Abstract: Disclosed is an acceptor coated sheet for pressure-sensitive copying system comprising a base sheet and an acceptor layer disposed thereon, said acceptor layer being formed from an acceptor coating composition comprising(a) at least one immobilizing agent selected from the group consisting of the sulfates, nitrates, acetates and formates of zinc, aluminum and magnesium,(b) a latex of copolymer containing an unsaturated carboxylic acid as a monomer component and, if necessary, a water-soluble binder,(c) an organic acceptor, and(d) at least one pigment selected from the group consisting of zinc oxide, magnesium oxide, titanium oxide, aluminum hydroxide, calcium carbonate, calcium sulfate and kaolin.

Abstract: Disclosed is a method for producing a laundry-resistant recording medium comprising a receiving substrate and thermally transferred record images formed on the receiving substrate, the method comprising the steps of forming record images on a receiving substrate of thermal transfer using a thermal transfer recording medium which comprises a layer of a heat-fusible ink comprising a hydroxyl group-containing substance having a softening point of about 50.degree. to about 300.degree. C.; and treating the record images with a polyisocyanate.

Abstract: A heat sensitive recording material comprising a substrate and a heat sensitive recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor reactive with the dye to form a color when contacted therewith, the recording material being characterized in that the material has a heat sensitive recording layer having incorporated therein (1) a heat-fusible substance exhibiting a weight reduction of at least 5% at 200.degree. C. based on the weight at 25.degree. C. under the condition of 20.degree. C./min in the rate of rise of temperature, (2) a wax, (3) a lubricant, and (4) an oil-absorbing pigment at least 85 ml/100 g in oil absorption.

Abstract: Disclosed is a heat-sensitive recording material comprising a support; a heat-sensitive recording layer formed over the support and containing a color forming material, a color developing material which forms a color on contact with the color forming material and a pigment which is about 80 to about 400 ml/100 g in oil absorption according to JIS K 5101 and about 3 to about 15 .mu.m in average particle size; and an overcoat layer formed over the heat-sensitive recording layer and comprising a binder and a pigment, wherein the pigment is used in an amount of about 0.5 to about 3.0 parts by weight per part by weight of the binder and the coating amount of the overcoat layer is about 0.3 to about 2.0 g/m.sup.2 on dry basis.

Abstract: Disclosed is an electrostatic recording medium comprising an electroconductive support and as formed thereon a dielectric layer containing an insulating resin and a pigment, said dielectric layer carrying a surface static charge of a polarity opposite to that of a charge to be applied for image formation.

Abstract: Disclosed is a heat-sensitive recording material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and comprising a colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the heat-sensitive recording material being characterized in that the heat-sensitive record layer contains as the color developing material at least one multi-valent metal salt of a halophthalic acid derivative represented by the formula ##STR1## wherein R represents a divalent saturated or unsaturated C.sub.2 -C.sub.12 aliphatic hydrocarbon group which may optionally have a hydroxyl, C.sub.1 -C.sub.3 acyloxy or phenyl group as a substituent or a divalent saturated or unsaturated C.sub.4 -C.sub.6 aliphatic hydrocarbon group containing one or two ether bonds, X is a halogen atom and n is an integer of 1-4.

Abstract: Disclosed is a heat-sensitive recording material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and comprising a colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the heat-sensitive recording material being characterized in that the heat-sensitive record layer contains as the color developing material at least one multi-valent metal salt of an indole-2-carboxylic acid derivative represented by the formula ##STR1## wherein R.sub.1 through R.sub.6 are hydrogen or other substituent. The heat-sensitive recording material is resistant to plasticizer and diazo developer, and also is suitable for high-speed recording.

Abstract: Disclosed is a pressure sensitive manifold paper prepared by coating a substrate with a coating composition containing microcapsules of polyurethane resin or polyurea resin wall film and drying the resulting coating, the pressure sensitive manifold paper being characterized in that a latex of copolymer of comonomers comprising about 10 to about 50% by weight of styrene, about 15 to about 55% by weight of butadiene, about 10 to about 40% by weight of methyl methacrylate and up to about 15% by weight of acrylonitrile is incorporated in the coating composition in an amount of about 5 to about 30% by weight (calculated as solids) based on the microcapsules (calculated as solids).The pressure sensitive manifold paper has an adequate balance between the color forming ability and susceptibility to color smudges due to contact or friction.

Abstract: This invention provides a heat-sensitive recording material comprising a substrate and a heat-sensitive recording layer which is formed over the substrate and which contains a diazonium salt, a coupler and at least one of specific heat-fusible basic amidine and diamidine compounds in which the nitrogen atom(s) of ##STR1## moiety(moieties) has(have) a substituent and the nitrogen atom(s) or ##STR2## moiety(moieties) has(have) at least one substituent, the substituent being independently selected from the group consisting of phenyl, naphthyl, phenyl-C.sub.1 -C.sub.4 alkyl and naphthyl-C.sub.1 -C.sub.4 alkyl, each optionally substituted with C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, phenyloxy, nitro or halogen, and in which amidine compounds are other than formamidines. The heat-sensitive recording material is especially excellent in storage stability.

Abstract: This invention provides a heat-sensitive recording material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and containing a color forming material and a color developing material which undergoes a color forming reaction on contact with the color forming material, the heat-sensitive recording material being characterized in that a resin layer containing a cationic-modified starch is formed over the heat-sensitive record layer.The resin-coated heat-sensitive recording material of the invention is free of sticking, and resistant to diazo developer and suppresses the powder-coated phenomenon due to the bleeding of crystallized color forming material, color developing material and the like.

Abstract: In a heat-sensitive recording material in which a resin layer is formed on a recording layer containing at least a color forming material and a color developing material which forms a color when reacted with the color forming material by contact, a heat-sensitive recording material which is characterized in that the resin is essentially composed of an acetoacetylated polyvinyl alcohol and/or a copolymer of vinyl alcohol, acrylonitrile and optionally an other copolymerizable monomer.

Abstract: A heat-sensitive record material for use with an infrared laser containing(a) a color forming material,(b) a color developing material, and(c) a light absorbing material selected from the group consisting of (1) natural or synthetic silicate compounds, and (2) baked products obtained by baking a zinc compound and a clay mineral at a temperature of at least 500.degree. C.

Abstract: An electrostatic record material comprising an electroconductive base sheet and a record layer formed on the base sheet and consisting essentially of an insulating resin, the record material being characterized in that the base sheet includes (i) an electroconductive layer comprising an ionic-conductive substance as its main electroconductive component, and (ii) an electroconductive layer comprising an electronic-conductive substance as its main electroconductive component. The electrostatic record material has excellent recording characteristics at usual humidity.

Abstract: A process for preparing microcapsules for pressure sensitive manifold paper characterized by emulsifying in a hydrophilic liquid a hydrophobic liquid containing an aromatic isocyanate represented by the formula ##STR1## wherein n is an integer of 1 to 10, an aliphatic isocyanate and an electron donating organic chromogenic material, and forming a polymer at the interface to cover hydrophobic liquid droplets with the polymer.

Abstract: This invention concerns with an improved microcapsule dispersion prepared by adding the following components to a known microcapsule dispersion containing PVA; a pulp having a specific weighted average fiber length, another type of pulp, carboxymethyl cellulose and/or a specified periodic acid type compound, and is characterized by overcoming the drawbacks of known microcapsule dispersions attended by use of PVA.

Abstract: A hydrophobic organic solvent containing a compound of the formula ##STR1## is dispersed and emulsified in an aqueous medium containing a sulfinic acid of the formulaR.sub.5 --SO.sub.2 H (I)and serving as an aqueous medium for preparing microcapsules to react the compounds of the formulae (I) and (II) and synthesize a diarylmethane derivative of the formula ##STR2## while encapsulating oily droplets of the resulting hydrophobic organic solvent solution of the diarylmethane derivative. Colorless chromogenic materials can be synthesized and encapsulated at the same time by this process.

Abstract: The present invention relates to a process for removing an aldehyde from dispersions containing the aldehyde by introducing a gas into the dispersion.