Speedball Professional Relief Ink is a water-miscible, oil-based printmaking ink comprised of quality, lightfast pigments available with no added fillers. The ink delivers rich, intense, crisp prints with the archival qualities professionals demand, and is formulated for the working properties professional artists desire; consistent roll-out, beautiful transfer, tack and holds fine details. Details:Available in multiple colors8 oz. (236 mL)Oil-basedLightfastEasy clean-upInk easily cleans up with soap and waterAP certified