PERFECT 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. EXTRA-FINE - Calibrated tip ringed in metal, the PC-1MR has all the qualities of a paint marker – in the form of a pen! Designed for amateurs and professionals looking for an ultra-fine, dense line, it offers a rich palette of colour effects.