Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1996-02-21

1997-04-01

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430592, G03C 122

Patent

active

056164564

ABSTRACT:
A silver halide photographic material containing a methine compound containing a thiohydantoin ring substituted by a pyrazinyl group at the 3-position, which has high sensitivity, high reproducibility, good storage stability, and leaves hardly color on unexposed areas after being processed. Example General formula: ##STR1## wherein Z represents a group of atoms necessary to form a five- or six-membered nitrogen-containing heterocyclic ring; R.sub.1 represents an alkyl group; R.sub.2 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group; R.sub.3 represents a pyrazinyl group; L.sub.1 and L.sub.2 each represents a methine group; and n represents 0 or an integer of 1 to 3.

REFERENCES:
patent: 4266003 (1981-05-01), Ikeda et al.
patent: 4513081 (1985-04-01), Okazaki et al.

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