Koh-I-Noor Rapidograph red drawing ink is extremely versatile waterproof drawing ink for use on paper, film, cloth. Rapidograph universal red drawing ink is free flowing, fast drying with permanent adhesion, yet is easily erasable from drafting film. Great for technical pens, lettering pens, airbrushes, more. 3/4-ounce bottle. Rapidograph red drawing inks are quality-made in the USA.