This Sakura Pigma Micron drawing pen create precision lines with seven point sizes. The Pigma ink is the most reliable permanent ink on the market today. The ink is permanent, fade and chemical resistant pigment-based. Hence, it will not bleed or run if liquids are spilled on to the writing or drawing after the ink has dried. Pigma ink is almost impossible to alter. Therefore, it is perfect for archivists, doctor or lawyers for their record keeping. Also, artists, writers and illustrators consider Pigma Micron a necessary tool for any archival-quality project.