Abstract: An electrophotographic lithographic printing plate is described, comprising an electrically conductive support and a photoconductive layer on the support, said layer being made mainly of a photoconductive zinc oxide and a resin binder, wherein in the surface of the photoconductive layer, the degree of exposure of photoconductive zinc oxide is from 10% to 70%.

Abstract: A water-proof support of photographic paper comprising a substrate and a white pigment-containing resin layer provided on at least one surface of the substrate, in which the resin layer comprises a white pigment dispersed in a polymer binder made by polymerization of a unsaturated compound containing a tetraacrylate ester of pentaerythrithol alkylene oxide adduct. An adhesive layer may be provided between the substrate and the white pigment-containing resin layer.

Abstract: A process for producing a support for photographic paper is described, having a layer hardened by irradiation with electron beams on at least one surface of the paper support, comprising coating a mixture of an organic compound capable of being hardened by irradiation with electron beams and a white pigment on a shaping face, hardening the layer by irradiation with electron beams in that state, adhering the resulting coated layer to a base paper by an adhesive, and then peeling off the base paper having the coated hardened layer from the shaping face.A support for photographic paper is produced by the process. The support has superior properties with respect to the surface configuration and good whiteness.

Abstract: A support for photographic paper is described, which comprises a sheet of paper coated with a composition comprising an unsaturated bond-containing electron beam-polymerizable organic compound and an inorganic white pigment that is subjected to electron beam irradiation for curing, wherein said unsaturated bond-containing organic compound (A) and said inorganic white pigment (B) are present in a weight ratio (A)/(B) of from 3/1 to 1/9, and said unsaturated bond-containing organic compound comprises an unsaturated organic compound (C) containing two carbon-to-carbon double bonds per molecule and an unsaturated organic compound (D) containing three carbon-to-carbon double bonds per molecule, and the weight ratio (C)/(D) is from 49/51 to 1/99.

Abstract: Photographic resin-coated paper comprising a paper sheet and a polyolefin resin layer coated over at least one surface of the paper sheet, in which the polyolefin resin contains titanium dioxide powder coated with an alcohol having 2-18 carbon atoms and 2-4 hydroxyl groups, and the surface of the polyolefin resin layer has been activated by corona discharge or flame.

Abstract: A process for producing supports for a photographic paper which comprises applying a layer of a composition containing an unsaturated organic compound capable of being polymerized or hardened upon irradiation with electron beams and an inorganic white pigment to a support, irradiating the layer with a first irradiation with electron beams to imcompletely harden the unsaturated organic compound, pressing the incompletely hardened layer against the surface of a roll to transfer the surface configuration of the roll to the layer, and then further irradiating the layer with a second irradiation with electron beams to more fully harden the unsaturated organic compound in the layer.

Abstract: An electrophotographic plate-making material comprising a paper support and a photoconductive layer is described. This paper support is prepared by providing a polyolefin resin layer on both surfaces of a paper substrate by molten extrusion lamination, and is characterized in that the volume electric resistance is not more than 10.sup.10 .OMEGA. and the polyolefin resin layer contains electrically conductive carbon black having a loss on drying, as determined under the conditions of 110.degree. C. and 2 hours, of not more than 1.0%. Using this plate-making material, there can be produced a lithographic printing plate having good dimensional stability and long press life.

Abstract: A support for electrophotographic plate-making material comprising (1) a paper base; (2) a polyolefin layer on both sides of the paper base, wherein the polyolefin layer has a volume electric resistance of 10.sup.10 .OMEGA. or less; and (3) an ionomer coated between the paper base and the polyolefin layer, wherein the ionomer is prepared by ion-crosslinking a copolymer comprising at least one .alpha.-olefin and at least one .alpha.,.beta.-ethylenically unsaturated carboxylic acid with a monovalent, divalent or trivalent ion of a metal of Group I, II, III, IV-A or VIII of the periodic table.

Abstract: A process for the preparation of a photographic resin-coated paper which comprises subjecting a paper sheet to corona discharge treatment or flame treatment, and then coating the so treated paper sheet with polyolefin resin containing titanium dioxide powder coated with an alcohol having 2-18 carbon atoms and 2-4 hydroxyl groups.

Abstract: In a photographic resin-coated paper comprising a polyolefin resin layer containing titanium dioxide powder therein and having embossed pattern on the surface, the improvement comprises employment of titanium dioxide powder coated with an alcohol having 2-18 carbon atoms and 2-4 hydroxyl groups as the titanium dioxide powder.

Abstract: A process for the preparation of a photographic resin-coated paper which comprises coating paper sheet with polyolefin resin of melt index in the range of 1.0-40 g./10 min. containing titanium dioxide powder coated with an alcohol having 2-18 carbon atoms and 2-4 hydroxyl groups.

Abstract: A photographic resin coated paper having improved resolving power of print images is disclosed. The paper is comprised of a base paper sheet having coated thereon polyolefin resin containing particles of titanium oxide pigment. The surface of the pigment particles are coated with a polyhydric alcohol containing from 2 to 4 hydroxyl groups. The polyolefin resin is coated on the paper by extrusion coating.

Abstract: A recording sheet, especially useful for measuring pressures of 1 to 2,000 kg/cm.sup.2 with a high degree of accuracy, comprising a support, a recording layer thereon, and a protective layer of a transparent synthetic resin provided on top of the recording layer by extrusion coating, the recording layer containing microcapsules having a .delta./D ratio (as defined in the specification hereof) of about 1.5 .times. 10.sup.-3 to about 2.5 .times. 10.sup.-1.

Abstract: A recording sheet for pressure measurement comprising a regularly embossed support having coated thereon at least one of a color former or color formers, preferably contained in microcapsules, and a developer.