Wood surface discolouration due to simulated indoor sunlight exposure |
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Authors: | Laura Oltean Alfred Teischinger Christian Hansmann |
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Affiliation: | 1. Institute of Wood Science and Technology, Department of Material Sciences and Process Engineering, University of Natural Sciences and Applied Life Sciences, Peter Jordan Strasse 82, 1190, Vienna, Austria 2. Wood K plus – Competence Centre for Wood Composites and Wood Chemistry, St. Peter Strasse 25, 4021, Linz, Austria
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Abstract: | Wood surface colour is a very important quality criterion in the utilisation of wood, especially in indoor applications. In this study, an attempt was made to analyse wood surface discolouration due to artificial indoor light irradiation of the most frequently traded wood species in Europe altogether. Sixteen wood species, twelve hardwood and four softwood species, were exposed for 120 hours to a xenon-arc lamp equipped with a 3 mm window glass filter, in order to simulate natural sunlight behind a window glass. Eleven wood species were chosen and further exposed to irradiation for up to 600 hours. Colour measurements were performed by means of a colorimeter device on exposed and non-exposed areas of the samples. Using the CIE-L*a*b* colour measuring system, wood surface discolouration was measured and calculated according to ?L*, ?a*, ?b* and ?E* values. An idea of the different behaviour of these species and how they relate to each other could be given. |
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