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Conference paper - Peer-reviewed, 2011

The new microscopic method of Simons' stain for characterizing mechanical pulps and quantitatively assessing their fibre development at the cell wall level for fundamental understanding of pulp properties

Fernando, Dinesh; Daniel, Geoffrey


The morphological and chemical characteristics of wood fibre cell walls govern their response to mechanical pulping processes and thereby determine most pulp and paper properties. Information gained at the fibre wall level (e.g. delamination/internal fibrillation (D/IF)) provide important understanding of wood fibre behavior during processing. A new microscopic method, developed by the authors using Simons' stain (SS) was applied to different MPs of Norway spruce produced during three full-scale industrial trials at Holmen Paper, Braviken, Sweden.Never-dried thermomechanical pulps (TMP) produced during two trials (one with varying refining pressure and specific energy consumption (SEC) and the other for high intensity refining with different segment designs) and pulps refined after chip sulfite pre-treatment were analyzed and statistically evaluated for the degree of D/IF using the new SS method. Results from the SS method indicated that refining pressure, turbine segments, specific energy and high dosage of sulfite treatment significantly induced fibre wall D/IF. In addition, the method statistically compared different pulp types for the degree of D/IF caused by process conditions/treatments and provided useful information regarding pulp fibre development at the cell wall level and thereby rendered important clues on energy efficiency.


cell wall ultrastructure; delamination/intemal fibrillation (D/IF); energy efficiency; fibre development; Norway spruce; simons' stain (SS); TMP

Published in

Book title: Proceedings of International Mechanical Pulping Conference 2011
ISBN: 978-7-5019-8251-6


International Mechanical Pulping Conference 2011, JUN 26-29, 2011, Xian, PEOPLES R CHINA

Authors' information

Swedish University of Agricultural Sciences, Department of Forest Products
Swedish University of Agricultural Sciences, Department of Forest Products

UKÄ Subject classification

Wood Science

URI (permanent link to this page)