Grafix Dura-Bright is a pH neutral Polypropylene film for mixed media. The smooth, non-absorbent surface is ideal for watercolor, acrylic, pencil, alcohol ink, stamping, due-cutting and even sewing. The .01 heavy weight sheets are also heat resistant and wipeable for reuse. This pad of 9×12 inch Dura-Bright in opaque white has 12 sheets. Made in the USA.