HAIR THICKENING SHAMPOO is a kind of product which can change your hair from white to black only in 5 minutes like using normal shampoo. This semi permanent hair blackening shampoo is natural, non-toxic without ammonia. Compared to the traditional hair color cream, it owns the advantage of low cost, time-saving and convenience.1. ConvenientEasy in operation, just like using normal shampoo. 2. Time savingOnly one sachet can give you black shininghair in 5 minutes. 3. Cost savingCompared to the expensive cost for dyeing hair in the hair salon,the hair black shampoo is more than 10 times cheaper. 4. Natural and mildBest hair shampoo is a hair-care product in a formula ofnatural luxurious herbal essence, there will be no side effect to your hair nor scalp when it gives you black and shining hair. 1. Put on gloves (otherwish the nails will be dyed grey, although that does not affect health)2. Make your hair wet with both your hands.3. Wipe off the water on the hair.4. Promptly put the shampoo on the hair and rub it until it reaches the bottom of the hairs, then rub the hair for 5-10 minutes so that the shampoo moistens the bottom of each hair.5. Wash the shampoo away.6. The hair will become dark and shining. ..