Introducing Pigma Micron PN. The durable Plastic Nib (PN) provides skip-free writing in eight popular Pigma ink colors. A fine or medium line width (0.4mm to 0.5mm) can be achieved, based on your personal writing pressure. The polyacetal nib structure allows for smooth ink flow whether writing fast or slow, for right or left handed users, and for writing at an angle. Ideal for use on paper. Pigma archival quality ink is waterproof, chemical and fade resistant, bleed free, quick drying and pH neutral.