Mix Schwarzkopf Igora Zero AMM 60ml 1:1 with Schwarzkopf Igora Royal Oil Developer. After developing, gently emulsify the product to remove the color from the scalp. Then rinse thoroughly until the water runs out clear and finish by shampooing with the Schwarzkopf BC pH 4.5 Color Freeze Shampoo or Schwarzkopf Fibre Clinix Vibrancy.