Using Crazy Color Pinkissimo is easy! First, always do a strand and sensitivity test before applying the dye. Then, shampoo your hair with a pH - neutral shampoo, skip the conditioner, and towel - dry it. While your hair is still damp, put on gloves and apply the Crazy Color evenly. Leave it on for 15 to 30 minutes, then rinse thoroughly until the water runs clear. To keep your vibrant pinky - purple colour looking great, avoid dandruff or harsh shampoos as they can strip the colour quickly. Use a sulphate - free or colour - friendly shampoo and wash your hair as little as possible. After shampooing, rinse with cold water to seal in the colour. Also, stay out of direct sunlight for too long and avoid swimming in chlorinated water, as these can fade the colour. Remember to patch - test the product before regular use, and stop using it if you have any redness or itching.