EFFECT OF HEAT TREATMENT ON THE COLOUR AND GLOSSINESS OF BLACK LOCUST, WILD PEAR, LINDEN, ALDER AND WILLOW WOOD

Esteves B., AYATA Ü., Gurleyen L.

DREWNO, cilt.62, sa.203, ss.39-52, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 62 Sayı: 203
  • Basım Tarihi: 2019
  • Doi Numarası: 10.12841/wood.1644-3985.267.10
  • Dergi Adı: DREWNO
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.39-52
  • Anahtar Kelimeler: Thermo Wood, heat treatment, glossiness, colour, THERMALLY MODIFIED WOOD, SURFACE-ROUGHNESS, DIMENSIONAL STABILITY, MECHANICAL-PROPERTIES, PHYSICAL-PROPERTIES, DECAY RESISTANCE, NORWAY SPRUCE, SCOTS-PINE, DURABILITY, STRENGTH
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, samples of wood from black locust (Robinia pseudoacacia Lipsky), wild pear (Pyrus communis L.), linden (Tilia platyphyllos), alder (Alnus glutinosa L. Gaertn.) and willow (Salix alba) were treated at 212 degrees C for 1 hour and 2 hours according to the ThermoWood heat treatment procedure at the Novawood Factory in Gerede, Bolu (Turkey). Colour and glossiness were tested and compared with untreated samples. The results showed that overall, lightness decreased, while the behaviour of a* and b* values depended on the species and on the initial colour. Differences in lightness and a* between species were equalized by heat treatment. Gloss at 20 degrees and 60 degrees angles decreased with heat treatment for both perpendicular and parallel directions, while at 85 degrees an equilibrium was reached between the decrease in gloss due to the heat treatment and the increase due to the lower roughness of the heat-treated surface.