The Precision Blend 15 Volume Developer is specifically formulated to work with the Precision Blend color system. Its cream texture ensures smooth mixing and controlled development for natural, subtle gray blending results. Ideal for professional use. Controlled and even development Cream texture for easy mixing Natural and discreet gray blending results HOW TO USE Mix with Precision Blend hair color according to manufacturer instructions. Apply to dry hair and process for the recommended time before rinsing thoroughly.