Universal drawing Inks are waterproof and extremely versatile for use on paper, film and tracing cloth. They are free-flowing, fast drying with permanent adhesion yet are easily erasable from drafting film. Available in high-opacity black India, opaque white and vivid transparent colors, all of which can be mixed to produce intermediate colors or diluted with distilled or boiled water to achieve lighter hues. In .75 oz. filler-spout bottles.