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Patent Searching and Data


Title:
SILVER HALIDE PHOTOGRAPHIC EMULSION
Document Type and Number:
Japanese Patent JPH03153235
Kind Code:
A
Abstract:

PURPOSE: To prevent the degradation in sensitivity after preservation of the emulsion with the laps of time without impairing a corrosion preventive effect by incorporating silver halide emulsions chemically sensitized in the presence of a palladium compd. and further specific compd.

CONSTITUTION: The silver halide particles chemically sensitized in the presence of the palladium compd. at ≥10-4 mol per 1mol silver halide are incorporated into the emulsion. Further, at least one kind of the compds. expressed by formula I are incorporated into the emulsion. In the formula I, R1 denotes a hydrogen atom, alkyl group, alkenyl group, aralkyl group, etc.; R2, R3 respectively denote a hydrogen atom, alkyl group, aryl group, cyano group, alkylsulfonyl group, etc.; R4, R5 respectively denote a hydrogen atom, alkyl group, aryl group, aralkyl group. The palladium compd. refers to a bivalent or quadrivalent palladium salt. Thus, the degradation in the sensitivity of the emulsion after the preservation with the laps of time is prevented without impairing the corrosion preventive effect.


Inventors:
ABE RYUJI
Application Number:
JP29337089A
Publication Date:
July 01, 1991
Filing Date:
November 10, 1989
Export Citation:
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Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
G03C1/06; G03C1/09; (IPC1-7): G03C1/06; G03C1/09