Nonpermanent marker is designed for overhead projection writing. Quick-drying, water-based, nonpermanent ink won't bleed or smudge. Write on overhead transparency film or such glossy surfaces as photos, transparency sleeves, slide frames, cromalins, glass, acrylic & vinyl. Water-soluble ink can be wiped off film using a damp cloth. It is great for crafts, graphic arts, photography, lab work or print shop. Fiber-tip pen features a polypropylene barrel & cap with a clip to attach to notebooks, pockets & more.