Process for the preparation of high aspect ratio silver...

Details Process for the preparation of high aspect ratio silver... Process for the preparation of high aspect ratio silver...

G - Physics

03

C

96/112

G03C 1/005 (2006.01)

Patent

CA 1175701

-0- AN IMPROVED PROCESS FOR THE PREPARATION OF HIGH ASPECT RATIO SILVER BROMOIODIDE EMULSIONS Abstract of the Disclosure A process is disclosed of preparing radia- tion-sensitive tabular grain silver bromoiodide emul- sions. 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- 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.

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