Posca Paint Marker Pens - PC-1MR - 0.7mm - Set of 16 in Canvas WrapPERFECT PAINT FLOW MITSUBISHI PENCIL has developed a unique valve mechanism that guarantees a perfect seal for the marker and conserves the paint over time. The same mechanism is used to prime the POSCA for use and to re saturate the tip as often as necessary during creation. NON TOXIC Water based paint is permanent, and bleed proof. Combines the accuracy of a line with the quality of paint. MULTI SURFACE USE Can be used on tracing paper, photo paper,