1805 46 App. 470 Acids of the first order..are all decomposable by red charcoal.
1851 21 June 320/2 Red charcoal is produced when the wood is heated in a close vessel at 356° Fahr.
1913 1 Dec. 29/4 In some countries a kind of semi-charred substance known as red charcoal is prepared for domestic fuel in which the maximum amount of combustible matter is present.