Calcium carbonate (CaCO₃) is the first and most prevalent mineral in the world and can be found in relatively large quantities as limestone, marble, and chalk. Its Mohs hardness is ~3, making it the softest and most easily used of fillers.
Because of its high whiteness, chemical inertness, ease of dispersion and low cost, calcium carbonate is essential for the integrity of paint formulations and production economics in paints and allied industries.
Why Calcium Carbonate is preferred across demanding industrial formulations.
Performance engineered by 20 MicronsCalcium Carbonate supports a broad range of industrial processes and finished-product requirements.
Emulsions, primers, decorative paints and wall putties (high loading capacity).
Enhances stiffness, dimensional stability, and processability.
Improves hiding power, slip and printability; may be used to modify or replace TiO₂.
An economical filler to enhance bulk and mechanical properties.
Employed in rubber articles, sealants, caulks and cement-based systems.
Bp/mp 839/903℃; Calcium supplement and antacid preparation (high purity grades).
Our experts will guide you to the right calcium carbonate solution.
Our experts will guide you to the right calcium carbonate solution.
Important information about Calcium Carbonate, grades and applications.
It provides whitening, opacity, rheology control, and mechanical strength while significantly reducing formulation costs.
Both natural (GCC) and synthetic (PCC) calcium carbonate are available, depending on performance needs.
It is commonly used in exterior paints where cost and opacity are priorities, though high-end exteriors rely more heavily on TiO₂ for weather resistance.
Dolomite (CaMg(CO₃)₂) generally offers higher hardness (Mohs 3.5–4) , better scrub resistance , and improved weathering performance compared to calcium carbonate (Mohs ~3) . From a cost perspective, dolomite is typically more economical than CaCO₃ , making it attractive for high-volume decorative paints, primers, and putties . Calcium carbonate, however, is preferred when higher whiteness, smoother surface finish, and better dispersion control are required, especially in premium coatings and paper applications .
Watch how Calcium Carbonate supports real-world industrial applications.
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