Silver halide emulsion and photographic light-sensitive material

Details Silver halide emulsion and photographic light-sensitive material Silver halide emulsion and photographic light-sensitive material

1995-01-09

1995-12-26

Baxter, Janet C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, G03C 1035

Patent

active

054787173

ABSTRACT:
An emulsion contains tabular silver halide having a thickness of less than 0.5 .mu.m, a diameter of 0.3 .mu.m or more, and a grain diameter/thickness ratio of 2 or more. The tabular silver halide grains account for at least 50% of a total projected area of all silver halide grains. 50% (number) or more of the tabular silver halide grains include 10 or more dislocations per grain. A relative standard elevation of silver iodide content of individual tabular silver halide 30% or less. This light-sensitive silver halide emulsion has a high sensitivity and a high gamma improved in photographic properties and in rate of development. Each tabular silver halide grain may internally have a portion where a silver iodide content is higher than that of the surface of the grain. When the light-sensitive silver halide emulsion is added to a silver halide emulsion layer, a photographic light-sensitive material having a high sensitivity and a high gamma and improved in photographic properties and in rate of development can be obtained.

REFERENCES:
patent: 4414306 (1983-11-01), Wey et al.
patent: 4414310 (1983-11-01), Daubendiek et al.
patent: 4433048 (1984-02-01), Solberg et al.
patent: 4434226 (1984-02-01), Wilgus et al.
patent: 4439520 (1984-03-01), Kofron et al.
patent: 4459353 (1984-07-01), Maskasky
patent: 4665012 (1987-05-01), Sugimoto et al.
patent: 4806461 (1989-02-01), Ikeda et al.
patent: 4835095 (1989-05-01), Ohashi et al.
patent: 5242791 (1993-09-01), Hirano et al.

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