Did you know?? Keratin is the protein that the hair is made up of. Keratin is pale YELLOW. When lightening hair we basically dig all of your natural colour pigments until pale yellow then we have to STOP. This is because we’ve hit the hairs protein layer and if we take it any further there’s no going back. 100% incurable damage and we haven’t done our job as professionals. Ash is achieved by a toner that NEUTRALISE’S yellow. So when we talk about the important of maintenance/toners/treatments… we say it because we care and have a duty to you and your hair.