Patent ID: 6455238
Filing Date: 2002-09-24
Classification: G03C,Y10S

Abstract:
A method of main a photographic imaging element having a protective overcoat thereon, comprising the following steps:(a) forming a coating composition comprising a water insoluble polymer dissolved homogeneously in a solvent mixture, said solvent mixture comprising at least one solvent which is a relatively good solvent for said water-insoluble polymer and at least one solvent which is a relatively poor solvent for said water-insoluble polymer, said relatively poor solvent having a higher boiling point than said relatively good solvent, (b) applying the coating composition to a substrate comprising at least one silver-halide light-sensitive emulsion layer and a support; (c) drying the coated substrate to remove substantially all of the solvents to obtain a photographic element having a open-pore membrane, whereby the minimum porosity of the open-pore membrane is 20 percent.