Double-jet precipitation process for preparation of tabular...

G - Physics – 03 – C

Patent

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G03C 1/005 (2006.01) G03C 7/30 (2006.01)

Patent

CA 1175691

-0- IMPROVED DOUBLE-JET PRECIPITATION PROCESSES AND PRODUCTS THEREOF Abstract of the Disclosure A double-jet precipitation process is disclosed for preparing radiation-sensitive photo- graphic emulsions containing tabular silver chloride grains which are substantially internally free of bromide and iodide. In forming the emulsions chloride and silver salt solutions are concurrently run into a dispersing medium while controlling both pH and pAg, Tabular grain having an average aspect ratio of greater than 8:1 are obtained.

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