Direct-positive silver halide emulsion fogged with a cyanoborohy

Details Direct-positive silver halide emulsion fogged with a cyanoborohy Direct-positive silver halide emulsion fogged with a cyanoborohy

1974-07-05

1976-04-20

Louie, Jr., Won H.

Gas separation: apparatus

Chromatography type apparatus

Having imbedded baffle or flow distributor

96108, G03C 128

Patent

active

039516563

ABSTRACT:
A method for chemically fogging a silver halide photographic emulsion comprising reacting cyanoborohydride anion with the silver halide thereby forming metallic silver. The cyanoborohydride is preferably in the form of an alkali metal salt. Additionally, the emulsion may optionally include a gold salt.

REFERENCES:
patent: 3361564 (1968-01-01), Bigelow et al.
patent: 3607288 (1971-09-01), Burt
patent: 3637392 (1972-01-01), Bigelow
patent: 3752674 (1973-08-01), Pritchett

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