Nitram Liquid Charcoal provides a unique way to work with charcoal. Liquid Charcoal is water soluble, so you can adjust the values from very light to a deep, rich black. This versatility opens up a broad spectrum of textures, giving artists a new way to work with sketch like applications. Straight out of the tube it is as thick as oil paint, allowing you to draw with a brush or even use a palette knife to apply it. Nitram Liquid Charcoal dries very quickly and has excellent lightfastness. It can be used wet or dry.