Bleaching and dyeing; fluid treatment and chemical modification – Coating or sizing with dyeing process or product
Patent
1977-09-27
1981-06-23
Schofer, Joseph L.
Bleaching and dyeing; fluid treatment and chemical modification
Coating or sizing with dyeing process or product
8506, 8524, 427 3, 424 35, 106193D, D06P 358, A61K 4700, A61K 936
Patent
active
042748305
ABSTRACT:
A pharmaceutical tablet consists of a substrate containing a medicament and may be covered with a coating, said coating including a pigment comprising a natural water insoluble edible powder dyed with an edible natural dye. The pigment for coloring the tablet, or other pharmaceutical products, as well as food and cosmetics, is made by suspending a natural water insoluble edible powdered substrate in an aqueous vehicle and dyeing the suspended powdered substrate with an edible natural dye. The liquid is removed to obtain the dry pigment powder of the invention which then can be suspended in a suspending medium and used for coating products to be colored such as food, drug and cosmetic products.
REFERENCES:
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patent: 2925365 (1960-02-01), Nicholson
patent: 3054724 (1962-09-01), Raff
patent: 3162541 (1964-12-01), Battista
patent: 3475187 (1969-10-01), Kane
patent: 3576663 (1971-04-01), Signorino et al.
patent: 3802896 (1974-04-01), Westall et al.
patent: 3922339 (1975-11-01), Shear
patent: 3981984 (1976-09-01), Signorino
patent: 4056402 (1977-11-01), Guzi
Tisdale Canadian Textile Jour. Mar. 14, 1941, pp. 44-47.
Marshall Keith
Rosania Lawrence J.
Woznicki Edward J.
Colorcon, Inc.
Schofer Joseph L.
Tungol Maria S.
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