Determining the degree of heat treatment of wood by light polarization technique

Hariyadi Soetedjo*, Ilpo Niskanen, Lauri Rautkari, Michael Altgen, Eero Hiltunen, Göran Thungström, Daniel Zakrisson, Jukka Räty

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)


Thermal modification of wood enables the use of non-durable wood species in exterior applications, but quality control methods are required to monitor the product variability. This study tests the potential of a light polarization technique where visible light (400–500 nm) is directed through a linear polarizer to the surface of thermally modified wood to measure the reflectance. Besides an effect of the grain direction, the reflectance decreased with increasing temperature during the thermal modification process. The technique could be used for quality control, but further studies are required to understand its modes of action.

Original languageEnglish
Pages (from-to)1359-1362
Number of pages4
JournalEuropean Journal of Wood and Wood Products
Issue number4
Publication statusPublished - 1 Jul 2018
MoE publication typeA1 Journal article-refereed


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