etymology - Why are "hard water" and "soft water" so called?
I can't think of anything else to say. All I can find via Google is that it's because it's harder to create lather with hard water, but that doesn't seem very convincing to me.
I can't think of anything else to say. All I can find via Google is that it's because it's harder to create lather with hard water, but that doesn't seem very convincing to me.
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