Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1996-04-19
1998-01-13
Huff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, 430966, G03C 1035, G03C 1015
Patent
active
057077932
ABSTRACT:
A silver halide emulsion is disclosed which comprises at least dispersing medium and silver halide grains, wherein the silver halide grains have an AgCl content of from 30 mol % to 100 mol %; at least 30% of the sum of the projected area of the silver halide grains accounts for tabular grains which satisfy the following conditions (i) to (v): (i) the tabular grains have {100} faces as major faces; (ii) the tabular grains have an aspect ratio (circle-equivalent diameter/thickness) of from 2.0 to 25; (iii) the tabular grains have an average thickness of from 0.02 .mu.m to 0.3 .mu.m; (iv) the tabular grains have an average major face edge length ratio of from 1 to 5; and (v) intermediate grains which have grown to the extent that the average projected area thereof is about 75% of that of the tabular grains have two dislocation lines extending from a nucleus the intermediate grains have, and an angle made by the two dislocation lines is from 5.degree. to 85.degree..
The tabular grains for use in this invention is excellent in the anisotropic growing property, shows a very slow growing speed in the thickness direction and is excellent in the uniformity amount the grains and the silver halide emulsion is excellent in the sensitivity, the graininess, and spectral sensitization characteristics.
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patent: 5413904 (1995-05-01), Chang et al.
Journal of Crystal Growth 23 (1974) 207-213, A. Mignot, E.Francois et M. Catinat.
Fuji Photo Film Co. , Ltd.
Huff Mark F.
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