November 2025 in “International Journal of Biological Macromolecules” This eco-friendly hair dye method improves hair health and color durability.
6 citations
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October 2003 in “Journal of applied polymer science” A new method using poly(ethylene imine) improves hair dyeing at lower temperatures with better color retention.
5 citations
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January 2004 in “Journal of applied polymer science” Urea helps hair dye penetrate better and last longer.
December 2025 in “Sustainable Chemistry One World” Mangosteen waste can be used as an eco-friendly natural hair dye, producing a lasting reddish color and strengthening hair.
September 2011 in “Daehan miyong hakoeji” Henna orange powder, especially with alkali, protects and colors hair better than oxidizing colorants.