Talc is used as a filler to improve the paper's opacity, brightness, and smoothness. It enhances the quality of the paper by filling gaps between paper fibers, which results in a smoother surface and increased opacity, making the paper more suitable for printing and writing.

Talc aids in improving the paper's properties such as stiffness, rigidity, and printability. It enhances the paper's ability to retain ink and reduces ink absorption, resulting in sharper and clearer printed images.

Talc is effective in controlling moisture and pitch content in the paper-making process. It helps in minimizing the accumulation of sticky materials, like pitch, which could interfere with paper production equipment.

Talc contributes to increasing paper strength and dimensional stability. It improves the paper's resistance to tearing and enhances its tensile strength.

In certain coating applications, talc is used to modify the surface properties of paper, improving print quality and providing a better surface for specialized coatings and treatments.