Margaret V. Ennis
Published: 2006
Total Pages: 44
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"Stains develop on the surface of Indiana dimension limestone when the padding material used as spacers to stack the finished stone on pallets is exposed to prolonged periods of high moisture. these pad parks create problems for every participant in the project ... Improper cleaning techniques, particularly attempts to remove pad marks by abrasion, can so severely damage the limestone that the only solution is to replace the stone ... An investigation of how to remove these stains without damaging the finished stone surface was pursued by the Indiana Geological Survey during a 12-month study. ... The pad marks were treated with ten commercial products ... several basic household cleaning agents, and two caustic chemical compounds. ... Seven of the commercial products removed part or all of the pad marks and three of the household materials removed part or all of the stains. Simulating natural weather conditions was an effective way of remediating the stains."--Page 1
