Methods for producing photographic silver halide emulsions

Details Methods for producing photographic silver halide emulsions Methods for producing photographic silver halide emulsions

1996-09-06

1997-11-25

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430600, 430613, G03C 107, G03C 1035

Patent

active

056911289

ABSTRACT:
A method for producing a silver halide emulsion having a silver chloride content of 50 mol % or more and containing silver halide grains in which (111) faces occupy 30% or more of their surface area, wherein said silver halide grains are formed in the presence of a pyridinium salt crystal habit modifier, and a thiocyanate and a sensitizing dye are added prior to a washing step of emulsion production, thereby removing the crystal habit modifier out of the emulsion to eliminate the side effect caused thereby and to improve photographic characteristics.

REFERENCES:
patent: 4983508 (1991-01-01), Ishiguro et al.
patent: 5260183 (1993-11-01), Ishiguro et al.

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