Process for preparing monodispersed silver halide emulsions

Details Process for preparing monodispersed silver halide emulsions Process for preparing monodispersed silver halide emulsions

1994-06-10

1995-08-01

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430944, 430567, G03C 1005, G03C 1035, G03C 516

Patent

active

054379717

ABSTRACT:
A process for preparing a monodispersed silver halide grain emulsion characterized in that said process comprises the steps of:
(a) forming silver halide nuclei with single jet precipitation by adding a watersoluble silver salt solution to a reaction vessel containing a water-soluble halide salt solution in a hydrophilic colloid at a pCl of from 1.0 to 2.0 and at a temperature lower than 80.degree. C., said water-soluble silver salt solution being added in an amount of from 0.1 to 15% by weight of silver relative to the total silver,
(b) stabilizing said silver halide nuclei to seed crystals for at least six minutes at a temperature lower than 80.degree. C. and at pCl of from 1.5 to 3.0 by Ostwald ripening, and
(c) growing said seed crystals by double jet precipitation of silver and halide salt solutions at a constant chloride ions excess of from 30 to 70% mol and a temperature lower than 80.degree. C.

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patent: 5178998 (1993-01-01), Maskasky et al.

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