关键词: 儿茶色素, 膜分离, 染发

Abstract:

This paper reported that PVDF membrane separation method showed satisfactory efficiency on the purification of natural Catechu pigment. Taking purified natural Catechu as main raw material, this study inspected the impacts of dyeing temperature, time, pH value, and mordant concentration on dyeing to white yak hair. The results showed that this natural pigment for white yak hair dyeing performed a direct effect. Temperature was the most important factor. Zinc ion could dye hair maroon, while hair color turned to be black under iron ion and copper iron. Temperature and concentration of mordant were important factors.

Key words: Catechu, membrane separation, dye