is a fine point writing instrument offering a waterproof, quick-drying pigment ink. Fade proof and smudge proof on porous surfaces, including 100% cotton fabrics. Will not smear or feather when dry. Fade resistant. Does not bleed through most paper. Use for writing on paper tags and cotton twill tape. Does not write on plastics, so will bead and smear if used to mark on barrier coats applied to objects. Never use to write directly on objects or archival materials. pH neutral and chemically stable. Ideal for acid-free environments. Excellent for non-museum collection purposes such as graphics, journaling, scrapbooks, memos, illustration, drafting, archival recording, cartooning, and accounting.