East Asian coal briquettes
Type of coal briquette
East Asian coal briquettes
East Asian coal briquettes (Japanese: 練炭, Hepburn: rentan), also known by the names yeontan (Korean: 연탄) or fēngwōméi (simplified Chinese: 蜂窝煤; traditional Chinese: 蜂窩煤, literally "beehive coal"), are coal briquettes used across East Asia for home cooking and residential home heating purposes. They were first invented in Japan, then propagated through the rest of East Asia in the early 20th century, although their usage is now uncommon in contemporary Japan and South Korea. Made from a mixture of lignite coal dust and a gluing agent that keeps the dust particles together, they became a popular alternative to firewood and natural coal because they come in a consistent size and stack easily. In South Korea, there are 5 standard sizes for the briquettes, and the 2nd standard was widely used in households. The 2nd standard briquette is cylindrical in shape, weighs 3.5 kilograms (7.7 lb), and is about 20 cm (7.9 in) in height and 15 cm (5.9 in) in diameter. The standard briquette has 22 holes...
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