Silver halide photographic emulsion prepared with silver halide

Details Silver halide photographic emulsion prepared with silver halide Silver halide photographic emulsion prepared with silver halide

1990-05-18

1992-07-28

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, 430600, 430603, 430611, 430613, G03C 1005

Patent

active

051340607

ABSTRACT:
A silver halide photographic emulsion containing silver halide grains having a silver chloride content of not less than 90 mol % and a method for preparing thereof are disclosed, wherein the silver halide grains are obtained by forming said silver halide grains in the presence of a water-soluble iridium compound and a nitrogen-containing heterocyclic compound capable of forming sparingly-soluble silver salt; and by controlling the addition of said iridium compound, whereby the photographic emulsion is improved in the dependence of gradation on exposure intensity.

REFERENCES:
patent: 4288535 (1981-09-01), Kanisawa et al.
patent: 4469783 (1984-09-01), Kuwabara et al.
patent: 4758504 (1988-07-01), Ohya et al.
patent: 4897342 (1990-01-01), Kajiwara et al.
patent: 4963466 (1990-10-01), Kajiwara et al.
patent: 5070008 (1991-12-01), Maekawa et al.
Patent Abstracts of Japan, vol. 10, No. 298 (P-505) (2354); Oct. 9, 1986, JPA-61-113056; May 30, 1986.

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