or an alkyl group, R.sub.2 represents H or an alkali metal atom, n is 1-100 mol %, m is 0-50 mol % and l is 0-5 mol %, ##STR2## wherein R.sub.3 and R.sub.4 each represent a hydrogen atom or a lower alkyl group and A represents a residue of an ethylenically unsaturated monomer, l is 99.9-40 mol %, m is 0.1-10 mol % and n is 0-50 mol %. The polymer of the formula (I) may be used in combination with a water-soluble polysaccharide.

Abstract: Disclosed is an electrophotographic photoreceptor which is high in sensitivity and endurance and which comprises an electroconductive support and, provided thereon, a photosensitive layer which contains a hydrozone compound represented by the following formula [I], [II], or [III]: ##STR1## wherein the various subgroups designated by R or A are as described in the specification.

Abstract: This invention provides an electrophotographic photoreceptor which is high in durability and high in sensitivity. This photoreceptor comprises an electroconductive support and, provided thereon, a photosensitive layer containing an azo pigment represented by the following formula [I] or [II]: ##STR1## wherein A represents a hydrogen atom, an alkyl group, a phenyl group or a heterocyclic ring group, m and n each represents 0 or 1, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue, or ##STR2## wherein Z represents an alkyl group, a phenyl group or a heterocyclic ring group, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue.

Abstract: Disclosed is an electrophotographic photoreceptor which is high is sensitivity and high in endurance and which contains in photosensitive layer a novel stilbene compound represented by the following formulas [I], [II], or [III]: ##STR1##

Abstract: The present invention provides an electrophotographic photoreceptor which comprises an electroconductive support and, provided thereon, a photosensitive layer containing at least one hydrazone compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl, alkenyl, aralkyl, aryl or heterocyclic group which may be substituted, and at least one of R.sup.1 and R.sup.2 is an alkenyl group and R.sup.3 and R.sup.4 each represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom.

Abstract: This invention provides an electrophotographic photoreceptor which is high in durability and high in sensitivity. This photoreceptor comprises an electroconductive support and, provided thereon, a photosensitive layer containing an azo pigment represented by the following formula [I] or [II]: ##STR1## wherein A represents a hydrogen atom, an alkyl group, a phenyl group or a heterocyclic ring group, m and n each represents 0 or 1, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue, or ##STR2## wherein Z represents an alkyl group, a phenyl group or a heterocyclic ring group, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue.

Abstract: This provides an electrophotographic photoreceptor high in durability and sensitivity which comprises an electroconductive support and, provided thereon, a photosensitive layer containing an azo pigment represented by the formula [I]: ##STR1## wherein A represents an aryl group, a heterocyclic group or an alkyl group, Z represents a hydrogen atom, --B or --CH.dbd.CH--B wherein B represents an aryl group, a heterocyclic group or an alkyl group and Cp represents a coupler residue.

Abstract: An electrophotographic photoreceptor excellent in properties after repeated use and durability is provided by containing a bis-azo pigment represented by the following general formula [I] or [II] in the light-sensitive layer on the conductive support: ##STR1## wherein X represents --O--, --S--or >N--R.sub.4 wherein R.sub.4 represents a hydrogen atom, an alkyl group or an aralkyl group, R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group or a group of atoms necessary to form a condensed ring by combination of two or them, Y.sub.1 and Y.sub.2 each represent a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, A represents a coupler residue necessary to produce an azo pigment and n is 0 or 1; ##STR2## wherein Y.sub.1 and Y.sub.2 each represent a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, R.sub.1 and R.sub.

Abstract: There is disclosed an electrophotographic photoreceptor comprising an electroconductive support and, provided thereon, a photosensitive layer containing (A) a trisazo pigment formed by the reaction between a coupler component represented by the following general formula (I) and a diazonium salt represented by the following general formula (II) or (B) a bisazo pigment represented by the following general formula (III): ##STR1## wherein Z is a substituted or unsubstituted hydrocarbon ring or a group of atoms necessary to complete a substituted or unsubstituted hetero ring, R is oxygen, sulfur, or --NR'--, Y is a chain hydrocarbon necessary to complete a 5- or 6-membered ring, and R' is hydrogen or an alkyl, benzyl, or aryl group which may have a substituent; ##STR2## wherein A is a trivalent moiety whose carbon atom is bonded to nitrogen atom forming azo group and X.crclbar.

Abstract: An electrophotographic material comprises a conductive support and a light-sensitive layer containing at least one of the azo compound of the formulas [I]-[III]:formula [I]:Cp.sub.1 --N.dbd.N--A--N.dbd.N--Cp.sub.2A represents a divalent residue which bonds through C atoms to N atoms which constitute azo and Cp.sub.1 is a group of by the formula: ##STR1## Z represents a substituted or unsubstituted carbocyclic aromatic ring, a substituted or unsubstituted heterocyclic aromatic ring or a unsaturated monocyclic hydrocarbon ring and R represents an aryl group containing one or two CF.sub.3 groups and Cp.sub.2 is a coupler residue different from said Cp.sub.1 and is selected from following formulas (a)-(f): ##STR2## Z.sup.1 and Z.sup.2 represent a substituted or unsubstituted aromatic hydrocarbon ring or substituted or unsubstituted hetero ring, R.sup.1 and R.sup.2 represent substituted or unsubstituted alkyl, aralkyl, aryl or hetero ring group, R.sup.3 represents an alkyl or carboxyl group or an ester thereof, R.

Abstract: Photoconductive materials for electrophotography which have high sensitivity and high durability are provided by incorporating at least one hydrazone compound represented by the following general formula (I) in photoconductive layer: ##STR1## (wherein M is 0, 1, 2 or 3 and l is 1 or 2), R.sub.2 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom,R.sub.3 is a hydrogen atom, a lower alkyl group or an aryl group,R.sub.4 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom,R.sub.5 is an allyl group, propenyl group or ##STR2## (wherein R.sub.6 is a lower alkyl group, a lower alkoxy group or a halogen atom), and n is 0 or 1.

Abstract: Method for making lithographic printing plates by silver salt diffusion transfer process is disclosed. That is, lithographic printing plates having excellent printing endurance are obtained by carrying out the diffusion transfer processing in the presence of a compound having the ring structure ##STR1## which may be present in at least one constitutive layer of the printing plate materials (photographic materials) used for making the printing plates or in the diffusion transfer processing solution.

Abstract: A high-contrast direct positive prefogged silver halide emulsion free from coror stain, which contains at least one new dimethinecyanine dye wherein the 3-position of a pyrazolo[1,5-a]pyridine nucleus is bonded through a dimethine chain to the 1-, 2-, 3- or 4-position of a cyanine hetero ring nucleus, provided that where the bonding is in the 4-position said cyanine nucleus is a quinoline nucleus or a pyridine nucleus and where the bonding is in the 1- or 3-position said cyanine nucleus is an isoquinoline nucleus, said dimethyinecyanine dye being present in an amount sufficient to sensitize said emulsion.

Abstract: This invention discloses a heat-sensitive recording sheet which comprises a support and, coated thereon, a heat-sensitive composition containing an organic base and at least one acylated lactone or sultone type acidic leuco dye capable of forming a color by reaction with said organic base at an elevated temperature. The invention further discloses as one embodiment a multicolor heat-sensitive recording sheet prepared by adding to the above-mentioned chromogenic system a chromogenic system comprising a normally solid phenolic substance and at least one basic chromogenic substance capable of forming a color by reaction with said phenolic substance at an elevated temperature. Preferable examples of the above-mentioned leuco dye are acrylated xanthene lactone type leuco dyes.