- Versatile water-based pigment ink - Available in a variety of tip sizes - Odorless and quick-drying - Light resistant and resists smudges - Great for all levels Create precise, detailed drawings with the Tombow Mono Drawing Pens and Sets. The odorless, quick-drying, water-based pigment ink in these pens is light resistant and produces smooth, skip-free writing and drawing with no smudges. The durable nibs won't bend even when firm pressure is applied, ensuring a steady ink flow. Great for use with colored art markers and colored pencils, the pens produce excellent results on drawing paper, marker paper, watercolor paper, and mixed media paper.