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Journal articles
Open Access
Brightness stability of mechanical pulps-Relating laboratory data to performance, TAPPI JOURNAL December 1989

Brightness stability of mechanical pulps-Relating laboratory data to performance, TAPPI JOURNAL December 1989

Journal articles
Open Access
Effect of raw-material stabilization on adhesive quality, TAPPI JOURNAL December 1989 89DEC71

Effect of raw-material stabilization on adhesive quality, TAPPI JOURNAL December 1989

Journal articles
Open Access
Hot melts in pressure-sensitive and heat-seal applications, TAPPI JOURNAL December 1989 89DEC79

Hot melts in pressure-sensitive and heat-seal applications, TAPPI JOURNAL December 1989

Journal articles
Open Access
Split addition of chlorine and pH control for reducing formation of dioxins, TAPPI JOURNAL December 1989 89DEC121

Split addition of chlorine and pH control for reducing formation of dioxins, TAPPI JOURNAL December 1989

Journal articles
Open Access
Guest Editorial: Carrying forward the tradition of fundamental research, TAPPI Journal June 2026

Since its first symposium in 1957, the Fundamental Research Symposium has evolved around fundamental research themes aimed at scientifically understanding papermaking. The symposium is organized by the Fundamental Research Committee (FRC), which is operated by the Fundamental Research Society (FRS). The unique format of the symposium, held at universities such as Oxford and Cambridge where participants stay together, fosters intensive academic exchange and collegial interaction.

Journal articles
Open Access
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.

Journal articles
Fibre Length Fractionation Caused by Pulp Screening, Slotted Screen Plates, Journal of Pulp and Paper Science, August 2001, Vol. 27(8)

Fibre Length Fractionation Caused by Pulp Screening, Slotted Screen Plates, Journal of Pulp and Paper Science, August 2001, Vol. 27(8)

Journal articles
The flocculation mechanism of microparticulate retention aid systems, Journal of Pulp and Paper Science, August 2001, Vol. 27(8)

The flocculation mechanism of microparticulate retention aid systems, Journal of Pulp and Paper Science, August 2001, Vol. 27(8)

Journal articles
Open Access
The relationship between Kappa Number and Oxidizable Structures in Bleached Kraft Pulps, JOURNAL OF PULP AND PAPER SCIENCE: VOL. 28 NO. 8 AUGUST 2002 [02AUGJP262.pdf]

The relationship between kappa number and oxidizable structures in bleached kraft pulps, Journal of Pulp and Paper Science, August 2002, Vol. 28(8) (107KB)

Journal articles
A Model of Machine-Direction Tension Variations in Paper Webs with Runnability Applications, Journal of Pulp and Paper Science, December 2002, Vol. 28(12) [02DECJP389.pdf]

A model of machine-direction tension variations in paper webs with runnability applications, December 2002, Vol. 28(12) (328KB)

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