Pitt Charcoal Medium | Faber-Castell
the natural charcoal are the most ancient tool works to make sketches and to draw. the blue-gray tinge through the paper and can be removed without difficulty. the bluish hue has always had a special fascination even on old masters. clay pencils leave a more pronounced black line. coal packed with clay and soot gives an even more intense black color and can be produced in different grades of hardness.