Koh-I-Noor Rapidograph universal drawing inks available in black, red, blue and opaque white. Extremely versatile waterproof drawing ink for use on paper, film, cloth. Rapidograph universal drawing ink is free flowing, fast drying with permanent adhesion, yet is easily erasable from drafting film. Great for technical pens, lettering pens, brushes, airbrushes, more. 3/4- oz. (22ml) bottles. Koh-I-Noor inks are quality-made in the USA.