Ronald Dale Strong

US Patent:

44143109, Nov 8, 1983

Filed:

Sep 30, 1982

Appl. No.:

6/429587

Inventors:

Richard L. Daubendiek - Rochester NY
Ronald W. Strong - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 102

US Classification:

430567

Abstract:

A process is disclosed of preparing radiation-sensitive tabular grain silver bromoiodide emulsions. This is achieved by providing in a reaction vessel an emulsion comprising a dispersing medium and high iodide silver halide grains. The mean diameter of the silver halide grains is less than 0. 1 micron, and the concentration of iodide is less than 10. sup. -2 mole per liter of the emulsion. Upon concurrently running into the reaction vessel silver and bromide, a high aspect ratio tabular grain silver bromoiodide emulsion is obtained.