Hair therapy in one word. Makes white hair red/mehndi color, black hair darkens, hair conditioner works, hair is super silky. Mix 3/4 teaspoon of henna with all the parts of 1 raw egg or 2 teaspoons of sour curd with enough water and soak it for half an hour. Hair is properly cared for. Just to make mehndi color, mix some henna powder with tea or coffee liquor and apply it on your hair for one to one and a half hours and then wash it off. In this way, 2 times a week should be used, black hair should be kept in the hair for 3 hours to light sunlight brown. It is better not to use shampoo within 24 hours.