Silver halide photographic emulsion and silver halide photographic lightsensitive material using the same
AssigneeFuji Photo Film Co., Ltd.
InventorsMakoto Kikuchi, Mikio Ihama
Life of this patent
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Abstract
A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains with epitaxial junction meeting the requirements (i) to (v): (i) silver iodochlorobromide grains having (111) faces as main planes and having two parallel twin planes, (ii) an equivalent circle diameter of 3.0 μm or more and an aspect ratio of 8 or more, (iii) each of host tabular grains has six silver halide epitaxial junction portions selectively in apex portions thereof, (iv) at least one of the silver halide epitaxial junction portions has at least one dislocation line, and (v) a spacing between the two parallel twin planes of 0.012 μm or less.
Claims16
A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains with epitaxial junction meeting the requirements (i) to (v):
- (i) silver iodochlorobromide grains having (111) faces as main planes and having two parallel twin planes;
- (ii) an equivalent circle diameter of 3.0 μm or more and an aspect ratio of 8 or more;
- (iii) each of host tabular grains has six silver halide epitaxial junction portions selectively in apex portions thereof;
- (iv) at least one of the silver halide epitaxial junction portions has at least one dislocation line;
- and
- (v) a spacing between the two parallel twin planes of 0.012 μm or less.
Dependencies are inferred from the claim text.