Process for the preparation of high chloride tabular grain...

Details Process for the preparation of high chloride tabular grain... Process for the preparation of high chloride tabular grain...

G - Physics

03

C

G03C 1/005 (2006.01) G03C 1/07 (2006.01) G03C 1/015 (2006.01)

Patent

CA 2055354

AN IMPROVED PROCESS FOR THE PREPARATION OF HIGH CHLORIDE TABULAR GRAIN EMULSIONS Abstract of the Disclosure An improved process is disclosed of preparing a high chloride tabular grain emulsion. The concentration of thiocyanate ion in the dispersing medium at nucleation and during grain growth is relied upon to favor the formation of {111} crystal faces. The concentration of chloride ion in the thiocyanate ion containing dispersing medium is relied upon to produce the grain twinning necessary for tabular grain formation.

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