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What is the reason for the film on tea made with tap water and what causes the unsightly rings and stains inside the cup?

April 26, 2017causes Film Rings stains tap tea unsightly water

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What is the reason for the film on tea made with tap water and what causes the unsightly rings and stains inside the cup?

1 Answer

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These rings and stains are formed by calcium and magnesium salts found in normal tap water that may …