The industry for the production of PVC profiles, pipes and panels has some of the highest requirements for microcalcite, which is one of the main raw materials. The quality of the finished product depends on the quality of microcalcite, its level of whiteness. For PVC product manufacturers, we offer surface-treated microcalcite with a calcium carbonate level of ˃ 99% and a whiteness level of ˃ 98%: