Twin color provides roughly 8 to 12 weeks period of colored hair with a mild formulation. Semi permanent coloring enhanced hair natural looking, softness and weightless. Usage: 1. Mix equal amounts of Twin Color Coloration and Twin Color Oxydant Cream a no-metal container. 2. Apply the mixture to hair layer by layer and leave on for 20-30 minutes. 3. Rinse off thoroughly. 4. For best result, apply the mixture to hair layer by layer. 5. Use conditioner rinse hair thoroughly.