Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1993-06-16

1994-09-20

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, 430543, 430544, 430599, 430966, G03C 114

Patent

active

053488490

ABSTRACT:
A silver halide photographic material comprising a support and at least one light-sensitive silver halide emulsion layer coated on at least one side of the support, wherein the silver halide grains contained in the silver halide emulsion layer have been subjected to reduction-sensitization, and the silver halide emulsion contains at least one spectral sensitizer represented by Formula (I), as defined in claim 1. At least one of the dyes represented by Formula (II), as defined in claim 1, is added to the silver halide emulsion after chemical sensitization or reduction sensitization, but before coating. The addition amount of the dye represented by Formula (I) is 5.times.10.sup.-4 to 3.times.10.sup.-3 mol per mol of silver halide and the addition amount of the dye represented by Formula (II) is 1.times.10.sup.-5 to 1.times.10.sup.-3 mol per mol of silver halide, provided that the addition amount of the dye of Formula (I) is more than that of the dye of Formula (II). Such a silver halide photographic material increases the sensitivity while significantly lowering the amount of fog.

REFERENCES:
patent: 3769024 (1973-10-01), Sakazume et al.
patent: 3953215 (1976-04-01), Hinata et al.
patent: 3957490 (1976-05-01), Libeer et al.
patent: 4797354 (1989-01-01), Saitou et al.
patent: 5075198 (1991-12-01), Katoh
patent: 5114838 (1992-05-01), Yamada
patent: 5254456 (1993-10-01), Yamashita et al.

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