Photographic elements in which gelatin silver halide layers cont

Details Photographic elements in which gelatin silver halide layers cont Photographic elements in which gelatin silver halide layers cont

1977-06-14

1980-07-29

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430630, G03C 172

Patent

active

042151961

ABSTRACT:
Abrasion marks by dry-friction and the tendency of producing pressure-scratches in photographic materials is reduced by incorporating in the gelatin silver halide emulsion layers polymeric compounds containing recurring units with semicarbazone or alkoxy carbonyl hydrazone groups in the side-chains. These recurring units are represented by one of the formulae: ##STR1## wherein: A is a single bond or --CONH-alkylene-, --COO-alkylene-, or phenylene,

REFERENCES:
patent: 2882156 (1959-04-01), Minsk
patent: 2972537 (1961-02-01), Laakso et al.
patent: 3740228 (1973-06-01), Ohlschlager et al.

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