... degreasing. In addition, it is also used in manufacture of printing ink, photograph-drug, polyester, explosives, electroplating, tanning ... , ceramic, building materials, crystals and medicine. Industrial Grade Food GradeUnitFine GradeTECHNICAL GRADEFIRST GradeRegular GradeUnitStandardPurity(as K2CO3 ) % ≥ ... % ≤0.002standardGB/T 1587-2000HG2452-93 Technical Grade of Potassium Carbonate