Abstract: The support member for photographic printing paper of the present invention has a coating layer which comprises white pigment and hydrophobic binder soluble in an organic solvent on a base material, whereby voids are formed in said coating layer. The support member increases whiteness degree and gives an image with excellent sharpness.

Abstract: A light-sensitive heat-sensitive recording material is disclosed, which contains microcapsules resulting from a solution containing at least one component capable of undergoing color development or achromatization as a core material of the microcapsules and a volatile solvent which has a water solubility of 10% by volume or less and has a low boiling point such that it volatilizes during a process for preparing said light-sensitive heat-sensitive recording material leaving substantially no trace of the solvent in the resulting recording material. As the microcapsules, ones having a mean particle size of 2 .mu.m or less are preferred, and ones prepared using a modified gelatin as a protective colloid are also preferred. Further, as the support of the light-sensitive heat-sensitive recording material, a polyester support filled with a white pigment can preferably be used.

Abstract: In the support member for photographic printing paper of the present invention, a white reflective layer is placed on a base material by coating and drying a coating composition, said coating composition contains a white pigment having titanium oxide as principal component and a binder having a copolymer of vinyl chloride - vinyl acetate and maleic acid anhydride soluble in organic solvent and having polymerization degree of 250 or more, said copolymer containing vinyl chloride, vinyl acetate and maleic acid anhydride by component ratio of 20-90 weight %: 5-50 weight %: 2-10 weight %. Thus, the support member can provide photographic image with high resolving power, has high bonding property with base material and silver halide emulsion layer, is easier to produce, and causes discoloring less frequently due to time or heat.

Abstract: A photographic support is disclosed, comprising a metal surface having mirror reflectivity or secondary diffuse reflectivity and an adhesive layer provided on the metal surface, wherein the adhesive layer comprises a copolymer containing vinylidene chloride, vinyl chloride, vinyl acetate and maleic anhydride.

Abstract: A photographic support comprising a substrate having thereon a metal film layer having mirror reflective surface or secondary diffuse-reflective surface and an adhesive layer on the metal film layer, wherein the adhesive layer contains a copolymer composition of a diolefin and at least one other ethylenically unsaturated polymerizable monomer, or a silane coupling agent represented by formula (2-I) or (2-II): ##STR1## wherein Y represents an organic functional group, R represents an alkylene group having 1 to 5 carbon atoms, R' represents an alkoxy group having 1 to 4 carbon atoms, and n represents 2 or 3.

Abstract: A photographic support comprising a paper sheet coated with a polyolefin on both surfaces thereof, in which the paper sheet contains an alkylketene dimer mixtures, its alkyl chain composition being defined by the following equation: ##EQU1## in which [C.sub.14 and less] means the content of alkyl chains having carbon atoms of 14 and less; [C.sub.16 ] means the content of an alkyl chain having 16 carbon atoms; [C.sub.18 ] means the content of an alkyl chain having 18 carbon atoms; and [C.sub.20 and more] means the content of alkyl chains having carbon atoms of 20 and more, the alkyl chain contents being represented by % in number of the total alkyl chain content of the alkylketene dimer composition. The photographic support is effectively resistant to permeation of a developing solution.

Abstract: A photographic support having a secondary diffuse-reflective surface is disclosed, wherein a thin metal layer is provided on the matted surface of a substrate and the center plane average roughness, as determined by a three dimensional roughness measuring apparatus, of the thin metal layer is 0.1 to 1.2 .mu.m.

Abstract: Heat-sensitive recording paper comprising a paper support onto which a heat-sensitive color-forming layer has been coated, wherein the paper support comprises a base paper having coated thereon a subbing layer comprised of a mixture of fine particles of a thermoplastic resin and a binder, thus whereby enhancement of the rate and the uniformity of contact of the heat-sensitive paper with a thermal head or like recording means is achieved.

Abstract: The present invention relates to a photographic support comprising, on a substrate, a filling layer comprising a fine solid powder having the stationary diffuse-reflective surface and a color photosensitive material comprising at least one silver halide emulsion layer formed on the secondary diffuse-reflective surface of a filling layer comprising a solid powder formed on a substrate. A photographic support of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shade areas and sharpness. A printing color photosensitive material of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shades and sharpness and also capable of rigid development.

Abstract: A light-sensitive material comprises a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. Another light-sensitive material comprises a light-sensitive layer containing a photo polymerizable composition or a photo polymerizable compound provided on a paper support. The paper support employs a base paper sheet having such distribution of formation that the total coefficient of variation relating to the distribution curve of laser beam transmittance is not more than 15%. The distribution curve of laser beam transmittance is obtained by helium-neon laser scanning.

Abstract: A photographic support comprising a paper sheet coated with a polyolefin on both surfaces thereof, in which the paper sheet contains an alkyletene dimer mixtures, its alkyl chain composition being defined by the following equation: ##EQU1## in which [C.sub.14 and less] means the content of alkyl chains having carbon atoms of 14 and less; [C.sub.16 ] means the content of an alkyl chain having 16 carbon atoms; [C.sub.18 ] means the content of an alkyl chain having 18 carbon atoms; and [C.sub.20 and more] means the content of alkyl chains having carbon atoms of 20 and more, the alkyl chain contents being represented by % in number of the total alkyl chain content of the alkylketene dimer composition. The photographic support is effectively resistant to permeation of a developing solution.

Abstract: The present invention relates to a photographic support having a secondary diffuse-reflective surface, and a color photosensitive material comprising at least one silver halide emulsion layer formed on the secondary diffuse-reflective surface of a photographic support. A photographic support of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shadow areas and sharpness. A color photosensitive material of the present invention provides an image having remakably improved brightness, saturation, tone reproducibility in shades and sharpness and also capable of rapid development.

Abstract: A support for photographic paper which has a polyethylene coat formed on both sides of a base paper containing a cationic softening agent. In a preferred embodiment, the base paper is surface-sized. The support has improved surface smoothness.

Abstract: A novel heat-sensitive recording paper is provided which comprises a paper support having thereon a heat-sensitive color forming layer, wherein the paper support is made of a base paper which is 7% or less in the sum of fluctuations in uneven formation in a wavelength range of 12.5 to 80 mm as determined by means of a laser formation measuring apparatus.

Abstract: A heat-sensitive recording paper is disclosed. The paper comprises a paper support having provided thereon a heat-sensitive color-forming layer wherein said paper support has at least 10 wt % of a white pigment contained in its interior and which also contains a polymer latex with an MFT (minimum film-forming temperature) of no higher than 40.degree. C. in an amount of from 5 to 30 wt % based on the weight of the white pigment.

Abstract: A heat-sensitive recording sheet comprising a paper support having provided thereon a heat-sensitive coupling layer, said paper support having an intermediate layer containing at least one white pigment disposed on a base paper comprising a mixture of synthetic pulp and natural pulp. The heat-sensitive recording sheet has increased contact with a thermal head, a high recorded density and good dot reproducibility.

Abstract: A heat-sensitive recording paper comprising a support having coated thereon a heat-sensitive color-forming layer, wherein the support contains an inorganic fiber.

Abstract: A heat-sensitive recording paper is disclosed, comprising a paper support with a heat-sensitive color forming layer provided thereon, wherein the paper support has an internal bonding force of from 0.5 to 2.0 kg.multidot.cm and a cobb water absorption of 10 to 20 g/m.sup.2. This recording paper avoids problems of sticking and piling, and is very suitable for use in high speed recording.

Abstract: A heat-sensitive recording paper is described, comprising a paper support having formed thereon a heat-sensitive color forming layer, wherein said paper support is subjected to surface sizing with a synthetic sizing agent so as to have a Cobb-water absorption degree as defined by JIS-P-8140 of 25 g/m.sup.2 or less.

Abstract: A photographic paper comprising a paper sheet coated on each side with a polyolefin resin layer and a photographic emulsion layer provided on the polyolefin resin layer on the front side, which is characterized in that the polyolefin resin layer on the back side is provided with a antistatic coating layer comprising (a) a latex which contains an alkyldiphenylether sulfonate or a formalin condensate of naphthalenesulfonate, (b) colloidal silica, and (c) an alkaline salt aluminate.