Silver halide precipitation process with deletion of...

Details Silver halide precipitation process with deletion of... Silver halide precipitation process with deletion of...

G - Physics

03

C

96/147

G03C 1/015 (2006.01)

Patent

CA 1153609

ABSTRACT OF THE DISCLOSURE An improved silver halide precipitation process of preparing a dispersion of silver halide grains is disclosed. The process comprises forming a radiation-sensitive silver halide dispersion by reacting silver and halide salts in solution within a dispering medium to form silver halide grain nuclei within the dispersing medium and allowing silver halide grain growth to occur in a reaction vessel in which the silver halide grain nuclei and the dispers- ing medium are present. The improvement comprises, during silver halide grain growth, withdrawing a portion of the dispersing medium from the reaction vessel through an ultrafiltration membrane while retaining the silver halide grains within the dis- persing medium remaining within the reaction vessel.

401723

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