2011 Fiscal Year Final Research Report
Invention of Novel Safe Hair Dyeing for Progress in Hair Colouring Science
| Project/Area Number |
21500732
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General human life sciences
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
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| Research Collaborator |
URAKAWA Hiroshi 京都工芸繊維大学, 工芸科学研究科, 教授
WATAOKA Isao 京都工芸繊維大学, 工芸科学研究科, 助教
MATSUBARA Takanori 京都工芸繊維大学, 工芸科学研究科, 博士後期課程学生
MORIMOTO Shota 京都工芸繊維大学, 工芸科学研究科, 博士前期課程学生
TANIGUCHI Saina 京都工芸繊維大学, 工芸科学研究科, 博士前期課程学生
YANO Asami 京都工芸繊維大学, 工芸科学研究科, 博士前期課程学生
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| Project Period (FY) |
2009 – 2011
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| Keywords | 生活素材 / 染毛科学 |
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| Research Abstract |
A novel colourant for hair dyeing was prepared by an enzymatic reaction with(+)-catechin and biobased materials, and their characteristics as a hair dyestuff were studied. The achievements are as follows :(1) The obtained orange or reddish orange colourant, named "catechinone", shows enough dyeability for decolourised white hair. The colour is controlled by the addition of biobased materials and a variety of colours of dyed hair are acquired.(2) Catechinone does not cause erythema or oedema on skin of rabbits. The fastness to washing or light(incl. UV) for hair dyed by catechinone is found to be high enough for practical use.(3) The chemical structure of catechinone and the formation mechanism were clarified.(4) The optimum conditions for obtaining catechinone at highest rate and max amount were determined for enzymatic, electrochemical and chemical techniques.(5) The production efficiency of catechinone was dramatically improved by a technique invented.(6) The technique by which hair is dyed black was invented.(7) The adsorption and penetration process of the dyestuff was clarified.(8) A technique dyeing hair by using extracts from tea leaves was invented.
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