Silver halide photographic emulsion containing predominantly sil

Details Silver halide photographic emulsion containing predominantly sil Silver halide photographic emulsion containing predominantly sil

1985-10-28

1989-09-05

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, 430583, 430588, 430576, 430603, 430607, G03C 110, G03C 116, G03C 118, G03C 134

Patent

active

048638439

ABSTRACT:
A silver halide photographic emulsion comprising as major constituent silver bromide with improved gradation, density and sensitivity and decreased fog is disclosed. This emulsion contains at least one of the compounds represented by the general formula ##STR1## wherein Z represents an aromatic radical, or of the oxidized derivatives thereof, and at least one of the compounds represented by the general formula ##STR2## wherein A represents a hydroxyl group, an amino group, ##STR3## R.sub.1 and R.sub.2 form a ring jointly with the carbon atom to which R.sub.1 and R.sub.2 are attached or one of R.sub.1 and R.sub.2 represents a hydrogen atom and the other represents a hydrogen atom, an alkyl group, an aryl group, or a hydroxyl group; n is 0 or an integer of 1 to 8, and M represents a hydrogen atom or an alkali metal.

REFERENCES:
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patent: 4175966 (1979-11-01), Fujiwhara et al.
patent: 4336321 (1982-06-01), Kanada et al.
patent: 4410619 (1983-10-01), Kubbota et al.
patent: 4419433 (1983-12-01), Kubbota et al.
T. H. James, The Theory of the Photographic Process, 4th edition, pp. 398-399, 1977.

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