Process for the production of photosensitive silver halide emuls

Details Process for the production of photosensitive silver halide emuls Process for the production of photosensitive silver halide emuls

1990-10-10

1992-12-08

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, G03C 1005

Patent

active

051697505

ABSTRACT:
An improved process for preparing silver halide emulsions by precipitation of silver halide grains in a single reaction vessel comprising a dispersing medium is disclosed. The process comprises forming a silver halide emulsion by adding silver salt and halide salt solutions in a dispersing medium contained in a reaction vessel to form silver halide nuclei and allowing said silver halide nuclei to grow in said reaction vessel. The improvement comprises, during a pause of addition of silver salt and halide salt solutions, reducing the volume of silver halide emulsion by continuously delivering the silver halide emulsion to a cleaning stage for the partial removal of dispersing medium and any salt soluble therein and returning the silver halide emulsion to the reaction vessel.

REFERENCES:
patent: 4334012 (1982-06-01), Mignot
patent: 4336328 (1982-06-01), Brown et al.
patent: 4539290 (1985-09-01), Mumaw
patent: 4758505 (1988-07-01), Hoffman
Research Disclosure Mar. 1975, 13122.
Research Disclosure 10208--Oct. 1972.
Research Disclosure 13577--Jul. 1975.
Research Disclosure 16351--Nov. 1977.

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