Nonpermanent marker is designed for overhead projection writing. 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. Fiber-tip pen features a polypropylene barrel and cap with a clip to attach to notebooks pockets and more.