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出典:『Wikipedia』 (2011/06/18 20:31 UTC 版)

英語による解説

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Charcoal is the dark grey residue consisting of impure carbon obtained by removing water and other volatile constituents from animal and vegetation substances. Charcoal is usually produced by slow pyrolysis, the heating of wood or other substances in the absence of oxygen (see pyrolysis, char and biochar). The resulting soft, brittle, lightweight, black, porous material resembles coal. Note that the current trade nomenclature for charcoal is "lump charcoal" and that products sold as "charcoal briquettes" are made from a mix of materials, such as low-grade coal, sawdust, wax, and starch binders, and often do not contain any true charcoal.