This Koh-i-noor technical pen ink is a versatile waterproof drawing ink ideal for use on paper, film, and cloth. It is free flowing and fast drying with permanent adhesion, but is also designed to be easily erasable from drafting film. This high quality ink is perfect for any illustrator, draftsman or artist, using a technical pen. The Kohinoor India ink is made with a high concentration of carbon particles useful in photo-reproduction. We offer colors of blue, red, opaque white, and high-opacity black India ink.