8. Density and Specific Gravity

  1. Rubin Shmulsky and
  2. P. David Jones

Published Online: 13 MAY 2011

DOI: 10.1002/9780470960035.ch8

Forest Products and Wood Science An Introduction, Sixth Edition

Forest Products and Wood Science An Introduction, Sixth Edition

How to Cite

Shmulsky, R. and Jones, P. D. (2011) Density and Specific Gravity, in Forest Products and Wood Science An Introduction, Sixth Edition, Wiley-Blackwell, Oxford, UK. doi: 10.1002/9780470960035.ch8

Publication History

  1. Published Online: 13 MAY 2011
  2. Published Print: 10 JUN 2011

ISBN Information

Print ISBN: 9780813820743

Online ISBN: 9780470960035



  • density and specific gravity;
  • specific gravity of wood - single, important physical property;
  • yield of pulp per unit volume - related to specific gravity;
  • cellular structure of wood - unique properties;
  • density (D), as mass or weight per unit of volume;
  • total weight of wood product - sum of weight of wood substance plus moisture;
  • density and specific gravity - calculated at any moisture content;
  • cell wall density and porosity;
  • wood, extractives and infiltrates - terpenes, resins, polyphenols as tannins, sugars and oils;
  • juvenile wood and reaction wood - density of juvenile wood, less than that of mature wood


This chapter contains sections titled:

  • Effects of Moisture Content

  • Cell Wall Density and Porosity

  • Calculation of Weight and Buoyancy

  • Impact of Extractives and Inorganic Materials on Specific Gravity

  • Methods of Determining Specific Gravity

  • Relationship of Density to Growth Rate

  • Variability of Density

  • Sources of Variation in Specific Gravity

  • Juvenile Wood and Reaction Wood

  • Density of Forest Products

  • Metrication

  • References and Supplemental Reading