Sakura Pigma Graphic Pens were specifically designed for graphic artists and crafters. High-quality archival pigmented ink is quick-drying, waterproof, chemical proof, fade resistant and will not smear or feather once dry. Will not bleed through most papers. Meets ASTM and ACMI non-toxicity standard. Good for graphic design, cartooning, sketching, free-hand illustrations, calligraphers and tole craft or as a bold line pen for general writing.