April 2026 in “Cosmetics” This study developed and tested a shampoo with semi-permanent dyes designed to gradually cover gray hair, reporting maintained stability and effective gray–black coloration on high-canities hair tresses through eight wash cycles.
January 2023 in “Fashion and textiles” This study found that hair dyed with anionic basic hair dye lost more color after shampooing compared to cationic and nonionic dyes, with alkaline shampoo increasing this effect.
November 2016 in “University of the Arts London Research Online (University of the Arts London)” This study concluded that adding polymeric conditioning actives to shampoos improved color retention in permanently dyed hair, while additional cationic dyes at certain pH levels weakly dyed the hair directly.
84 citations
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April 2015 in “Cosmetics” This review discusses various types of hair dyes, their mechanisms of action, molecular structures, application methods, and formulation aspects, but reports no new research findings.
6 citations
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March 2015 in “Journal of The American Academy of Dermatology” This article discusses the diagnostic challenges of evaluating hair and scalp conditions in patients using hair dye, emphasizing how dyes can mimic different pathologies and lead to contact dermatitis.
