Fogged, direct positive silver halide emulsions containing a ble

Details Fogged, direct positive silver halide emulsions containing a ble Fogged, direct positive silver halide emulsions containing a ble

1973-09-28

1976-01-20

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96101, 96109, 96107, 96108, G03C 524, G03C 136, G03C 134, G03C 128

Patent

active

039334988

ABSTRACT:
Direct positive silver halide materials based on the Herschel effect having substantially reduced sensitivity to room light exposure contain a heterocyclic compound to prevent white light bleaching along with a second heterocyclic compound to prevent latent image formation due to white light exposure.

REFERENCES:
patent: 3050395 (1962-08-01), Duffin
patent: 3062651 (1962-11-01), Hillson
patent: 3526507 (1970-09-01), Ishikawa et al.
patent: 3679424 (1972-07-01), Barbier et al.
patent: 3782957 (1974-01-01), Ohkubo et al.

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