Ultra Black mounting boards are solid black throughout, and both sides are useable. They cut cleanly and are excellent for mounting transparencies, storyboards, and other art and photographic presentations. Single thick is 116 in., and double thick is 18 in.Available in two surface optionsUltra Black 8 is smooth on one side, textured on the other side. The textured side accepts pastels, chalk, and acrylic paint. The smooth side works well for presentations and painting.Ultra Black Smooth is smooth on both sides. Its the ultimate mounting and presentation board for artwork, photos, computer printouts, layouts, and more. The intense black surface provides more dramatic presentations.