In papermaking, fillers are added to improve brightness, opacity, and surface smoothness, while also reducing production costs. They partially replace pulp without affecting paper quality.
Common Paper Fillers:
-
Calcium Carbonate (GCC & PCC): Provides high brightness, opacity, and a smooth finish; ideal for printing and copy paper.
-
Talc: Used in coated and specialty paper to improve printability and reduce pitch problems.
-
Kaolin Clay: Enhances gloss and ink receptivity in coated paper and high-end art paper.
-
Titanium Dioxide: Offers high whiteness and opacity; used in premium-grade papers.
Why Are Fillers Used in Paper Production?
-
Improve print quality and ink absorption
-
Lower production costs by reducing fiber usage
-
Enhance smoothness and bulk
-
Increase light scattering for opacity
Modern papermaking relies on optimized filler systems tailored to machine type, paper grade, and environmental conditions.
