Pigma Micron pens are waterproof and permanent fine liners 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 fine liners 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. Working temp 5˚C - 40˚C. Water-based pigment ink.Details:Black ink penAvailable in multiple sizesSold as a pack of 3 pensFeatured waterproof and permanent fine liners, lightfastBleed freeQuick drying and pH neutralPlastic and inkInk is suitable for filing purposes, archival proofUnique Pigma ink is permanent, color, water, and light-fastMeets ACMI non-toxicity standardsWrites on virtually any porous surface, extremely suitable for use on tracing paperIdeal for fine detail in sketching, drawing and illustrationsNot recommended for use on fabrics intended to be washed and not evaluated for cosmetic use on skinSize information:Micron 005 (0.20 mm)Micron 01 (0.25 mm)Micron 03 (0.35 mm)Micron 05 (0.45 mm)