Charcoal. Natural charcoal is one of the oldest drawing implements. Because of its marginal adhesion to paper it can be easily smudged and corrected, and is perfect for soft transitions and shadowing. Our dark black, smooth-gliding charcoal is of the finest quality. Cardboard box, 50 pieces, length: approx. 150 mm, diam. Approx. 3-4 mm (length: approx. 5.91 inch, diam. Approx. 0.12-0.16 inch).