API grade --13A Barite Typical Properties of Physical and ChemicalSpecific Gravity4.3~4.4Ba(Sr)SO497-98%Size325mesh,400mesh,500mesh,600mesh,800mesh,SiO20.5% maxOil Absorption7~10 Brightness (Hunter L)92minAl2O30.1% maxPh Value6~9CaO0.3% maxMoisture0.1% maxHg1ppm maxLoss on Ignition1% maxCd Usage 1. As raw material for paints, printing ink, plastics, rubber and storage battery. 2. As surface smear ...