Everlasting-wave and hair-straightening preparations use a chemical, ammonium thioglycolate, to launch hair from its natural established. Hair colorants use permanent or semipermanent dyes to incorporate colour to dull or mousy-coloured hair, and hydrogen peroxide is used to bleach hair into a blond colour. " This broad definition involves any substance https://connerdjnsx.wikifrontier.com/7635319/kosmetika_an_overview