In Laos, 20th century, a unit of mass, = 3.75 grams.
The bak and the houn are the only two Laotian units of mass used both in ordinary trade and in the opium business. In ordinary trade, bak is a synonym for salung, and 1 bak = 2 fuang = 10 houn = ¹/4 bat. In the opium trade, however, 1 bak = 10 houn = ¹/10 bia or hong.
United Nations, 1966.
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Last revised: 22 June 2009.