白炭
also: はくたん · しらずみ
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Meanings
1
white charcoal
A type of charcoal made by carbonizing wood at high temperature and then cooling it rapidly with a mixture of ash, sand, and soil, resulting in a hard, white-surfaced charcoal. Contrasts with 黒炭 (black charcoal).
See also: 黒炭 (くろずみ)
White charcoal lasts longer than black charcoal.
Binchōtan is a type of white charcoal.
2
charcoal for tea ceremony
Specifically, white charcoal used in the Japanese tea ceremony (茶道). It is prized for its clean burning and subtle heat.
White charcoal is often used in the tea ceremony.