Selection of the thinnest black Pigma Micron pens. Pigma Micron 005, 01 and 03. Pigma Micron pens are waterproof and permanent fineliners that are loyally used by designers, scientists, archivers, manga artists, cartoonists, illustrators and hobbyists. It is the recommended pen for Zentangle. The fine nib makes this pen ideal for creating both technical and artistic drawings. The unique Sakura Pigma™ ink will not bleed through paper, is permanent, waterproof, fade resistant, quick drying and pH-neutral.