... microstrip yellow crystal Heptahydrate is mainly manufacturing lithopone, zinc salt of raw materials, YinRanYe of mordant, wood ... centrifugal separation, drying system.E), implement standard: industrial zinc sulfate standards: HG/T 2326-2005F),Execution standard : ... HG/T2326-2005 ITEMIndicatorsI( technical grade zinc sulphate monohydrate )II (industrial-strength heptahydrate )high- ...