Charcoal Dust

Charcoal dust was added among other dyes to the mod as an alternative to vanilla methods to obtain colours.

Obtaining
First burn some kind of wood (not planks!) in a normal furnace to get charcoal. Forges won't work. Then put a piece of charcoal in a normal crafting table or your crafting grid to obtain a piece of charcoal dust.

Uses
You can use the dust in the same way, as you use vanilla inc sacs.