Silver halide emulsion containing two equivalent type coupler fo

Details Silver halide emulsion containing two equivalent type coupler fo Silver halide emulsion containing two equivalent type coupler fo

1975-09-22

1977-08-16

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

96 566, 96100R, G03C 700, G03C 140

Patent

active

040423930

ABSTRACT:
This invention relates to a method for developing an exposed silver halide color photosensitive material which comprises conducting the development in the presence of the following compound: ##STR1## wherein Cp is a cyan coupler residue having been removed one hydrogen atom from active methylene of the coupler; R.sub.1 and R2 are individually hydrogen, helogen, a substituted or unsubstituted group selected from an aliphatic hydrocarbon residue, an aromatic hydrocarbon residue, acyl, carbamoyl, cyans and formyl; X is a substituted or unsubstituted group selected from an aliphatic hydrocarbon residue, an aromatic hydrocarbon residue, a heterocyclic ring residue, and a carbonyl group; and n is 0 or 1 provided that, when n is 1, X is the carbonyl group.

REFERENCES:
patent: B351673 (1975-01-01), Fleckenstein et al.
patent: 3737316 (1973-06-01), Salminen et al.
patent: 3942987 (1976-03-01), Landholm et al.

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