Thioindioxyl azo dye developer for diffusion transfer process

Details Thioindioxyl azo dye developer for diffusion transfer process Thioindioxyl azo dye developer for diffusion transfer process

1974-11-08

1976-12-28

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 3, 96 29D, 96 77, 96 99, G03C 700, G03C 140, G03C 176, G03C 110

Patent

active

039999912

ABSTRACT:
A dye developer for silver halide photography comprising both a dye moiety represented by the following general formula (I): ##STR1## wherein R represents a halogen atom or an alkyl group containing 1 to 4 carbon atoms; k is an integer of from 0 to 4; A represents an acyl group containing 1 to 4 carbon atoms or an alkoxyacyl group containing from 2 to 4 carbon atoms; Ar represents an aromatic nucleus; X represents a halogen atom, an alkyl group, an alkoxy group, an acyl group or an acyloxy group, each containing 1 to 4 carbon atoms and l is an integer of from 0 to 4; and a polyhydric phenol moiety having silver halide developing activity.

REFERENCES:
patent: 3255001 (1966-06-01), Blout et al.
patent: 3307947 (1967-03-01), Idelson et al.

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