In a non-metallic bowl, mix 1 part PURE LIGHT Blonding Creme with 2 parts PRAVANA Crème Developer, Zero Lift – 40 Volume (1:2). For on-scalp application, use up to 20 volume, for off-scalp, use up to 40 volume. Apply to dry hair. Process for up to 55 minutes. Rinse throughly after processing then shampoo and condition with desired care products. Check every 5-10 minutes until desired level has been reached.