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Journal articles
Open Access
Pulping and Papermaking Properties of Managed Second-Growth

Pulping and Papermaking Properties of Managed Second-Growth Softwoods, 1995 Pulping Conference Proceedings

Journal articles
Open Access
Editor's Notes: Ready for a Test Drive, TAPPI JOURNAL, Novem

Editor's Notes: Ready for a Test Drive, TAPPI JOURNAL, November, 2006

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
Open Access
Comparative annual cost efficiency between thermal and chemical oxidation of TRS in kraft mills, TAPPI JOURNAL, July 2005, Vol. 4(7) (200 KB)

Comparative annual cost efficiency between thermal and chemical oxidation of TRS in kraft mills, TAPPI JOURNAL, July 2005, Vol. 4(7) (200 KB)

Magazine articles
Open Access
A financial analysis of north american pulp and paper companies, TAPPI JOURNAL, July 2000, Vol. 83(7)

A financial analysis of north american pulp and paper companies, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Investing in the future of your mill, TAPPI JOURNAL, July 2000, Vol. 83(7)

Investing in the future of your mill, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Design and operation of a woodwaste cogeneration plant, TAPPI JOURNAL, September 2000, Vol. 83(9)

Design and operation of a woodwaste cogeneration plant, TAPPI JOURNAL, September 2000, Vol. 83(9)

Magazine articles
Open Access
Environmental issues continue to be a major industry concern, TAPPI JOURNAL, September 2000, Vol. 83(9)

Environmental issues continue to be a major industry concern, TAPPI JOURNAL, September 2000, Vol. 83(9)

Journal articles
Open Access
Qualification of welding procedures for duplex stainless steels, TAPPI JOURNAL, September 2000, Vol. 83(9)

Qualification of welding procedures for duplex stainless steels, TAPPI JOURNAL, September 2000, Vol. 83(9)

Magazine articles
Open Access
Taiwan holds first symposium on environmentally friendly and emerging technologies for a sustainable industry, TAPPI JOURNAL, September 2000, Vol. 83(9)

Taiwan holds first symposium on environmentally friendly and emerging technologies for a sustainable industry, TAPPI JOURNAL, September 2000, Vol. 83(9)

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