A Novel Hair Dyeing Technology Using Melanin Precursor Prepared by an Aspergillus Tyrosinase
Melanin is a natural black pigment existing in human hair. It cannot be used as a dyestuff for hair coloring because the molecule is too large to penetrate into hair. In biological processes, melanin is generated from an amino acid, tyrosine, or from dihydroxyphenylalanine (DOPA) by oxidation and polymerization reactions of oxidative enzymes, such as tyrosinase. There are some intermediates, called melanin precursors, formed in the course of melanin production. These precursors are easily converted to melanin by air oxidation without enzymes or other catalysts. These molecules are useful for dyestuffs because their sizes are small. Therefore, we have established a new bioconversion process with an Aspergillus Tyrosinase for production of dihydroxyindole, a melanin precursor, and a novel coloring technology for gray hair coverage has been developed from this. This coloring system is basically equal to the natural process, and its aim is to restore the original color to gray hair without hair damage. This coloring system was recently applied and launched as a mens product in Japan.
hair melanin color gray dye
KOIKE Kenzo HATA Yoji
Beauty Research Center, Kao Corporation, Tokyo, 131-8501, Japan Research Institute, Gekkeikan Sake Company, Kyoto, 612-8385, Japan
国际会议
The 12th International Wool Research Conference(第十二届国际羊毛会议12th IWRC)
上海
英文
257-260
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）