US 5,478,716 AGranted

Silver halide photographic emulsion containing silver iodobromide grains having two or more twin planes and light-sensitive silver halide color photographic material

AssigneeKonica Corporation

InventorsTadanobu Sekiya, Yasuo Honta, Syoji Matsuzaka

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Abstract

A silver halide emulsion is provided, which comprises silver halide twinned-crystal grains and satisfy the following requirements (1) and (2): (1) the longest distance between twin planes is within the range of 10 to 100 .ANG. on the average, (2) said silver halide grains each comprise a core comprising silver iodobromide having a silver iodide content of not less than 7 mol % and a shell comprising one or more layers different in halide composition from each other, in which at least one layer of the shell comprises silver iodobromide or silver bromide, the outermost layer having a silver iodide content of 0 to 4 mol %.

Claims8

Dependent claims

A silver halide emulsion comprising a dispersion medium and light-sensitive silver halide grains, wherein said silver halide grains in said emulsion consist essentially of grains having two or more twin planes and satisfying the following requirements:

(1) the average longest distance between twin planes is 10 to 100 .ANG.,
(2) said silver halide grains have an average iodide content of at least 3 mol %, and each comprises a core and a shell, wherein said core contains silver iodobromide having a silver iodide content of not less than 7 mol %;
and said shell comprises one layer or two or more layers different in halide composition from each other, wherein at least one layer of said shell comprises silver iodobromide or silver bromide, the outermost layer of said shell having a silver iodide content of 0 to 4 mol %.

Dependencies are inferred from the claim text.