Flocculating agent for photographic emulsions

Details Flocculating agent for photographic emulsions Flocculating agent for photographic emulsions

1976-09-16

1978-05-02

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

Electrode retaining or supporting means

96114, 210 54, G03C 102, G03C 172, C02B 120

Patent

active

040872823

ABSTRACT:
A method of flocculating a gelatin-silver halide photographic emulsion, which comprises flocculating the silver halide with gelatin at a pH of 6 or less in the presence of a polymer consisting essentially of recurring units represented by General Formula (Ia) or (Ib): ##STR1## in which R.sup.1 and R.sup.2, which can be the same or different, represent aliphatic groups, R.sup.3 represents a hydrogen atom, an aliphatic group, an aryl group or an aralkyl group, X represents --O-- or --NH--, M represents a cation and X and R.sup.3 may linked to each other to form a cyclic amino group.

REFERENCES:
patent: 2772165 (1956-11-01), Moede

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