Non-toxic, water-based markers can be used on almost any surface. The alcohol- and solvent-free opaque paint covers well, is blendable, dries quickly, and can be overlaid when dry. The pen contains a valve mechanism for a tight paint seal and a ball within the barrel that mixes the paint, allowing for even paint consistency, texture, and continued, optimal results. These versatile markers can be used on paper, glass, cardboard, wood, porcelain, metal, textiles, ceramics, plastic, and much more without priming (the markers will, however, produce different results on certain surfaces with a primer). The PC-5M medium bullet tip marker is the multi-purpose marker of the POSCA range. It produces neat and precise lines, making it ideal for coloring. An all-around favorite of both professionals and beginners. Brand: Posca