"Expanding on the popular Crazy Color range, the Metallics range colours provide a hard, silvery, mineral shade. These shades are formulated with quartz for metallic reflections, shine and strong pigment. To achieve exotic, vibrant semi-permanent results, hair must be porous or processed before application. For best results, use on pre-lightened hair. Use in conjunction with the Crazy Color Rainbow Shampoo and Rainbow Deep Conditioner to keep your hair looking healthy and extend the life of your colour."