| 摘要 |
PCT No. PCT/DE81/00089 Sec. 371 Date Feb. 19, 1982 Sec. 102(e) Date Feb. 19, 1982 PCT Filed Jun. 11, 1981 PCT Pub. No. WO82/00035 PCT Pub. Date Jan. 7, 1982.A natural, edible dye, characterized by particular infrared and ultraviolet spectra and a method for its production, in which cell walls of the skins of colored beans of the genus Phaseolus, such as black beans, are destroyed, the released dye is extracted with water or an aqueous solution of a weak organic acid after weak acidulation, the obtained extract is separated from the skin residues, and the solution is concentrated and dried. The dye is used, in particular, for coloring foodstuffs and snack foods, beverages, pharmaceutical and cosmetic products, and for coloring textiles, paper and leather. |
