Nitram Liquid Charcoal is a wonderfully imaginative medium that allows you to explore the tones, variations and textures of charcoal in a painterly way! It is water-soluble, so you can adjust the values from very light to a deep, rich black. Straight out of the tube, it is as thick as oil paint – you could even use a palette knife. Details:Black1.69 oz. tubeLiquid charcoal dries quicklyWater-solubleErasableConforms to ASTM D-4236