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https://vinascg.com/wp-content/uploads/2019/03/148466373882789-suoi-am-1513927688820.jpg540357Charcoal is a very light, black substance made from wood through the process of wood drying (separating carbon elements from other components (mainly oxygen)). Wood charcoal retains some of the structure of wood cells. They are highly absorbable and are used as absorbent, filter, pharmaceutical, fuel or additive of activated carbon and black gun. Charcoal ...