Silver halide photographic light-sensitive materials

Details Silver halide photographic light-sensitive materials Silver halide photographic light-sensitive materials

1991-12-04

1993-08-10

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430573, 430578, 430583, 430584, 430587, 430588, 430592, G03C 110

Patent

active

052348067

ABSTRACT:
The present invention provides dyes markedly excellent as sensitizing dyes for silver halide photographic light-sensitive materials. Said dyes are represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 may be identical or different and each represents an alkyl group, an aralkyl group, an alkenyl group or an aryl group, R.sub.3 represents a heterocyclic group, Z.sub.1 and Z.sub.2 may be identical or different and each represents a group of atoms necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring, X represents a counter ion, L.sub.1 to L.sub.5 each represents a methine group, and m and n each represents 0, 1 or 2.

REFERENCES:
patent: 4266003 (1981-05-01), Ikeda et al.
patent: 4965183 (1990-10-01), Mee et al.

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