These durable Art Books feature 40 sheets of heavy-weight French paper that is suited for final drawings and strong enough to handle a variety of wet and dry art media applications. The 138 lb. paper is acid-free and offers two textures - one side fine and the other side medium. The two-sided pages offers additional versatility to accommodate desired mixed media techniques. Both surface textures also provide excellent erasability. The Mixed Media Art Book is double-wire bound and lays flat while working. Pages are micro-perforated for easy removal of completed drawings.