We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Influence of particle size distribution of calcium carbonate pigments on coated paper whiteness.
- Authors
Kumar, Nitin; Bhardwaj, Nishi; Chakrabarti, Swapan
- Abstract
The optical properties of pigments used for paper coating are linked to their morphology. The light scattering through coated layers depends upon the size and the size distribution of the pigments and their packing behavior. In this report the effect of particle packing of various calcium carbonate pigments on the whiteness of the final coated paper is studied. Different grades of calcium carbonate pigments of different particle size distribution and optics were used for coating applications on base papers. Base papers of different optics were also selected. The entire study was carried out at different coat weights. It was observed that the overall scattering from the coated sheet depends upon the light scattering from the base paper as well as through the coated layer. Higher light scattering through the coated layer will lower the effect of the base paper, whether it is dark or bright. So high bright and white pigments are not only the criteria for an enhancement in the optical properties of coated paper; the particle size and size distribution should also be considered before introducing any pigment into a coating formulation. The base optics should also be chosen on the bases of the pigments' optics and their morphology.
- Subjects
PARTICLE size distribution; CALCIUM carbonate; PIGMENTS; LIGHT scattering; PAINT research
- Publication
Journal of Coatings Technology & Research, 2011, Vol 8, Issue 5, p613
- ISSN
1945-9645
- Publication type
Article
- DOI
10.1007/s11998-011-9353-y