Multani mitti, or Indian Fuller's Earth, is made by the decomposition of volcanic ash.
Here's a breakdown:
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Origin: Multani mitti is a type of clay, specifically a calcium bentonite clay, similar to kaolin clay.
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Formation: It is formed by the decomposition of volcanic ash, a process that takes place over extended periods of time.
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Historical Use: Historically, "fullers" used this clay to clean sheep's wool before it was spun into yarn, which is how it got the name "Fuller's Earth".
