Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1997-03-17
1999-08-03
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, G03C 1005
Patent
active
059324082
ABSTRACT:
A silver halide emulsion comprising at least a dispersion medium and silver halide grains is disclosed, wherein the silver halide grains comprise tabular grains having, as the main planes, {100} planes and having an aspect ratio (diameter/thickness) of 1.5 or more, in a proportion of 10% or more of the sum of the projected areas of all the grains, and the tabular grains each has at least one discontinuous halogen composition gap plane in their central part in such a way that the gap involves at least a difference of from 10 to 100 mol % in terms of the Cl.sup.- content or the Br.sup.- content or a difference of from 5 to 100 mol % in terms of the I.sup.- content between the adjacent layers. The reproducibility of the emulsion is good. The emulsion has high sensitivity, good graininess and good ability of forming high-quality photographic images.
REFERENCES:
patent: 5264337 (1993-11-01), Maskasky
patent: 5275930 (1994-01-01), Maskasky
patent: 5314798 (1994-05-01), Brust et al.
patent: 5320938 (1994-06-01), House et al.
patent: 5413904 (1995-05-01), Chang et al.
patent: 5756276 (1998-05-01), Shirai
Chea Thorl
Fuji Photo Film Co. , Ltd.
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