TLDR Hair dyes vary in how long they last and how deeply they penetrate hair.
The document from 2015 detailed the history, composition, and mechanisms of action of various hair dyes, categorizing them into oxidative and non-oxidative types with subdivisions based on color durability: temporary, semipermanent, demipermanent, and permanent. It explained how temporary dyes do not penetrate the hair cortex and last until the first wash, while semipermanent dyes last up to six washes due to their higher affinity for hair keratin. Demipermanent dyes combine semipermanent molecules with oxidation dye precursors for greater durability. The document also covered the chemical composition of hair and dye penetration pathways, discussing cationic, metallic, vegetable, and permanent oxidative dyes. Permanent oxidative dyes, comprising 80% of the market, use complex chemical reactions for durable color coverage. The study emphasized understanding these mechanisms to select the best dye for different hair types, ensuring effective color application with minimal damage. Financial support from FAPESP was acknowledged, with no conflicts of interest declared.
25 citations,
January 2013 in “Colloids and surfaces. B, Biointerfaces” Hair dye colors mainly target melanin granules in black hair.
44 citations,
January 2010 in “International journal of trichology” Choosing the right shampoo for your hair type is crucial.
72 citations,
July 2003 in “Journal of cosmetic dermatology” Frequent hair coloring and styling can damage hair and cause breakage or loss.
40 citations,
February 2002 in “International Journal of Dermatology” Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.
150 citations,
July 2001 in “Clinics in dermatology” Proper haircare and communication with doctors are key to managing hair loss and avoiding damage.
June 2021 in “Journal of emerging technologies and innovative research” Onion and Aloe vera can help protect hair from damage caused by hair dyes.
1 citations,
December 2022 in “Middle East Journal of Science” Permanent hair dyes use chemicals that react with hydrogen peroxide to create color.
1 citations,
May 2023 in “Frontiers in medicine” Hair dyes and perms can damage hair and scalp, but using interventions can reduce harm.
47 citations,
January 2013 in “Indian Journal of Dermatology, Venereology and Leprology” Premature graying of hair may suggest health issues and currently lacks effective treatments.
5 citations,
February 2022 in “Acta Biomaterialia” Nanomaterials can improve hair care products and treatments, including hair loss and alopecia, by enhancing stability and safety, and allowing controlled release of compounds, but their safety in cosmetics needs more understanding.
