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Journal articles
An image analysis method to quantify fibre separation in wood subjected to fatigue loading, TAPPI JOURNAL, December 2000, Vol. 83(12)
An image analysis method to quantify fibre separation in wood subjected to fatigue loading, TAPPI JOURNAL, December 2000, Vol. 83(12)
Journal articles
Deinking of newspaper assisted by steam explosion, TAPPI JOURNAL, December 2000, Vol. 83(12)
Deinking of newspaper assisted by steam explosion, TAPPI JOURNAL, December 2000, Vol. 83(12)
Journal articles
Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)
Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)
Journal articles
E-commerce: panacea or placebo?, TAPPI JOURNAL, July 2001, Vol. 84(7)
E-commerce: panacea or placebo?, TAPPI JOURNAL, July 2001, Vol. 84(7)
Journal articles
Fibre fractionation for high porosity sack kraft paper, TAPPI JOURNAL, June 2001, Vol. 84(6)
Fibre fractionation for high porosity sack kraft paper, TAPPI JOURNAL, June 2001, Vol. 84(6)
Journal articles
Bleaching of recycled fibers by adding sodium borohydride to a peroxide reinforced oxygen stage, TAPPI JOURNAL, June 2001, Vol. 84(6)
Bleaching of recycled fibers by adding sodium borohydride to a peroxide reinforced oxygen stage, TAPPI JOURNAL, June 2001, Vol. 84(6)
Journal articles
Effects of chemical composition on the removability of recovery boiler fireside deposits, TAPPI JOURNAL, June 2001, Vol. 84(6)
Effects of chemical composition on the removability of recovery boiler fireside deposits, TAPPI JOURNAL, June 2001, Vol. 84(6)
Journal articles
Performance evaluation of pulper consistency control with dead-time compensation, TAPPI JOURNAL, March 2001, Vol. 84(3)
Performance evaluation of pulper consistency control with dead-time compensation, TAPPI JOURNAL, March 2001, Vol. 84(3)
Journal articles
Performance of poly(ethylene oxide)/cofactor retention aids in mechanical pulp furnishes, TAPPI JOURNAL, March 2001, Vol. 84(3)
Performance of poly(ethylene oxide)/cofactor retention aids in mechanical pulp furnishes, TAPPI JOURNAL, March 2001, Vol. 84(3)
Journal articles
Optimization of optical coverage of board surfaces with assessment of light scattering and absorption using mineral as a coating component, TAPPI Journal June 2026
ABSTRACT: One of the primary functions of mineral inclusion into paper or paperboard is to improve the optical performance of the substrate. A coating may be applied to a sheet in order to cover a dark base, to improve the sheet opacity, to give the correct smoothness and gloss, or to give a suitable surface on which to print. The brightness of a pigment has long been used as a guide for pigment choice in paper and board. However, the measured paper brightness is a function of color and light absorption (K) of the coating and base and the light scattering (S) within the sheet resulting from interfaces with different refractive index. The optical performance can be quantified by measuring the S&K coefficients as described by the Kubelka-Munk model/theory in a filled or coated paper sheet. In coating, this is often assessed as a function of coat weight, and the corresponding physical sheet properties are assessed at the same time; for example, the correct gloss, smoothness, point-to-point uniformity, and printability. The optical performance in the sheet is often not directly related to the pigment brightness, but is largely a function of the particle packing within the sheet and coating layer. In the first and second main sections of this work, respectively, we show how S&K calculations from the Kubelka- Munk equations can be used in coated sheets to determine the optical performance and how this can be used as a predictive tool for the final sheet performance. This is presented for base sheets with different starting brightness. The third section of this work focuses on how mineral combinations in coatings can be used to improve the light scattering and consequently the optical performance of the board. We include theoretical considerations and then finally share a case study for improvement on the optical properties of recycled board.