Specially designed for writing on acetate films, such as OHP films, as well as many other materials like glass and other smooth surfaces. The smudge-proof, water-soluble, and quick-drying ink ensures that your notes and markings remain clear and legible. Ideal for presentations, meetings, or creative projects where reliable and lasting labeling is required. The ink wipes off virtually all non-porous surfaces with a damp cloth, making it easy to correct mistakes or update information. Perfect for use in offices, schools, and at home, this versatile writing tool is a must-have for anyone needing dependable and efficient marking solutions. Thanks to its quick-drying properties, you don't have to worry about smudging or smearing, which is especially beneficial for important documents and presentations.