The Expo Wet Erase Markers are designed specifically for marking on acetate films, such as overhead projector transparencies and laminated boards. Formulated for intense heat, the fade-proof ink dries quickly, without bubbles or cracks. The durable fine-point tip on the wet erase markers aids in the production of highly detailed graphics and legible text. These odorless wet erase markers are an ideal choice for use in classrooms and small offices.