Amsterdam ink is ideal for a wide range of techniques like calligraphy, watercolor, airbrush and can also be used with technical pens. The colours of the Amsterdam Standard Acrylic tubes and these Ink colours are the same, it's easy to colour match. Available in 56 brilliant colours including three metallic and four reflex colours! Amsterdam Ink is a water-based formula that is lightfast, odourless and waterproof once dry. Perfect for mixed-media techniques and can be used on diverse grounds including wood, canvas and paper. You can work straight out of the bottle with a brush or dip pen because of the wide opening, work from a mixing tray or use a dripping technique. Every AMSTERDAM ink bottle comes with a pipette to help you dose the exact amount of ink you want.