Conté à Paris Sketching Crayons are very soft to apply and made from natural pigments (iron oxides, carbon black, titanium dioxide), clay (kaolin) and a binder (cellulose ether). The crayons are available in 12 colors, including the popular sanguine colors, grey and Bister, as well as three grades of white and black to complete the range. For optimum brightness and intensity, the crayons are formulated using the finest pigments.Usage: Use the edge of the crayons to product energetic lines or details, or its flat side to apply larger areas of color.