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单词 red charcoal
释义

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red charcoal
red charcoal n. now rare a variety of charcoal containing a smaller proportion of pure carbon than usual, and a greater proportion of organic material.
ΚΠ
1805 Monthly Rev. 46 App. 470 Acids of the first order..are all decomposable by red charcoal.
1851 Sci. Amer. 21 June 320/2 Red charcoal is produced when the wood is heated in a close vessel at 356° Fahr.
1913 Times 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.
extracted from redadj.n.adv.
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