Since 1882 Prang Art & Craft solutions maintained an uncompromised quality to ignite the passion of our valued creative customers. Efficiency without scarifying quality! Superior Chalk free of foreign materials to create a smooth drawing experience . Prang Ambrite Chalk features assorted colors that blend and burnish easily. Great results on different mediums (Drawing paper or toothed) . This chalk can be flaked into water for brilliant unique paper marbling effects, or draw bold colors on wet paper for other unique effects. This chalk is AP certified non-toxic.