WATERPROOF, FAST DRYING.
Very black, opaque ink for drafting film, paper and tracing cloth. Because it is formulated with a high concentration of carbon particles, it is recommended for any ink work that will be photo-reproduced. Permanent, yet erasable after long periods of time. In a .75 oz.(22ml.) plastic filler bottle,
by KOH-I-NOOR, RAPIDOGRAPH