Preparation of photographic material

Details Preparation of photographic material Preparation of photographic material

1978-02-09

1979-02-20

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 82, 96 84R, 96100R, 96109, 96111, 96113, 96114, 961145, 96120, 96130, G03C 176, G03C 140, G03C 102

Patent

active

041405307

ABSTRACT:
Photographic additives in particular water insoluble photographic additives are rendered easier to incorporate into photographic layers by finely dividing them, mixing them with a finely divided water soluble substance and preparing granules of the mixture using a hydrophilic colloid as the binder. The granules which contain from about 1 to 50% by weight of the photographic additives are then dissolved in the coating composition and this disperses the water insoluble additive uniformly throughout the coating composition.

REFERENCES:
patent: 2852381 (1958-09-01), Minsk et al.
patent: 3287134 (1966-11-01), Kainrath et al.
patent: 3660101 (1972-05-01), Owens et al.
patent: 3676147 (1972-07-01), Boyer et al.
patent: 4006025 (1977-02-01), Swank et al.

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