Silver halide photographic materials

Details Silver halide photographic materials Silver halide photographic materials

1986-09-22

1988-11-22

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430605, 430569, 430567, G03C 108

Patent

active

047865881

ABSTRACT:
A water-soluble silver salt and a water-soluble halide are reacted to obtain silver halide particles, and these are, after being demineralized, transhalogenated by adding thereto a water-soluble bromide in an amount of 0.1 mol % to 7 mol % of the total silver halide amount just before or during the sulfur sensitization, to obtain a sulfur-sensitized silver halide emulsion of high sensitivity. The present photographic materials contain the sulfur-sensitized silver halide emulsion and have high sensitivity and excellent pressure characteristics. The transhalogenation along with the sulfur sensitization is effective for the improvement of the sensitivity and the pressure characteristics of the materials.

REFERENCES:
patent: 3501313 (1970-03-01), Willems et al.
patent: 3503749 (1970-03-01), Tavernier et al.
patent: 3622329 (1971-11-01), Huckstadt et al.
patent: 3772031 (1973-11-01), Berry et al.
patent: 4067740 (1978-01-01), Bigelow
patent: 4075020 (1978-02-01), Saleck et al.
patent: 4210450 (1980-07-01), Corben
patent: 4286055 (1981-08-01), Forster et al.

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