General purpose Bombay India Ink is non-clogging and holds a line without spreading. The ink dries waterproof, opaque, and lightfast. It flows freely off pen tip, brush, and airbrush and can be used for rubbing stamping, lettering, and background washes.Bombay India Ink adheres to almost any surface including paper, wood, plastic, vinyl, and board. The ink is AP approved non-washes.Bombay India Ink comes in 30ml bottles. Sold as PACK OF 4.