Karin DecoBrush Metallic markers contain 2.4 ml of non-toxic metallic based paint pigments. They are perfectly capable of covering both black and white surfaces. They were produced in 'liquid ink' technology and thus, as opposed to traditional technology, they enable using all the contents. Metallic paint, after drying out, is permanent, light-resistant and waterproof on surfaces such as: paper, wood, ceramics, glass, metal, plastics.