High bromide emulsions containing a restricted high iodide epita

Details High bromide emulsions containing a restricted high iodide epita High bromide emulsions containing a restricted high iodide epita

1996-08-30

1997-12-16

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430570, 430604, 430605, G03C 1035, G03C 109, G03C 110

Patent

active

056983875

ABSTRACT:
A photographic emulsion is disclosed comprised of a dispersing medium and radiation-sensitive grains with greater than 50 percent of total grain projected area being accounted for by tabular grains comprised of (1) a tabular host portion containing greater than 50 mole percent bromide, based on silver, and having spaced parallel {111} major faces, (2) a first epitaxial phase containing greater than 90 mole percent iodide, based on silver, accounting for less than 60 percent of total silver and overlying from 15 to 90 percent of the major faces, and (3) surface silver halide of a face centered cubic crystal lattice structure overlying at least a portion of the first epitaxial phase.

REFERENCES:
patent: 5604086 (1997-02-01), Reed et al.

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