Amsterdam Acrylic Ink is available in 46 brilliant colors! All colors are highly pigmented and are extremely lightfast. The ink has an acrylic resin base and is waterproof when dry. Ideal for a wide range of techniques like calligraphy, watercolor, airbrush and can be used with technical pens. Amsterdam Acrylic Ink has been specially designed to use in combination with acrylic paints, markers, spray paint and auxiliaries!