Natural dyestuffs for gelatine capsules

Details Natural dyestuffs for gelatine capsules Natural dyestuffs for gelatine capsules

1979-07-13

1981-05-19

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Process of extracting or purifying of natural dye

8440, 8517, 8646, 260117, C09B 6100

Patent

active

042682657

ABSTRACT:
Process for stabilizing dyestuffs sensitive to light and/or oxidation, especially natural dyestuffs, by adsorption on a highly disperse adsorbent, whereby the dyestuff is immobilized, as well as the application of the process to dyestuffs which are determined for dyeing medicines, for instance gelatine capsules for medicinal purposes, cosmetics, food stuffs and animal feed.

REFERENCES:
patent: 1303426 (1919-05-01), Wall
patent: 1337673 (1920-04-01), Wall
patent: 4082660 (1978-04-01), Papirer et al.

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