This highly fluid acrylic ink has very low sedimentation, can be thinned with water or mediums, and dries waterproof. Spectacular performance with airbrush, technical pen, fountain pen, brush application, poured or utilize the dropper that comes with the jar. Ideal for a wide range of techniques like calligraphy, watercolor and airbrush. It can be used as paint or ink. Waterproof when dry. Jar is approx. 1oz.