Method for producing silver halide photographic light-sensitive

Details Method for producing silver halide photographic light-sensitive Method for producing silver halide photographic light-sensitive

1994-11-02

1995-11-21

Baxter, Janet C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430600, 430603, 430611, 430614, G03C 1015, G03C 134

Patent

active

054686024

ABSTRACT:
A method for producing silver halide photographic light-sensitive material is disclosed. The method comprises the steps of (1) forming silver halide crystal nuclei, (2) growing the nuclei to form a silver halide emulsion, (3) chemically sensitizing the silver halide emulsion with a selenium compound, and (4) coating and drying the silver halide emulsion on a support, and a compound represented by formula I is added to the silver halide emulsion during the time between the moment of completion of the nuclei forming step and the moment of completion of the chemically sensitizing step. ##STR1## In the formula R.sub.1 is a hydrogen atom, a straight or branched alkyl group, a cycloalkyl group, an alkenyl group, an aralkyl group, an alkoxyl group, an aryl group, a heterocyclic group, a carbamoyl group, a thiocarbamoyl group or a sulfamoyl group; R.sub.2 and R.sub.3 are each independently a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group, a cyano group, an alkylthio group, an arylthio group, alkylsulfoxido group, an alkylsulfonyl group or a heterocyclic group, and the groups each represented by R.sub.2 and R.sub.3 may be combined with each other to form a benzene ring.

REFERENCES:
patent: 4224403 (1980-09-01), Toda et al.
patent: 5059516 (1991-10-01), Sato et al.
patent: 5153116 (1992-10-01), Metoki et al.
patent: 5240824 (1993-08-01), Takada et al.
patent: 5273871 (1993-12-01), Takada et al.
patent: 5342741 (1994-08-01), Morimoto et al.

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