Pigma Micron pens are waterproof and permanent fineliners that are loyally used by designers, scientists, archivists, architects, Manga artists, cartoonists, illustrators and hobbyists. The fine nib makes this pen ideal for creating both technical and artistic drawings. The fineliners have a protective metal sleeve around the extended tip to give extra control and increased resilience when used with drawing aids such as rulers. This permanent, fade resistant, chemically stable, pigment-based ink will not bleed or run if liquids are spilled on or applied to the document after the ink has dried. Perfect for legal situations, Pigma ink is nearly impossible to alter on documents, in logbooks, or on checks. Architects, archivists, anthropologists, entomologists and laboratories depend on Pigma Micron for record keeping. Pigma Micron is the first disposable technical pen using archival pigmented ink. It does not smear, feather, or bleed through on most paper.Details:Sepia ink pensIncludes assorted sizesSold as a set of 8 piecesWorking temperature 5°C - 40°CWater-based pigment inkThe fineliners have a protective metal sleeveUnique Pigma ink is permanent, color, water, and light-fastWrites on virtually any porous surface, extremely suitable for use on tracing paperThe ink will not bleed through the paperThe unique Pigma ink is suitable for filing purposes, archival proofMade in JapanSize Information:Micron 003 (0.15 mm)Micron 005 (0.2 mm)Micron 01 (0.25 mm)Micron 03 (0.35 mm)Micron 05 (0.45 mm)Micron PN (approximately 0.45 mm)Micron BR (brush)Micron GR (1 mm)