Manic Panic Amplified Semi Permanent Hair Dye 118ml. Vibrant and bold hair dye that can be used alone or combined with other Manic panic shades to create a radiant jewelled tone. Amplified collection contains 30% more pigmentation than the Classic High Voltage range and takes a few more washes to remove. This dye works best when applied to bleached or pre-lightened hair. Manic Panic started the vivid hair colour revolution in New York back in 1977. They changed the world with their creative, vibrant and electrifying semi permanent hair colours. This world famous hair colouring brand is used by countless celebrities, models, and celebrity stylists. Using superior ingredients in these high quality rich formulas that are guaranteed Vegan and PPD free. The Cruelty-free colours promise a healthy nourished result.