Staedtler Lumocolor 312-9 Non-Permanent Marker, 1.0-2.5 mm Broad Point, Black Ink. Broad chisel point lets you make lines from 1.0 to 2.5 mm wide. 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. Pen features a polypropylene barrel and cap with a clip to attach to notebooks, pockets and more.