Ground Calcium Carbonate (GCC) is an important raw material in the glass industry, primarily used as a source of calcium oxide (CaO) during glass production. It helps improve the durability, chemical resistance, and mechanical strength of the final glass product. GCC also assists in controlling the melting temperature and viscosity of the glass batch, enabling smoother processing and better quality control. Its high purity and fine particle size ensure uniformity in the glass composition, which is essential for producing clear, strong, and defect-free glass used in windows, containers, and fiberglass.