Abstract: A photographic silver halide light-sensitive material having at least one hydrophilic colloid layer containing gelatin and/or a gelatin derivative hardened with a compound represented by the following general formula (I): ##STR1## wherein a and d each represents 1 or 2; b and c each represents 0, 1 or 2 with the proviso that both b and c are not simultaneously 0; R represents a divalent group; and n is 0 or 1, which compound provides a preferred hardening rate and does not adversely affect the photographic properties of photographic light-sensitive materials, and a method of hardening gelatin and/or a gelatin derivative comprising treating the gelatin and/or the gelatin derivative with a compound represented by the general formula (I) above.

Abstract: A photographic silver halide light-sensitive material having at least one hydrophilic colloid layer containing (a) gelatin and/or a gelatin derivative and (b) at least one compound represented by the following general formula (I) or (II): ##STR1## wherein Y represents a vinyl group; A represents a divalent group; R, which may be the same or different, each represents a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms; and n is 0 or 1. The compounds of the general formulas (I) and (II) are novel class of gelatin hardeners which are particularly suitable for use in silver halide photographic light-sensitive materials.

Abstract: A method of subbing plastic films, particularly for use in photography, comprising applying an aqueous subbing composition to a surface thereof, the aqueous subbing composition comprising a polymer prepared from 45 to 99.5% by weight of at least one monomer selected from the group consisting of vinylidene chloride and vinyl chloride; 0.1 to 15% by weight of at least one monomer selected from vinyl monomers having one or more alcohol groups in their side chains; and 0 to 54.4% by weight of at least one monomer selected from the group consisting of acrylates, methacrylates, acrylonitrile, methacrylonitrile, alkyl vinyl esters, and alkyl vinyl ethers.

Abstract: a silver halide photographic photosensitive material in which at least one of the hydrophilic colloid layers thereof contains an organic sulfonic acid composition comprising at least one of the compounds represented by the general formula (I)a -- so.sub.3 m (i)wherein A represents a monovalent residue of an unsaturated hydrocarbon having one double bond and containing 8 to 18 carbon atoms, and M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, an ammonium group or an alkylammonium group; and at least one of compounds represented by the general formula (II) ##STR1## wherein B represents a monovalent residue of a saturated hydrocarbon containing 6 to 16 carbon atoms, n is 1, 2 or 3, and M has the same meanings as M in the above general formula (I).