The Pigma Graphic ink pens feature: Archival quality ink, chemically stable, waterproof, and fade resistant No smears, feathers, or bleed-through on most papers A variety of drawing nibs sizes and types In three line-widths of 1mm bullet, 2mm chisel, 3mm chisel Writes on fine papers like vellum, (a translucent paper that resembles smooth parchment).
