- Before using henna, perform a color test on a strand. - It is recommended to wait a month before applying to chemically treated hair (permanent, straightening, bleaching, etc.).- It is not indicated for coloring eyelashes and eyebrows.- Does not cover white hairs.- Avoid contact with eyes. Attention: The use of Henne Color is not recommended on hair that has more than 30%-40% white hair. Bleaching after using Henne Color is not recommended. Also, dyeing with Henne Color black is not recommended unless you have black or dark brown hair. Hair Dyes