| 摘要 |
PURPOSE:To dye a jelly with a colorant extracted from Rubia cordifolia into a brilliant red color having excellent heal resistance and light fastness. CONSTITUTION:A method for dyeing a jelly with a red colorant composition comprising a colorant and an alum compound, organic acid salt or carbonate salt, the colorant being prepared by hydrolyzing a colorant extracted from one kind or more of the root, tissue-cultured cells and hair-like root cultured product of Rubia cordifolia with water or a water-containing alcohol. The dyed jelly shows a brilliant light red color having excellent heat resistance and light fastness. |
