Silver halide photographic light-sensitive materials

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

1991-11-06

1993-08-31

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430445, 430448, 430571, 430558, 430611, 430523, G03C 106

Patent

active

052408264

ABSTRACT:
A novel silver halide photographic light-sensitive material having at least one silver halide photographic emulsion layer coated on at least one side of a support, wherein said photographic emulsion layer comprises a light-sensitive silver halide emulsion and said photographic emulsion or other layer(s) comprises a substantially light-insensitive, unfogged silver halide fine grain emulsion, with a heterocyclic mercapto compound represented by the following general formula (I) being adsorbed on the fine grains in said emulsion: general formula (I) ##STR1## wherein X represents --O--, --NH--, or --S--; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are a hydrogen atom or a substituent group; at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a substituted or unsubstituted alkyl or aryl group having up to 13 carbon atoms, such alkyl or aryl being bonded directly or through a divalent linkage group to the aromatic nucleus; X.sub.1 represents a hydrogen atom or a cation, such cation being required to neutralize the molecule.
The silver halide photographic light-sensitive material is a high-speed material which exhibits improved granularity, gradation and rate of development.

REFERENCES:
patent: 4607004 (1986-08-01), Ikenoue et al.
patent: 4657847 (1987-04-01), Ikeda et al.
patent: 4873181 (1989-10-01), Miyasaka et al.

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