▎ 摘　　要

NOVELTY - Plant based hair dye comprises first emulsion and second emulsion, where first emulsion comprises 50-100 pts. wt. plant pigment liquid, and 0.01-10 pts. wt. graphene oxide, and second emulsion comprises 0.5-1.5 pts. wt. metal salt. The emulsion is gel or emulsion agent. USE - Plant based hair dye. ADVANTAGE - The plant based hair dye is safe, eco-friendly, not easy to fade and rich luster, has higher uniformity and good film forming property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing plant based hair dye, which involves: (A) preparing plant pigment solution; (B) preparing graphene oxide; (C) including plant pigment solution and graphene oxide, stirring them uniformly to obtain first emulsion; and (D) adding metal salt to obtain second emulsion, mixing to obtain final product.