Q1: What are the main differences between active CaCO₃ and ground CaCO₃?
Active CaCO₃ has a surface coating that improves compatibility with binders and reduces oil absorption. Ground CaCO₃ is untreated and may cause higher viscosity and lower dispersion efficiency. The performance difference becomes clear during mixing and film formation.

Q2: Will active CaCO₃ improve leveling and surface smoothness?
Yes. Because active CaCO₃ disperses more evenly, it reduces surface defects such as brush marks and pinholes. The coating flows more naturally, resulting in improved leveling and a more professional finish.

Q3: Does Low O.A. CaCO₃ reduce viscosity?
It significantly reduces viscosity, allowing better pumpability and easier application. Paint manufacturers benefit from reduced energy consumption and faster mixing times, which ultimately lower production costs.

Q4: How does active CaCO₃ affect anti-settling performance?
Thanks to its low oil absorption and surface treatment, it helps stabilize pigment and filler particles, greatly reducing sedimentation during storage. This prevents hard settling and minimizes re-dispersion issues.

Q5: Is it cost-effective compared with ground CaCO₃?
Although the price per ton may be slightly higher, users often see lower overall production cost due to improved efficiency, fewer additives required, and better film quality. In many applications, Low O.A. active CaCO₃ achieves higher performance with lower total dosage.