Journal article
Penetration of boron in Douglas-fir and western hemlock lumber
Forest Products Journal, Vol.39(1), pp.67-70
1989
Abstract
The penetration and retention of disodium octaborate tetrahydrate were evaluated at concentrations of 0.5, 1.0, 2.5, 5.0, 10.0, and 20.0 percent (boric acid equivalent) with dip, full-cell, and empty-cell treatments. After a 1-month diffusion period, boron penetration in Douglas-fir heartwood was less than in western hemlock. Only western hemlock treated with higher concentrations of boron was completely penetrated. As expected, pressure treatments resulted in the highest retention, but there was little difference between full- and empty-cell processes. The results suggest that borates can be delivered to the outer shell in sufficient quantities to permit subsequent diffusion. Further studies with higher solution strengths combined with heating or steaming are recommended.
Details
- Title
- Penetration of boron in Douglas-fir and western hemlock lumber
- Authors
- S T Lebow (Author)Jeffrey J Morrell (Author)
- Publication details
- Forest Products Journal, Vol.39(1), pp.67-70
- Publisher
- Forest Products Society
- Date published
- 1989
- ISSN
- 0015-7473
- Organisation Unit
- University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life
- Language
- English
- Record Identifier
- 99450637602621
- Output Type
- Journal article
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