Diane Townsend Terrages pastels were originally developed to meet the desires of pastel painter Wolf Kahn. Each contains finely ground pumice stone that plows into the paper, creating a toothy surface on which to transfer complex layers of color. - Townsend Terrages Pastel Set - Primary Colors, Set of 7Townsend Artist Pastel, PRIMARY 7PC SET - Includes Bone Black 119, Cadmium Red Light 52, Cadmium Yellow Light 70, Green oxide 155, Titanium White 128, Ultramarine Blue 17, and Ultramarine Violet 24.