Related Experiment Video
Updated: Aug 10, 2026

Synthesis of Plant Phenol-derived Polymeric Dyes for Direct or Mordant-based Hair Dyeing
Published on: December 1, 2016
The myth of black henna
Ronni Wolf1, Batsheva Marcos, Edith Orion
1Dermatology Unit, Kaplan Medical Center, Rechovot, Israel. wolf_r@netvision.net.il
Abstract:
A 44-year-old woman presented with an eczematous, oozing eruption on her head, the back of her neck, and ears (Figure) that appeared one day after she had used a henna dye on her hair. She was aware of her allergy to permanent hair dyes, but her dermatologist approved of her use of natural dyes, such as henna. The dermatitis resolved within 1 week after she received an injection of combined betamethasone dipropionate 5 mg and betamethasone sodium phosphate 2 mg (Diprospan; Schering-Plough, Kenilworth, NJ).
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