Process for preparation of photographic film involving corona tr

Details Process for preparation of photographic film involving corona tr Process for preparation of photographic film involving corona tr

1976-09-16

1979-01-23

Welsh, John D.

Gas separation: apparatus

Electric field separation apparatus

Electrode retaining or supporting means

427 39, 96 85, G03C 178

Patent

active

041359321

ABSTRACT:
Photographic film bases and sensitized photographic films are produced by coating a supporting film with an aqueous dispersion or a solution in an organic solvent of an essentially water-insoluble homopolymer and/or copolymer of styrene and/or a styrene derivative to form an adherent polymeric subbing layer which is then subjected to a surface modifying, e.g. corona discharge, treatment. Light-sensitive photographic emulsions adhere directly to the treated subbing layer without the need for an intermediate gelatin subbing layer.

REFERENCES:
patent: 3630742 (1971-12-01), Crawford
patent: 3697305 (1972-10-01), Tatsuta et al.
patent: 3751280 (1973-08-01), Nerurkar et al.

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