The Product is a new hair-care product in a formula Luxurious Chinese herbal medicines,developed by Lichen international research center based on the characteristics of hair of oriental,combininginternational advanced biological hair-care technology with secret recipe of traditional Chinese medicine extraction.5mins dye your hair and last up to 4 weeks.Strengthen and nourish the hair and hair root.Give the hair a darker with a silky and shiny look.