Artists, writers, and illustrators reach for Sakura Pigma Micron Pens to convey their personality, style, or ability, and to safeguard their work with the lasting quality of Pigma ink. Pigma Micron pens are acid-free and archival, making them ideal for paper crafts, journals, illustration, crafts, or any application requiring precision and permanence. Unlike dye-based ink found in most pens and markers, Pigma ink will not feather or bleed, even through the thinnest paper. Pigma ink is derived from a single pigment to ensure color consistency, and is fadeproof against sunlight or UV light. Pigma inks will not clog or dry out like most mechanical pens. Pens are not refillable.