Black-and-white photographic elements and processes

Details Black-and-white photographic elements and processes Black-and-white photographic elements and processes

1977-06-13

1978-11-21

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 60BF, 96 61R, 96 76R, 96 95, 96100R, G03C 526, G03C 106, G03C 140

Patent

active

041264614

ABSTRACT:
Photographic elements for providing black-and-white images contain a silver halide emulsion having associated therewith a non-diffusible resorcinol coupler and a color developing agent or a precursor of a color developing agent. The elements can be processed by simple alkaline activation. Since image density is derived at least in part from the resorcinol coupler, lower silver halide coverages can be employed or the silver can be recovered, or both.

REFERENCES:
patent: 2181944 (1939-12-01), Kleine
patent: 2189817 (1940-02-01), Morris
patent: 2310982 (1943-02-01), Meschter
patent: 2333106 (1943-11-01), Kendall et al.
patent: 2443909 (1948-06-01), Hanson et al.
patent: 3497350 (1970-02-01), Yutzy et al.
patent: 3622629 (1971-11-01), Lugosy
patent: 3674490 (1972-07-01), Matejec
patent: 3770431 (1973-11-01), Gates et al.
patent: 3772014 (1973-11-01), Scullard
patent: 3929486 (1975-12-01), Habu et al.

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