Silver halide emulsion

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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430569, G03C 1035

Patent

active

058276394

ABSTRACT:
A novel silver halide emulsion containing a dispersing agent and silver halide grains is provided, characterized in that first tabular grains having a (100) plane as a main plane and an aspect ratio (diameter/thickness) of 1.5 or more whose shape on the main plane is a rectangular parallelogram having one to four corners non-equivalently missing account for 10% or more of all silver halide grains calculated in terms of projected area. In a preferred embodiment, 20% or more of the grains other than said first tabular grains calculated in terms of projected area is occupied by second tabular grains having a (100) plane as a main plane, an aspect ratio of 1.5 or more and the shape on the main plane of substantially a rectangular parallelogram.

REFERENCES:
patent: 4063951 (1977-12-01), Bogg
patent: 4386156 (1983-05-01), Mignot
patent: 4946772 (1990-08-01), Ogawa
patent: 5264337 (1993-11-01), Maskasky
patent: 5292632 (1994-03-01), Maskasky
patent: 5314798 (1994-05-01), Brust et al.
patent: 5320938 (1994-06-01), House et al.
patent: 5558982 (1996-09-01), Maskasky et al.
James, T. H. ed., The Theory of the Photographic Process, Macmillan Publishing Co, Inc., 1977, p. 89.

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