PROBLEM TO BE SOLVED: To provide a method for producing an azuki (red beans) bean-color coloring agent in which not only many functional components remain, which has highly-functional added values but also which has fine coloring properties at low cost, in a simple production process.SOLUTION: The method for producing an azuki bean-color coloring agent includes concentrating clear supernatant liquid, obtained by adding enzyme to azuki bean cooking liquid for separation of insoluble substance using membrane, while leaving many functional components, and promoting oxidative polymerization by spraying the pigment of the concentrated liquid or a method equivalent to spraying.COPYRIGHT: (C)2009,JPO&INPIT【課題】 機能性成分の多くが残り機能性付加価値が高いばかりでなく、より簡便な製造工程で低コスト、着色性のより小豆色色付け剤を製造する。【解決手段】 小豆煮汁に酵素を添加して不溶性物質を分離した上澄み液を、膜を用いて機能性成分を多くを残したまま濃縮し、この濃縮液の色素を噴霧またはそれに相当する方法で酸化重合を促進させる。【選択図】 図1
