Photographic coated film bases

Claim 1

A light-sensitive photographic film, which comprises a self-supporting plastics film, a copolymeric subbing layer applied to at least one surface of said film and a light-sensitive photographic emulsion layer bonded directly to the copolymeric subbing layer, said copolymeric subbing layer comprising a copolymer prepared from a comonomer mixture consisting essentially of 35 to 55 mole % acrylic acid or a lower alkyl ester thereof in which the alkyl group comprises up to 8 carbon atoms, 35 to 55 mole % methacrylic acid or a lower alkyl ester thereof in which the alkyl group comprises up to 8 carbon atoms, and 1 to 15 mole % of itaconic acid or itaconic anhydride and 0 to 8 mole % of additional monomer selected from the class consisting of acrylamide, methacrylamide, N-methylol acrylamide, N-ethanol acrylamide, N-propanol acrylamide, N-methylol methacrylamide, N-ethanol methacrylamide, N-methyl acrylamide, N-tertiary-butyl acrylamide, acrylonitrile, halo-substituted acrylonitrile, methacrylonitrile, and dimethylaminoethyl methacrylate, and said copolymeric subbing layer having a dry coat weight in the range 0.05 to 3.00 mg/dm 2 and being applied from an aqueous dispersion having a pH in the range 2.0 to 5.0.