Foam board is strong, lightweight and rigid, making it extremely versatile. 3/16" polystyrene CFC-free core springs back to original thickness when cut. Smooth surface accepts screen printing, glue, paint or markers; cuts cleanly with an X-ACTO� knife (sold separately). Art Board Type: Foam; Material(s): Polystyrene Core; Color(s): White Surface/White Core; Assortment: N/A.