Abstract: Disclosed is a photographic printing paper support which comprises a raw paper having polyolefin resin coats on the both sides, with the raw paper being made from pulp slurry containing an epoxidized higher fatty acid amide and/or an alkylketene dimer and a cationic substance other than epoxidized higher fatty acid amides by the addition thereinto in an early stage of the preparation and further containing anionic colloidal silica and/or anionic bentonite added in a late stage of the preparation after controlling the pulp concentration so as to range from 0.1 to 1.5%.

Abstract: A silver halide color photographic material comprises, a paper support having thereon a photographic constituent layer containing at least each one of a yellow coupler-containing layer, a magenta coupler-containing layer and a cyan coupler-containing layer, wherein that said magenta coupler is represented by formula (I), the weight ratio of a high boiling organic solvent in the same layer as said yellow coupler to said yellow coupler is 0.40 or less, and the pH value of the raw paper constituting said support is in the range of 5 to 9.In a preferred embodiment, at least one of the yellow couplers is represented by formula (II).

Abstract: A support for used in photographic printing paper is provided comprising a base paper covered on both sides with polyolefin coating, said base paper being one which has undergone calender treatment between a metallic roll and a synthetic resin roll and then between a metallic roll and another metallic roll.In a preferred embodiment, the calender treatment is performed at the final finishing process. The calender treatment between the metallic roll and the synthetic resin roll is performed in such a manner that the density of the paper is increased to from 0.70 to 1.00 g/cm.sup.3 and the calender treatment between the metallic rolls is performed in such a manner that the density of the paper is increased to from 1.00 to 1.20 g/cm.sup.3. The material of the synthetic resin roll is selected from the group consisting of urethane resin, ebonite resin, nylon resin, aramide resin and isocyanurate resin. The hardness of the synthetic resin roll is from 60 to 90, preferably 75 to 90 in terms of Shore hardness.

Abstract: A photographic printing paper support is described in which a raw paper material is prepared at a neutral pH range using a copolymer-type cationic polyacrylamide in the presence, when required, of an epoxidized higher fatty acid amide, both sides of the raw paper being coated with a polyolefin resin. Based on this production process, the permeation of developing solution into the support at the time of development processing can be sufficiently prevented. Also, wetting on the wire during the manufacture of the support can be improved. With the use of the epoxidized higher fatty acid amide as a sizing agent, the production cost can be reduced significantly.

Abstract: A photographic printing paper support is disclosed comprising a base paper having a polyolefin coated on both sides thereof, wherein the base paper is internally sizing-treated with an epoxidized fatty acid amide composition comprising (1) behenic acid or a higher fatty acid mixture having behenic acid as a main component, at least one of diethylenetriamine and triethylenetetramine and (3) epichlorohydrin.

Abstract: A light-sensitive material comprises a light-sensitive layer containing silver halide, a reducing agent and an ethylenic unsaturated polymerizable compound provided on a paper support (the silver halide and polymerizable compound are contained in microcapsules which are dispersed in the light-sensitive layer). 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 photo polymerizable composition or photo polymerizable compound is contained in microcapsules which are dispersed in the light-sensitive layer). The paper support employs a base paper sheet having a void volume of not higher than 40%.

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 light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and an ethylenic unsaturated polymerizable compound provided on a paper support. The paper support comprises a coating layer containing a hydrocarbon resin provided on a base paper sheet, and the paper support has a low water absorptiveness of not more than 1 g/m.sup.2 on the surface of the coating layer on which the light-sensitive layer is provided. The water absorptiveness being a value measured according to the Cobb test method.

Abstract: A support for photographic printing paper containing a base paper having polyolefin coated on both surfaces thereof, wherein as the base paper is used a one side-machine glazed paper having a glossy surface which is obtained by bringing one surface of a wet paper into intimate contact with the mirror surface of a heated mirror surface type drier and drying.

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, wherein the paper support comprises a coating layer containing a hydrophobic polymer and a pigment provided on a base paper sheet. The coating layer has a pH value in the range of 4 to 9.

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: A light-sensitive material comprises a paper support and a light-sensitive layer containing silver halide grains, a reducing agent and an ethylenic unsaturated polymerizable compound. The silver halide grains and polymerizable compound are contained in microcapsules which are dispersed in the light-sensitive layer. The light-sensitive layer has a pH value of not higher than 8. The paper support has a pH value of from 5 to 9. An image-forming method employing the light-sensitive material is also disclosed.

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 light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. A surface of the paper support on which the light-sensitive layer is provided has a low water absorptiveness of not more than 3 g/m.sup.2 which is a value measured according to Cobb test method.

Abstract: An image-forming method comprises:imagewise exposing a light-sensitive material comprises a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a support to form a latent image of the silver halide;simultaneously or thereafter developing the light-sensitive material to imagewise polymerize the polymerizable compound; andpressing the light-sensitive material on an image-receiving material comprising an image-receiving layer provided on a paper support to transfer the unpolymerized polymerizable compound to the image-receiving material.

Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. The paper support has a low shrinkage ratio of not more than 0.15% both in the machine direction and in the cross direction. The shrinkage ratio is a value measured at the change of relative humidity from 75% to 60%.

Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. The paper support has a low air permeability of not less than 300 seconds. The air permeability is a time required for 100 ml of air to pass through the paper support of an area of 645 mm.sup.2 at pressure of 567 g.

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: 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 light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. A surface of the paper support on which the light-sensitive layer is provided has such a smooth surface that the smoothness value in terms of the Bekk Smoothness is not less than 300 seconds. The Bekk Smoothness is a value measured using the Bekk Tester.