Grafix This polyester film combines the best features of Mylar and acetate to provide a highly versatile film with high tensile, tear and impact strength. Dimensionally stable, it will not crack, discolor or become brittle with age. It lays flat and is acid-free, archival and heat-resistant. The film has a clear drawing surface. It will accept lead, ink and colored pencil, erases cleanly and is an economical alternative to acetate and drafting film. .003 and .005 are twenty-five sheets per pad or in sheet packs.