PROBLEM TO BE SOLVED: To provide a method for extracting unknown active ingredients contained in chestnut bark and leaves although the practical use of ingredients contained in the astringent coat of a chestnut and active on human bodies is known.SOLUTION: Refined flour of astringent coat with chestnut flesh containing more active ingredients than before can be produced by a method of soaking dried chestnut astringent coat in an aqueous solution that contains active ingredients extracted by boiling chestnut barks and leaves in a pot. A secondary processed product containing refined flour of astringent coat with chestnut flesh of higher functionality can thereby be produced.COPYRIGHT: (C)2014,JPO&INPIT【課題】栗渋皮に含まれる人体に有効な成分の活用が知られているが、また知られていない栗の樹皮や葉っぱに含まれる有効成分の抽出方法を発明した。【解決手段】栗の樹皮や葉っぱを釜ゆでして抽出した有効成分を多く含む水溶液に乾燥させた栗渋皮を漬け込むこと方法によってこれまで以上の有効成分を含む栗果肉付き渋皮精粉を製造出来るようになったことで、より機能性の高い栗果肉付き渋皮精粉入りの二次加工製品を製造出来るようになる。【選択図】図1
