Pigma Micron Fineliner Pens feature archival-quality, chemically stable ink that is waterproof, fade-resistant, and ideal for acid-free environments. These black pens prevent smears, feathers, and bleed-through on most papers, and are certified non-toxic with the trusted Ap Seal. Perfect for graphic art, scrapbooks, archival recording, pen and ink illustrations, rubber stamps, and cartooning. Gentle pressure is recommended for smaller nibs. Available in seven sizes for precise, lasting lines in any project.