Tint shampoo with Argan oil covers gray hair by 100% Convenient: Easy to use just like using a regular shampoo Time Saver: A small amount of shampoo gives you Black and shiny hair in just 8 minutes. Cost Saver: Compared to the expensive cost of dyeing hair in a salon. Long lasting on hair. How to use : Wear the gloves included in the product package. Press the pump at the top of the can to release the shampoo. Mix the shampoo cream into the palms of your hands. Massage the shampoo into your hair and distribute it evenly throughout the hair. Leave the shampoo cream on your hair for 8-10 minutes. Wash your hair with water well and enjoy the vibrant black color.