Water-based pigment ink Tombow MONO Drawing Pens produce smooth, skip-free drawing and writing with no smudging – ink dries instantly! Durable nibs will withstand firm pressure without bending tips, ensuring steady ink flow. Great for use with colored art markers and colored pencils. Produces excellent results when used with drawing, marker, watercolor, and mix media paper. Ideal for illustrations, technical drawings, manga, anime, lettering and journaling.