Silver halide precipitation process with deletion of materials t

Details Silver halide precipitation process with deletion of materials t Silver halide precipitation process with deletion of materials t

1981-06-11

1982-06-22

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430642, 210650, 366184, G03C 102

Patent

active

043363288

ABSTRACT:
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 dispersing 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 dispersing 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 dispersing medium remaining within the reaction vessel.

REFERENCES:
patent: 3790386 (1974-02-01), Posse et al.
patent: 3801326 (1974-04-01), Claes
patent: 3897935 (1975-08-01), Forster et al.
patent: 4046576 (1977-09-01), Terwilliger et al.
patent: 4147551 (1979-04-01), Finnicum et al.
patent: 4171224 (1979-10-01), Verhille et al.
Research Disclosure, vol. 102, Oct. 1972, Item 10208.
Research Disclosure, vol. 131, Mar. 1975, Item 13122.

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