Test colors for permanency on a scrap piece of film first, try water based acrylic paints, pencils/pens, ink or heat set paints. Roughing up the surface by sanding (280 to 320 grit) helps to adhere the color to the shrink film when rubber stamping or for designs that will be washed or used often.
Packs of 10, 8 1/2 in. x 11 in. sheets.