The Faber Castell Pitt Natural Charcoal Pencil Set leaves a much blacker line. Compressed charcoal with soot and clay gives the charcoal pencils their deep black colour and can be produced in different degrees of hardness.
The Staedtler Charcoal Pencil Set has a special lead formulation that contains a high proportion of carbon and charcoal for a wide range of deepest black tones. Set of 4 - Soft, Medium & Hard Charcoal Pencils and Blending Stump.