Silver halide photographic emulsion and silver halide photographic light-sensitive material
AssigneeFuji Photo Film Co., Ltd.
InventorsSadanobu Shuto, Hideo Ikeda, Takefumi Hara
Life of this patent
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Abstract
A silver halide photographic emulsion contains tabular silver halide grains having an aspect ratio of 2 or more in an amount of 70% or more of a total projected area of all grains. A variation coefficient of the grain size distribution of all silver halide grains is 20% or less, a signal having at least two peaks is present in a diffraction angle range of less than 1.5 degree at a maximum peak height.times.0.13 of a (420) X-ray diffraction signal obtained using the K.sub..alpha. line of Cu, and a peak interval thereof is 0.1 degree or more in terms of the diffraction angle.
Claims11
A silver bromoiodide photographic emulsion comprising tabular silver bromoiodide grains having an aspect ratio of 2 or more in an amount of 70% or more based on a total projected area of all grains, wherein a variation coefficient of the grain size distribution of all silver halide grains in said emulsion is 10% or less, and the silver iodide content of the silver bromoiodide emulsion is 5 mol % or less, said emulsion exhibiting, under X-ray diffraction analysis with the K.sub..alpha. line of Cu, a (420) X-ray diffraction signal having at least two peaks and a peak interval of at least 0.1 degree in terms of the diffraction angle, and wherein said peaks are present, measuring at 13% of a maximum peak height, within a 1.4 degree diffraction angle range.
An emulsion comprising silver halide grains dispersed in gelatin, said silver halide grains comprising silver bromoiodide tabular grains having a silver iodide content of 3 mol % or less and an aspect ratio of 2 or more, said tabular grains accounting for at least 70% of all of the grains in the emulsion, based on projected surface area,
- said emulsion exhibiting, under X-ray diffraction analysis with the K.sub..alpha. line of Cu, a (420) X-ray diffraction signal having two peaks with a peak interval therebetween in the range of 0.1 to 1.3 degrees in terms of the diffraction angle, and wherein said peaks are present, measuring at 13% of a maximum peak height, within a 1.4 degree diffraction angle range, and
- wherein a variation coefficient of the grain size distribution of all silver halide grains in said emulsion is 10% or less.
Dependencies are inferred from the claim text.