Method of preparing photographic silver halide emulsions

Details Method of preparing photographic silver halide emulsions Method of preparing photographic silver halide emulsions

1974-04-25

1976-05-18

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Electrode retaining or supporting means

96109, 96110, G03C 102, G03C 124, G03C 130

Patent

active

039574903

ABSTRACT:
Silver halide emulsions are prepared by silver halide precipitation in the presence of a reducing agent, physical ripening and, if desired, chemical ripening wherein subsequent to the addition of reducing agent and before the grains have reached their final size an oxidizing agent is added to the emulsion. By means of the reducing and oxidizing agents, the gradation and photosensitivity characteristics of the emulsion can be controlled at will.

REFERENCES:
patent: 3507657 (1970-04-01), Kitze
patent: 3531291 (1970-09-01), Bacon
patent: 3672901 (1972-06-01), Ohkubo et al.
F. Degering, Editor, An Outline of Organic Chemistry, Fourth Edition, Barnes & Noble; N. York, 1943.

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