Cretacolor is a leading dry media manufacturer based in Austria where all its products have been manufactured for decades. Cretacolor products are internationally recognised as being of very high quality. Natural Charcoal is produced by charring willow boughs of air. Thus, the rods are bent also different and vary in strength. It is characterized by a lighter, irregular line. Suitable for sketching. The 13 Assorted Charcoal Set in the transparent tube contains natural charcoal in diameters of 4mm, 6mm, 8.5mm, 12mm.