Truly versatile in all colour applications •Unique colour grip formula allows longer lasting, vibrant colour up to 25 shampoos •Superb grey blending up to 70% •Colours the hair without use of ammonia •Nurtures the hair with a system of protective lipids and vitamins •Two strengths of developer solution •1.9% activator for more subtle tone on tone up to 15 shampoos •4.0% activator for maximum colour intensity up to 25 shampoos