Subbed polycarbonate film base photographic article

Claim 1

A PHOTOGRAPHIC FILM ELEMENT COMPRISING A FILM BASE FORMED OF A HIGH-MOLECULAR-WEIGHT POLY(DI-MONOHYDROXYARYL) ALKANE CARBONATE) SUPPORTING A SILVER HALIDE GELATIN EMULSION LAYER THAT IS BONDED TO THE SAID FILM BASE BY AN INTERPOSED SUBBING LAYER FORMED OF A COMPOSITION OF THE GROUP CONSISTING OF (A) COMPOSITIONS COMPRISING (1) GELATIN AND (2) PARTIALLY HYDROLYZED COPOLYMERS OF VINYL CHLORIDE AND VINYL ACETATE CONTAINING BETWEEN ABOUT 45 AND ABOUT 70 PERCENT BY WEIGHT OF COPOLYMERIZED VINYL CHLORIDE, BETWEEM ABOUT 10 AND ABOUT 40 PERCENT BY WEIGHT OF COPOLYMERIZED VINYL ACETATE, AND BETWEEN ABOUT 5 AND ABOUT 30 PERCENT BY WEIGHTH OF COPOLYMERIZED VINYL ALCOHOL, THE SAID PARTIALLY HYDROLYZED COPOLYMERS BEING PRESENT IN AMOUNTS BETWEEN ABOUT 3 TO ABOUT 15 PARTS BY WEIGHT TO EACH 10 PARTS BY WEIGHT OF GELATIN WHICH COMPOSITION HAD BEEN APPLIED TO THE BASE FILM AT A PH BETWEEN 2 AND 5, AND (B) COMPOSITIONS COMPRISING MIXTURES OF (1) MIXED ACETALS OF POLYVINYL ALCOHOLS OF WHICH BETWEEN 50 AND 70% OR THE HYDROXYL GROUPS ARE ACETALIZED WITH MIXTURES OF AT LEAST TWO ALDEHYDES, ONE OF WHICH IS AN AROMATIC ALDEHYDE, THE AROMATIC NUCLEUS OF WHICH CONTAINS A SUBSTITUENT OF THE GROUPS CONSISTING OF CARBOXY AND SULFO RADICALS, THE AMOUNTS OF THE AROMATIC ALDEHYDE BEING BETWEEN 20 AND 50 MOL PERCENT OF THE TOTAL MIXTURE OF ALDEHYDES, AND (2) PARTIALLY SAPONIFIED COPOLYMERS OF VINYL CHLORIDE AND ESTERS OF VINYL ALCOHOL AND CARBOXYLIC ACIDS WHICH CONTAIN BETWEEN 10 AND 40 PERCENT BY WEIGHT OF COPOLYMERIZED VINYL CHLORIDE, BETWEEN 45 AND 70 PERCENT BY WEIGHT OF COPOLYMERIZED VINYL ALCOHOL AND BETWEEN 5 AND 30 PERCENT BY WEIGHT OF COPOLYMERIZED ESTERS OF VINLY ALCOHOL AND CARBOXYLIC ACIDS, SAID PERCENTS BY WEIGHT TOTALLING 100 PERCENT BY WEIGHT, THE SAID MIXTURES CONTAINING BETWEEN ABOUT 0.2 TO ABOUT 1 PART BY WEIGHT OF THE PARTIALLY SAPONIFIED COPOLYMER TO EACH PART BY WEIGHT OF THE ACETAL.