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Depending on the ultimate use of the abrasive article, the filler typically has a specific gravity in the range of 1.5 to 4.5,and an average particle size of the filler will preferably be less than the average particle size of the abrasive particles.Examples of useful fillers include: metal carbonates such as calcium carbonate (in the form of chalk, calcite, marl, travertine, marble or limestone),
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