L'Oreal Professionnel Inoa Ammonia Free Permanent Hair Colour (60g) For Professional Use Only. An oil-based, ammonia-free permanent hair colour that delivers complete grey coverage. With a gentle formula that cares for the hair and scalp to leave hair with optimum coverage, luminous shine and lasting vibrancy. Features: Ammonia-free Odourless Up to 3 levels of lift 100% grey coverage Optimum scalp comfort Long lasting vibrancy Mixing Ratio: 1:1