Method of dispersing organic compounds useful in photography

Details Method of dispersing organic compounds useful in photography Method of dispersing organic compounds useful in photography

1974-11-13

1977-05-03

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Electrode retaining or supporting means

96 84R, 96 87A, 96 95, 96107, 96109, 96111, 961142, 961144, 961145, 96126, E03C 102, E03C 128

Patent

active

040212475

ABSTRACT:
A method for dispersing organic compounds which are substantially insoluble in water and are used in photographic materials, such as chemical sensitizers (except spectral sensitizing dyes), antifoggants, antioxidants, ultraviolet absorbents, color couplers, coating aids, hardening agents, etc., effectively in a silver halide photosensitive emulsion comprising dissolving the organic compounds in an acid having a pKa of not over about 5, such as methanesulfonic acid, ethanesulfonic acid, etc., and adding the solution to the silver halide photosensitive emulsion directly or after dispersing in an aqueous solution.

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patent: 3373115 (1968-03-01), Steppan
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patent: 3676124 (1972-07-01), Ohkubo
patent: 3676136 (1972-07-01), Mowrey
patent: 3713833 (1973-01-01), Lindholm
patent: 3788857 (1974-01-01), Van Poucke
patent: 3822135 (1974-07-01), Sakai
patent: 3963499 (1976-06-01), Shiba et al.

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