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The indophenol group, with various substituents in place of OH and various ring substitutions, is found in many dyes used in hair coloring and textiles. [3] Indophenol is used in hair dyes, lubricants, redox materials, liquid crystal displays, fuel cells and chemical-mechanical polishing. It is an environmental pollutant and is toxic to fish ...
On average, a person can inhale up to 17 milligrams of potentially harmful chemicals in a single hairstyling session, according to the research. 'Alarming' amount of chemicals inhaled from hair ...
A woman with dyed pink hair. Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads.The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching.
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An elderly Bengali man in Dhaka with a beard dyed in henna. Henna is a reddish dye prepared from the dried and powdered leaves of the henna tree. [1] It has been used since at least the ancient Egyptian period as a hair and body dye, notably in the temporary body art of mehndi (or "henna tattoo") resulting from the staining of the skin using dyes from the henna plant.
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Because of the chemical nature of hair dye strippers, they are effective on both newly dyed hair and older dye. Note that this type of color correction is ineffective on hair lightened with hydrogen peroxide, as hair bleaching is an irreversible chemical reaction that oxidizes hair's melanin, effectively rendering it colorless. [3] Most color ...
Researchers know that Black women use chemical hair relaxers the most—a 20-year study by Boston University’s Black Women’s Health found that about 95% of the 52,000 Black women surveyed used ...