UNI POSCA Acrylic Paint Marke - Mark in vivid color on practically any surface. The opaque, waterbased ink in Uni Posca markers dries to a matte finish on both porous and non-porous surfaces. Odorless, fadeproof, and bleedproof, these markers are great for posters, signs, sketching, lettering, graphs, and charts. Use them on paper, matboard, wood, styrofoam, metal, plastic, vinyl, glass, and more.