This highly fluid acrylic ink has very low sedimentation, can be thinned with water or mediums, and dries waterproof. Expect spectacular performance with airbrushes, technical pens, fountain pens, brush application, pouring, or applying with the included dropper. Amsterdam Inks come in a wide range of colors that include metallics and reflex colors. All colors match up with Amsterdam Acrylic paints and Amsterdam Acrylic markers, and also work great with Amsterdam Acrylic mediums. 30 ml jars.