Natural charcoal sticks are the oldest sketching and drawing material in the world.
The greyish-blue shade glides softly across the paper, rubs and smudges easily, and can be erased without difficulty and repeatedly overlaid.
Their blueish hue has always held a fascination, even with the old masters. The charcoal pencils leave a much blacker line.
Compressed charcoal with soot and clay give the charcoal pencils their deep black colour and can be produced in different degree of hardness.