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By: TOM BRANNA

Editor

  Editor: I am a consultant in cosmetics based in the UK. I have been consulting for the last 10 years since leaving Clairol and before that working for Unilever. One of my specialist areas is hair coloring and I read your article “A Colorful History” in the latest on-line edition of Happi. The early days of coloring based on oxidative chemistry and (many) synthetic organic chemicals are interesting and a little unclear. What is clear, however...

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