What causes black stains on limestone?
Posted by FOX - Oct 2, 2019 Uncategorized 0 0 Views : 9 Receive Updates For This Category
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Oct 2, 2019
Halo Stains & Bands Of Mineral Deposits. This is caused by trace amounts of sodium and potassium oxides within the Limestone which can also be activated by rain water. Even where rain is slightly acidic, the solutions of these salts in rainwater will gradually become alkaline. Oct 5, 2016