Quick-drying, permanent pigment ink in a nylon nib pen. Works great in illustration, calligraphy, craft projects and scrapbooking. Micro pigment ink is waterproof and fade-proof against sunlight or UV light. Archival, acid-free, will not feather or bleed, even through thin papers. Unlike the dye-based ink found in most pens, it gives permanent, true color reproduction. 10 (0.60mm) tip. Black. AP Seal, non-toxic.