Direct-positive silver halide emulsions

Details Direct-positive silver halide emulsions Direct-positive silver halide emulsions

1975-08-26

1978-02-14

Louie, Jr., Won H.

Gas separation: apparatus

Chromatography type apparatus

96108, 96110, 96120, G03C 130, G03C 128

Patent

active

040736520

ABSTRACT:
A method is described of increasing the stability of direct-positive silver halide emulsions comprising reduction- and gold-fogged silver halide grains by the step of adding to the emulsion subsequent to the fogging, a sulphite and a gold compound.

REFERENCES:
patent: 3615610 (1971-10-01), Florens et al.
patent: 3672903 (1972-06-01), Chang
patent: 3736140 (1973-05-01), Collier et al.
Cotton, et al., Advanced Inorganic Chemistry, 2nd Edition, Interscience Publishers, N. Y., 1969, pp. 550-552.

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