| 摘要 |
WATER-SOLUBLE COLORANT FOR FOOD PRODUCTS A water-insoluble dye, such as indigo, is combined in its soluble leuco form, in aqueous solution, with a water-soluble food grade substrate such as starch. After oxidizing to convert the dye to its water-insoluble, colored, form, the aqueous solution is dried to provide a dry, water-soluble food colorant comprising the substrate dyed with the water-insoluble dye. The product is conveniently provided in particulate form such as by spray drying, and finds particular use in dry beverage mixes where a water-soluble colorant is desired. |
