... edit this period of white corundum physical and chemical index USES specifications main chemical composition %Al2O3 Na2O magnetic material % ... 6, after pickling steps to impurities. Edit this section USES for example 1, can be used in all kinds of sand ... stones, seals, and stone, antiques, marble tombstone, ceramics, wood, bamboo piece of etching artists. 4, pretreatment processing: TEFLON (TEFLON), ...