Viarco is a family owned business located in northern Portugal that has been making premium artist drawing materials since 1907. They have developed unique blends of graphite, carbon and binders to produce some of the highest quality sketching materials available today. This water-soluble graphite is packed in a tin for use with a wet brush. Create a wide range of graphite grays from deep black to more transparent shades that are completely erasable! Perfect for studio or plein air use. 20 gram tin.