Archival quality ink for use in acid-free environments Smooth skip-free writing crisp ink colors that leave consistent lettering and lines every time Chemically stable waterproof and fade resistant No smears feathers or bleed-through on most papers Applications Sketching graphic art fine outline work Tamper proof writing Scrapbook Archival recording Pen and ink illustrations Freehand art Rubber stamps Cartooning Meets ASTM and ACMI non-toxicity standard Not evaluated for cosmetic use on skin