Support member for photographic printing paper

Details Support member for photographic printing paper Support member for photographic printing paper

1993-04-06

1993-11-02

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

428507, 428513, 428514, 430531, 430536, 430537, G03C 1775

Patent

active

052582779

ABSTRACT:
In the support member for photographic printing paper of the present invention, a white reflective layer is placed on a base material by coating and drying a coating composition, said coating composition contains a white pigment having titanium oxide as principal component and a binder having a copolymer of vinyl chloride - vinyl acetate and maleic acid anhydride soluble in organic solvent and having polymerization degree of 250 or more, said copolymer containing vinyl chloride, vinyl acetate and maleic acid anhydride by component ratio of 20-90 weight %: 5-50 weight %: 2-10 weight %. Thus, the support member can provide photographic image with high resolving power, has high bonding property with base material and silver halide emulsion layer, is easier to produce, and causes discoloring less frequently due to time or heat.

REFERENCES:
patent: 4220471 (1980-09-01), Date et al.
patent: 4921781 (1990-05-01), Takamuki et al.
patent: 5008150 (1991-04-01), Ashida et al.

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