Charcoal Refills 6 pcs SPECIAL ORDER

A very high quality compressed charcoal available in 3 degrees of hardness. It is manufactured by compressing and firing charcoal clay and a binding agent. Depending on the mixture the resulting degrees of hardness are: 2B = soft 4B = medium and 6B = hard.
A higher degree of blackness compared to natural charcoal is achieved through better adhesion to the paper.

There is a lead holder for these leads (item no.: 20571115).