Calcium carbonate is used in glass as a stabilizer, modifies the viscosity, and increases the durability of the glass. For all types of glass, the common properties required of calcium carbonate are shallow iron content, consistent chemical characteristics, and low moisture content.
Calcium carbonate is another main component in the production of ceramics. Calcium carbonate is an economical source of calcium oxide, which is needed as a melting agent at high temperatures, improves the mechanical and chemical strength of the glass body, and reduces shrinkage from firing. Calcium carbonate improves the mechanical and chemical strength of the glass body and reduces shrinkage from firing.