Valve-action allows the paint to be free flowing, you can write on almost any porous or nonporous surface
Permanent marker marks on most hard-to-mark surfaces with a precision fine point
1. Inks Contain quick-drying, nontoxic alcohol-based ink formula. 2. Inks are conforming to the EN71-3 and ASTM D-4236 approved. 3. Inks are comply with the European union-RoHS directive.
Usage: 1. Shaking the paint pen before using. 2. Pressing the nib for releasing gases inside the pen. 3. Pressing the nib for several times. 4. Please control the nib pressure well and avoid too much leakage.