PROBLEM TO BE SOLVED: To provide a method for dyeing a keratin fiber which brings about little damage or poisoning of hair and scalp, and excels in dyeing properties, and a dyeing agent for keratin fiber.SOLUTION: A method for dyeing a keratin fiber includes using an oxidation dye, and an oxidase which can oxidize the oxidation dye wherein the isoelectric point of the oxidase is greater than 6.5. The dyeing agent for keratin fiber used therefor is also provided.COPYRIGHT: (C)2013,JPO&INPIT【課題】毛髪や頭皮の損傷、かぶれが少なく、且つ染色性に優れたケラチン繊維の染色方法及びケラチン繊維用染色剤を提供する。【解決手段】酸化染料と当該酸化染料を酸化できるオキシダーゼを用いるケラチン繊維の染色方法であって、オキシダーゼの等電点が6.5より大きいことを特徴とするケラチン繊維の染色方法及びこれに用いるケラチン繊維用染色剤である。【選択図】なし
