Photographic silver halide materials containing light-absorbing

Details Photographic silver halide materials containing light-absorbing Photographic silver halide materials containing light-absorbing

1980-02-15

1981-09-08

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

432510, 430595, 542444, G03C 184

Patent

active

042885345

ABSTRACT:
For absorbing light of the whole visible spectral region in a silver halide emulsion layer or in an antihalation layer of a photographic material it suffices to use a 2-pyrazolin-5-one pentamethine oxonol dye corresponding to the formula: ##STR1## wherein R is a C.sub.1 -C.sub.5 alkyl group. The dyes are used in dispersed form in at least one light-sensitive silver halide emulsion layer or in an antihalation layer.

REFERENCES:
patent: 3441563 (1969-04-01), Weissel et al.
patent: 3512983 (1970-05-01), Watanabe et al.
patent: 3647460 (1972-03-01), Hofman et al.
patent: 3865817 (1975-02-01), Kobayashi et al.
patent: 3876429 (1975-04-01), Poppe et al.

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