Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1986-10-10
1987-05-26
Louie, Won H.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430570, 430599, G03C 108
Patent
active
046686142
ABSTRACT:
An improvement in silver halide photographic light-sensitive materials having at least one silver halide emulsion layer on a support is disclosed. The improvement is that chemically sensitized silver halide grains contained in at least one of the emulsion layers have a distinct stratiform structure having substantially two parts comprising an inside core part and a shell part of the uppermost layer, wherein the inside core part of said grains is composed of silver halide containing 10 to 45% by mol of silver iodide, the shell part of the uppermost layer of the grains is composed of silver halide containing 5% by mol or less of silver iodide, and the emulsion containing silver halide grains having the distinct stratiform structure have an average silver iodide content of 7% by mol or more. The materials have high sensitivity, low fog and excellent graininess.
REFERENCES:
patent: 4444877 (1984-04-01), Koitabashi et al.
patent: 4477564 (1984-10-01), Cellone et al.
Hirsch, "Photographic Emulsion Grains with Coves," Part 1 and 2, Journal of Photo. Science, vol. 10, 1962, pp. 129-146.
Ishimaru Shingo
Ohshima Naoto
Takada Shunji
Fuji Photo Film Co. , Ltd.
Louie Won H.
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