Abstract: An improved optical diffuser comprising a transparent support and an optical diffusing layer which is coated on one surface of the support and comprises an organic polymer binder and organic polymer particles is obtained by selecting the constituents to satisfy the conditions that a difference of refractive index between the binder and particles is not more than 0.05; the polymer particles have a mean particle size of 10 to 21 .mu.m; a weight ratio of the particles to the binder in the diffusing layer is within 1.9 to 2.6; a total weight of the coated polymer binder and particles per unit surface is within 10 to 17 g/m.sup.2 ; and a distribution of the sizes of the polymer particles is not more than 3.5 .mu.m in terms of standard deviation.

Abstract: A laser recording material is described, comprising a transparent glass base and a recording layer capable of writing and/or reading information by means of a laser, wherein said glass base has an undercoating layer between the glass base and the recording layer, comprising a carboxyl group-containing polymer or a maleic anhydride copolymer.

Abstract: A radiation image storage panel comprising a substrate and a fluorescent layer provided thereon and consisting essentially of a binder and a stimulable phosphor dipsersed therein. The binder comprises linear polyester resin or linear polyester resin crosslinked with a crosslinking agent. The panel exhibits improved physical properties.

Abstract: A laser recording material comprising a base, a polysiloxane coating film provided on at least one side of the base, said coating film being produced from a monomer represented by the formula:R.sub.x Si(OR').sub.4-xwherein all the symbols are defined in the specification. The material has reduced surface defects and improved focus-servocontrol, is free from formation of a precipitate, appearance of white turbidity or deformation, and does not undergo reduction of sensitivity or reflectance.

Abstract: A radiation image storage panel comprising a substrate, a fluorescent layer provided on the substrate and composed of a binder and a stimulable phosphor dispersed therein, and a protective layer provided on the fluorescent layer. The panel is edge-reinforced by coating the edge faces thereof with a polymer material comprising polyurethane or acrylic resin.

Abstract: A radiation image storage panel comprising a substrate and a fluorescent layer provided thereon and consisting essentially of a binder and a stimulable phosphor dispersed therein. The binder comprises linear polyester resin or linear polyester resin crosslinked with a crosslinking agent. The panel exhibits improved physical properties.

Abstract: A radiographic intensifying screen comprising a substrate and a fluorescent layer provided thereon and consisting essentially of a binder and a radioluminescent phosphor dispersed therein. The binder comprises linear polyester resin or linear polyester resin crosslinked with a crosslinking agent. The screen exhibits improved physical properties.

Abstract: A photographic element is described which is provided with a subbing layer comprising (1) a copolymer of a diolefin monomer and at least one vinyl monomer, and (2) a dichloro-2-triazine derivative.

Abstract: A subbing process for a photographic light-sensitive material is described comprising applying a polymer latex to a plastic film base, wherein said polymer is a copolymer composed of (1) a diolefin monomer, (2) at least one monovinyl monomer, and (3) at least one monomer having two or more vinyl groups, acryloyl groups, methacryloyl groups, or allyl groups excepting the diolefin monomer, and having a gel fraction of the polymer in the latex is from 50% to 95% by weight.

Abstract: A process for forming a subbing layer in photographic sensitive materials which comprises applying an aqueous dispersion of a copolymer consisting of at least one diolefin monomer and one or more vinyl monomers to a plastic film base in which the gel fraction of the copolymer in said aqueous dispersion is about 80% by weight or less.

Abstract: A light-sensitive material comprising a polyester film, the surface of the polyester film being subjected to a treatment to render the surface hydrophilic, a subbing layer on the treated surface comprising a polymer having carboxyl groups or groups which form carboxyl groups upon hydrolysis and an addition polymerizable monomer selected from the group consisting of acrylic acid, itaconic acid, hexahydro-1,3,5-triacryl-s-triazine, N,N'-bisacryloyl piperazine, diacetone acrylamide and hexamethylene bis-ethyleneureide and a silver halide emulsion layer on the subbing layer, whereby good adhesion between the polyester film and the coating layer is obtained.

Abstract: A photographic element which comprises a resin film or resin coated paper support having superimposed thereon a layer of a composition comprising a copolymer containing therein the moiety of the general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 each is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.