63 citations
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February 2017 in “ACS biomaterials science & engineering” Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.
October 2024 in “UNESP Institutional Repository (São Paulo State University)” This study evaluated the effects of ammonium thioglycolate and amino methylpropanol alkaline straighteners followed by permanent dyeing on hair fibers. Using techniques like FTIR, DSC, SEM, confocal and fluorescence microscopy, and others, the research found that both straightening and dyeing caused changes to the hair cuticle and cortex. Specifically, there was oxidation of surface bands and denaturation of alpha-keratin chains in the cortex. The study highlights the physical and chemical changes in hair fibers due to these cosmetic procedures, emphasizing the importance of understanding these effects for maintaining healthy hair.
5 citations
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June 2013 in “Fashion business” Rosehip extract improves hair wave, thickness, and color vibrancy.
72 citations
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July 2003 in “Journal of cosmetic dermatology” Frequent hair coloring and styling can damage hair and cause breakage or loss.
1 citations
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December 2022 in “Middle East Journal of Science” Permanent hair dyes use chemicals that react with hydrogen peroxide to create color.