In addition to kaolin and talc, calcium carbonate is used in the paper industry as a filler and coating pigment in the production of paper. Since calcium carbonate is rhombohedral even when very finely ground, it is primarily used in papers with the highest degree of whiteness and good printability.
7、Calcium carbonate can be used as calcium supplement, Calcium carbonate's absorption rate is 39% which is lower than that of calcium citrate malate, it is soluble in gastric acid. Calcium carbonate is the most widely used calcium supplement. 8、Calcium carbonate is alkaline, it is usually used to improve acid soil.