Koh-I-Noor Pigment-Based Drawing Ink, 1 Oz. Bottle, Blue Violet is a professional-grade semi-transparent pigment-based ink. Waterproof, fast drying ink with a high gloss sheen. Ideal for use with Koh-I-Noor Rapidograph pens and other technical pens, brush applications, airbrushes and dip pens. For use on paper, board, film and vinyl surfaces. Pours easily from a pop-up spout. Made in USA.