Finest quality colored surface papers mounted to acid free groundwood pulp middle with acid free white backing paper. Middle and backing are buffered with calcium carbonate. The beautifully textured surface papers are colored with pigments and are highly resistant to fading and bleeding. Crescent mat boards are suitable as colored drawing boards and are responsive to acrylic, pen and ink, felt markers, pastels, crayons and watercolors as well as rubber cement. Single thickness (.050-.060) size 32" x 40".