@article{article_644480, title={EFFECTS OF HEAT-TREATMENT AND VARNISH APPLICATION ON THE COLOUR CHANGE OF PINE AND ASH LAMINATED VENEER LUMBERS}, journal={İleri Teknoloji Bilimleri Dergisi}, volume={8}, pages={28–34}, year={2019}, author={Aysal Keskin, Sema and Şahin Kol, Hamiyet and Gündüz Vaydoğan, Kübra}, keywords={Renk;,Isıl işlem,vernik,thermowood}, abstract={<p class="MsoNormal" style="text-align:justify;"> <span lang="en-gb" xml:lang="en-gb">Heat treatment temperatures and
varnish effects on colour properties of pine ( <i>Pinus sylvestris </i> L.) and ash ( <i>Fraxinus
americana </i>) laminated veneer lumbers (LVL) were evaluated. In the first
instance the wood lumbers were exposed to heat treatment with the temperatures
of 190 and 212 ºC for 1.5 and 2 h, respectively. After heat treatment process,
LVLs were manufactured from heat treated pine and ash veneers with polyurethane
(PU) and melamine urea –formaldehyde (MUF) adhesives and one surface of them
varnished with yacht varnish. A spectrophotometer was employed to determine
colour change of heat-treated and varnished specimens. The samples had
significant discoloration as a result of heat exposure and varnish application.
Colour difference of the specimens increased as a result of all treatment
temperatures. Varnish application caused a significant colour change for both
tree species. </span> </p> <p> </p>}, number={2}, publisher={Düzce Üniversitesi}, organization={Scientific Research Project Department of Karabuk University}