Photographic silver dye bleach materials containing formyl-subst

Details Photographic silver dye bleach materials containing formyl-subst Photographic silver dye bleach materials containing formyl-subst

1983-11-14

1986-03-11

Higel, Floyd D.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Bleaching

430224, 430225, 430235, 430236, 430560, 534770, 534851, 534829, C09B 29085, C09B 31043, G03C 544, C03C 552

Patent

active

045754829

ABSTRACT:
Photographic materials which comprise, on a base, at least one layer containing an azo dyestuff of the formula ##STR1## in which R.sub.1 is hydrogen, an alkylsulfone, halogen, cyano or nitro, R.sub.2 is hydrogen, halogen, cyano or nitro, R.sub.3 is hydrogen, alkyl, halogen, cyano or nitro, B.sub.1 is an aromatic ring system, K.sub.1 is an aromatic amine and m.sub.1 is 1 or 2.

REFERENCES:
patent: 3751406 (1973-08-01), Bloom
patent: 4105655 (1978-08-01), Gottschlich et al.

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