The Blacklight Neu:Vio Blonde Science Violet Shampoo gently cleanses while neutralizing unwanted yellow tones. Powered by NEU technology enriched with squalane and high-purity chromophores, it helps balance tones while delivering hydration and shine. Its gentle formula revitalizes blonde, gray or lightened hair, leaving it bright, refreshed and beautifully toned. Neutralizes unwanted yellow tones Gently cleanses without weighing hair down Enhances brightness and shine of blonde hair HOW TO USE Apply to wet hair and gently massage to create a rich lather. Leave on for a few minutes depending on the desired toning intensity, then rinse thoroughly. Repeat if necessary.