Abraum salts is the name given to a mixed deposit of salts, including halite (sodium chloride), carnallite, and kieserite (magnesium sulfate), found in association with rock salt at Aschersleben-Staßfurt in Germany . The term comes from the German Abraum-salze, "salts to be removed."[1]
Abraum, which is red, is used to darken mahogany.[2]
Original source: https://en.wikipedia.org/wiki/Abraum salts.
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