Staedtler Lumocolor Non-Permanent 315-9 Black 1.0 mm Medium Point Marker. Quick-drying, water-based, nonpermanent ink won't bead or smudge. Write on overhead transparency film or such glossy surfaces as photos, transparency sleeves, slide frames, cromalins, glass, acrylic and vinyl. Water-soluble ink can be wiped off film using a damp cloth. Great for crafts, graphic arts, photography, lab work or print shop. Fibre-tip pen features a polypropylene barrel and cap with a clip to attach to notebooks, pockets and more.