Quick-drying, permanent pigment ink in a precision, fine-point 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. Class pack contains one each of every point size and color in Micron, Graphic and Brush lines. Packaged in a sturdy, reusable storage container. AP Seal, non-toxic.