High chloride tabular grain emulsions and processes for their pr

Details High chloride tabular grain emulsions and processes for their pr High chloride tabular grain emulsions and processes for their pr

1997-10-21

1999-03-23

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, G03C 1035

Patent

active

058857621

ABSTRACT:
Photographically useful radiation-sensitive high chloride {100} tabular grain emulsions containing iodide are disclosed. A high proportion of the {100} tabular grains contain crystal lattice dislocations extending inwardly from their peripheral edges. The dislocations are created by introducing elemental iodine into a high chloride {100} tabular grain emulsion, reducing the iodine to iodide, displacing chloride ions at the peripheral edges of the tabular grains with iodide ions, and then continuing growth of the high chloride {100} tabular grains. The dislocations in the peripheral and, particularly, corner regions of the tabular grains increase their sensitivity.

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