Direct-positive silver halide emulsions

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

1973-07-09

1976-05-18

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 94R, 96107, 96108, G03C 524, G03C 102, G03C 128

Patent

active

039575187

ABSTRACT:
Direct-positive silver halide emulsions comprising fogged silver halide grains and having adsorbed to the surface of said grains an electron-acceptor have improved stability and speed when subsequent to fogging of said grains and addition of the said electron-acceptor the pH of the emulsion is lowered, preferably below pH 6.

REFERENCES:
patent: 2717833 (1955-09-01), Wark
patent: 3501305 (1970-03-01), Illingsworth
patent: 3560213 (1971-02-01), Hunt
patent: 3647455 (1972-03-01), Burt et al.
patent: 3672900 (1972-06-01), Kurz
patent: 3717466 (1973-02-01), Florens et al.
patent: 3772030 (1973-11-01), Gilman et al.
patent: 3782957 (1974-01-01), Ohkubo et al.

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