Fecha de publicación: 14/06/2022 Fuente: Wipo "olive oil" The invention discloses a preparation method of hair dye based on Chinese herbal medicines, which is characterized in that the hair dye comprises the following raw materials: 10-25% of polygonum multiflorum, 10-25% of achyranthes bidentata and 1-5% of glycerol. 1-5% of olive oil; 1-5% of a grape seed extract; 5-10% of hyaluronic acid; the invention relates to an anti-wrinkle mask which comprises the following components in percentage by weight: 5-10% of collagen, 0.1-1% of glycyrrhizin, 0.1-0.5% of zinc gluconate, 1-20% of acrylate polymer, 0.5-2% of fumed silica, 1-10% of butanediol, 5-10% of lubricant, 1-5% of toner, 10-25% of semen cuscutae, 10-25% of fructus psoraleae, 10-25% of black sesame and 10-25% of prepared ginger. The hair-blackening hair dye completely replaces the existing chemical hair-blackening hair dye, does not contain toxins, and is harmless to human hair after being used for a long time.