Process of preparing a tabular grain silver bromoiodide emulsion

Details Process of preparing a tabular grain silver bromoiodide emulsion Process of preparing a tabular grain silver bromoiodide emulsion

1989-10-04

1991-10-29

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, G03C 102

Patent

active

050616161

ABSTRACT:
A process is disclosed for the preparation of a tabular grain silver bromoiodide emulsion in which silver bromoiodide laminae are formed on the major faces of the tabular grains. The sensitivity of the emulsion as a function of pressure applied is rendered more nearly constant by forming the silver bromoiodide laminae on the major faces of the tabular grains within a pAg and temperature range defined by Curve A in FIG. 1. The laminae are formed by first precipitating iodide as a silver salt at peripheral sites on the tabular grains and then precipitating silver bromoiodide onto the major faces of the host tabular grains with the primary source of iodide being the previously deposited iodide. The emulsions produced exhibit high sensitivity to exposing radiation and reduced sensitivity to localized pressure.

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Research Disclosure, vol. 229, Mar. 10, 1989, Item 29945.

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