Using the Electric Lizard Amplified hair dye is easy. First, make sure to lighten your hair to the lightest level 10 blonde for the best color result. Then, apply the cream formula evenly to your hair. Leave it on for the recommended time. This semi - permanent color will last 30% longer than our classic formula. Before using the product for the first time, do a patch test on a small area of your skin. Wait 24 hours. If you experience redness or itching, don't use the product. After coloring your hair, use a mild shampoo and conditioner to keep the color vibrant. Store the product in a cool, dry place to maintain its quality. And remember, this vegan - friendly dye also conditions your hair while adding color.