Process for the preparation of high chloride (100) tabular grain

Details Process for the preparation of high chloride (100) tabular grain Process for the preparation of high chloride (100) tabular grain

1997-10-31

1999-01-12

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, G03C 1015, G03C 1035

Patent

active

058586385

ABSTRACT:
A process is disclosed of precipitating a high chloride {100} tabular grain photographic emulsion in which iodide incorporation in previously formed grain nuclei is relied upon to create the crystal lattice defects responsible for tabular grain growth. Undesirable dilution of the emulsion is avoided by replacing soluble iodide salt solution addition with iodine solution addition, allowing the volume of the iodine solution to be limited to less than 10 percent of the emulsion volume at the conclusion of tabular grain growth.

REFERENCES:
patent: 5264337 (1993-11-01), Maskasky
patent: 5292632 (1994-03-01), Maskasky
patent: 5320938 (1994-06-01), House et al.
patent: 5358842 (1994-10-01), Kasai et al.
patent: 5413904 (1995-05-01), Chang et al.

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