Bigen Powder Hair Color #57 Dark Brown .21 oz (6 g) offers luxurious, ammonia-free permanent coloring without lifting the hair, and with lesser damage than other color products. Utilizing the power of water activation, this gentle formula allows tiny color pigments to penetrate deeply into the hair shafts for lasting vibrancy. Bigen's unique composition also permits perm or relax treatments and coloring in the same day. Before use, be sure to conduct a preliminary skin test.