Bleaching and dyeing; fluid treatment and chemical modification – Nontextile – dyeing process or product – including inorganic... – Cellulose substrate other than paper
Patent
1982-01-06
1984-10-09
Tungol, Maria Parrish
Bleaching and dyeing; fluid treatment and chemical modification
Nontextile, dyeing process or product, including inorganic...
Cellulose substrate other than paper
8646, 426250, 426540, D06P 360
Patent
active
044759193
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:
patent: 3162541 (1964-12-01), Battista
patent: 4263333 (1981-04-01), Maing et al.
Marshall Keith
Rosania Lawrence J.
Woznicki Edward J.
A. Earley John F.
Colorcon, Inc.
Tungol Maria Parrish
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