Silver halide photographic emulsions

Details Silver halide photographic emulsions Silver halide photographic emulsions

1983-06-03

1984-09-04

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, 430600, 430603, 430605, G03C 102, G03C 106

Patent

active

044697830

ABSTRACT:
A silver halide photographic emulsion is described, which has halogen composition comprises at least 60 mole % of silver chloride, 40 mole % or less of silver bromide, and 5 mole % or less of silver bromide. Grain formation is performed in the presence of a silver halide solvent selected from the group consisting of tetrasubstituted thioureas and organic thioethers, and from 10.sup.-8 to 10.sup.-5 mole of a water-soluble iridium compound per mole of silver halide. This photographic emulsion exhibits high sensitivity and provides high contrast even by flash exposure. Thus, it is useful for the production of light-sensitive materials to be used in the production of printing plates in accordance with photographic engraving.

REFERENCES:
patent: 3615579 (1971-10-01), Bigelow
patent: 3901713 (1975-08-01), Yamasue et al.
patent: 4269927 (1981-05-01), Atwell
patent: 4284717 (1981-08-01), Toya et al.
patent: 4288535 (1981-09-01), Kanisawa et al.

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