Abstract: Subbing layers in photographic films especially for polyester such as polyethylene terephthalate film supports comprise copolymers of 75 to 90 mole % of vinylidene chloride, 2 to 16 mole % of acrylonitrile or methacrylonitrile or a copolymerizable ester, e.g. methyl acrylate or vinyl acetate, 0.5 to 5 mole % of itaconic acid or a monoalkyl ester of itaconic acid wherein the alkyl group contains 1 to 4 carbon atoms and 3 to 8 mole % of acrylamide, methacrylamide or N-methylolacrylamide.

Abstract: light-sensitive photographic emulsion layers of photographic films are bonded directly, i.e. without an intermediate gelatin subbing layer, to a polymeric subbing layer containing adhesion-promoting particles of an inorganic oxide such as silica having a nominal particle size of 0.001 to 10 .mu.m and present in an amount 5 to 80% by weight. The polymeric subbing layer may be corona discharge treated before the application of the photographic emulsion layer. The subbing polymer may comprise a homopolymer or copolymer of styrene; a copolymer of butadiene; a copolymer of a vinyl ester; a polyester or copolyester; a polyurethane; a copolymer comprising an acrylic acid ester and/or a methacrylic acid ester; a copolymer of vinyl chloride; or a copolymer of vinylidene chloride. The preferred film support is a polyethylene terephthalate film.