Aofatang plant hair dye is a natural pigment extracted from edible and medicinal plants. Clinical tests show that it is harmless to human health. The product has also won awards and certifications from authoritative organizations. Hair dye is a cosmetic for dyeing hair. Divided into temporary, semi-permanent and permanent hair dyes. Hair dyes generally contain carcinogen p-phenylenediamine. Experts say that p-phenylenediamine is a colorant that must be used in hair dyes and is an internationally recognized carcinogen.