Thoroughly wet hair and scalp. Pour one sachet of powder into the bottle with the applicator and add 60 ml of warm water (up to the measuring mark). Shake the contents for 30 seconds to activate the formula and form a light jelly. Using your fingertips, distribute the jelly onto the scalp and throughout the hair. Leave the mask on for 5 minutes, then rinse thoroughly using your regular shampoo and conditioner. Carefully wash the bottle and save it for the next procedure. Use the mask every 2–3 weeks. Note: Do not use the mask after hair coloring for the first three washes.