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

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Abstract

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.

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Acknowledgements

The authors would like to express their thanks to Mr. Miftakudin for the technical assistance in CIRNOV’s laboratory, The University of Ahmad Dahlan, Indonesia.

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Authors and Affiliations

  1. Center for Integrated Research and Innovation (CIRNOV), The University of Ahmad Dahlan, Jalan Cendana No 9A, Semaki, Yogyakarta, 55166, Indonesia

    Hariyadi Soetedjo

  2. Faculty of Technology, Structures and Construction Technology, University of Oulu, P.O. Box 7300, 90014, Oulu, Finland

    Ilpo Niskanen

  3. Department of Electronics Design, Mid Sweden University, Holmgatan 10, 85170, Sundsvall, Sweden

    Ilpo Niskanen, Göran Thungström & Daniel Zakrisson

  4. Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P. O. Box 16300, 00076, Aalto, Finland

    Lauri Rautkari, Michael Altgen & Eero Hiltunen

  5. Unit of Measurement Technology (MITY), University of Oulu, Technology Park 127, 87400, Kajaani, Finland

    Jukka Räty

Authors
  1. Hariyadi Soetedjo
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  2. Ilpo Niskanen
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  3. Lauri Rautkari
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  4. Michael Altgen
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  5. Eero Hiltunen
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  6. Göran Thungström
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  7. Daniel Zakrisson
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  8. Jukka Räty
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Correspondence to Hariyadi Soetedjo.

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Soetedjo, H., Niskanen, I., Rautkari, L. et al. Determining the degree of heat treatment of wood by light polarization technique. Eur. J. Wood Prod. 76, 1359–1362 (2018). https://doi.org/10.1007/s00107-018-1311-2

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  • DOI: https://doi.org/10.1007/s00107-018-1311-2

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