Polyphenolization: Hair Browning by Phenolic Adhesion, Ambient Oxygen, and Transition Metals

June 2025 in “ OPAL (Open@LaTrobe) (La Trobe University) ”

Eunu Kim (10583127), Jungwoo Hong (20093862), Jinjae Lee (21462569), Hee-Seung Lee (1291350), Haeshin Lee (1311306)

polyphenol coating oxidation dimeric 1,2,4-benzenetriol diBTO keratin Cu(II) ions cysteine polyphenol copper ions

TLDR A new hair dye method uses polyphenols and oxidation to create a long-lasting brown color on gray hair.

This study explores a novel hair dyeing method using polyphenol coating and oxidation, similar to apple browning, to achieve a nonwashable brown color on gray hair. The synthetic polyphenol, dimeric 1,2,4-benzenetriol (diBTO), forms a stable layer on hair keratin that resists washing. The oxidation process, enhanced by ambient oxygen and Cu(II) ions, deepens the brown color. Cysteine on the hair surface aids in the rapid application of polyphenols. This method offers a practical solution for maintaining hair color with regular shampooing, reducing the need for long exposure times typical of professional hair dyeing.

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Polyphenolization: Hair Browning by Phenolic Adhesion, Ambient Oxygen, and Transition Metals

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