Silver halide photographic material and process for producing th

Details Silver halide photographic material and process for producing th Silver halide photographic material and process for producing th

1990-07-27

1992-03-17

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, G03C 1035, G03C 1005

Patent

active

050968068

ABSTRACT:
A silver halide photographic material comprising a support, and at least one silver halide emulsion layer containing silver halide grains on the support, wherein the silver halide grains have an internal area formed in at least one corner of the grains, the internal area having a silver iodide content higher than the silver iodide content of the circumferential area of the grains. A process for producing a silver halide photographic material which comprises the steps of: (1) adding a first solution containing iodide ions to a second solution containing silver iodobromide host grains; (2) adding the third solution containing silver ions to the mixture from step (1) to form silver halide grains wherein the silver halide grains have (a) an internal area formed in a corner, the internal area having a silver iodide content higher than the silver iodide content of the circumferential area of the grains; and (b) more than 95% of the total projected area of the silver halide grains is tabular silver halide grains, the tabular silver halide grains having (i) two sheets of twin planes parallel to the principal plane, and (ii) a monodisperse size distribution.

REFERENCES:
patent: 4349622 (1982-09-01), Koitabashi et al.
patent: 4463087 (1984-07-01), Maskasky
patent: 4806461 (1989-02-01), Ikeda et al.
patent: 4917996 (1990-04-01), Matsuzara et al.

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