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US 5,399,476 AGranted
Silver halide photographic emulsion and method of preparing the same
AssigneeFuji Photo Film Co., Ltd.
InventorMitsuhiro Uchida
Life of this patent
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Abstract
A silver halide photographic emulsion comprises silver halide grains to which an iridium compound was added during a preparation process. At least 5% by number of said silver halide grains have at least one intrafacial epitaxy limited in the neighborhood of the corners of a major plane of the grain, and the thickness of said epitaxy is 0.1 .mu.m or less.
Claims9
A silver halide photographic emulsion comprising silver halide grains, to which an iridium compound was added during a preparation process,
- wherein each grain has a major plane having corners, with a neighborhood of the corners being present,
- wherein at least 5% by number of said silver halide grains have at least one intrafacial epitaxy limited in the neighborhood of the corners of the major plane of the grain, and a thickness of said epitaxy is 0.1 .mu.m or less, and
- wherein said epitaxy has a surface index which is the same as that of the major plane, and epitaxies form only in a position which is limited to the neighborhood of the corners of the major plane of the grain.
Dependencies are inferred from the claim text.