Naturtint Purple Shampoo 330 ML

After dyeing hair, yellow and copper tones may appear resulting from degradation of pigments caused by the oxidation of hydrogen peroxide. The effects of the sun can cause grey hair to turn yellow. This can be enhanced by chlorine and seawater. The loss of melanin over the years and effects of environmental stressors such as UV radiation, oxidize and cause the appearance of unwanted reflections.