Q1: Why is calcium carbonate important in paper manufacturing?
It is used as a filler and coating pigment to improve brightness, opacity, and smoothness, replacing more expensive minerals like titanium dioxide.

Q2: What is the difference between ground and precipitated calcium carbonate in paper?
Ground calcium carbonate (GCC) comes from natural limestone and is ideal for bulk filling. Precipitated calcium carbonate (PCC) is chemically produced and has a controlled particle size for premium coating applications.

Q3: How does it affect print quality?
It enhances ink absorption and sharpness, resulting in clearer, more vibrant printing on paper.

Q4: Does calcium carbonate reduce production costs in paper mills?
Yes. It lowers raw material costs and can reduce energy consumption during paper drying because it retains less water compared to other fillers.

Q5: Is calcium carbonate suitable for all types of paper?
It is widely used in office paper, magazine paper, and packaging boards, but not in highly acidic paper-making processes, as acids dissolve calcium carbonate.