Jul 03, 2018· 2.1. Raw Materials. CaCO 3 raw material used as the substrate in this study was produced in Huadian Quanxing Mining Co., Ltd. Manufacturer, Huadian, Jilin Province, China. The purity, hiding power, whiteness, and average particle size of the raw material are respectively (indicated by X-ray diffractometer), 185 g/m 2, 97.82%, 1.21 μm (d 50), and 4.87 μm (d 90), indicating that the CaCO ...
