The aim of this study was to improve weathering resistance of Scots pine wood by treating the surfaces with water based transparent and opaque wood coatings containing valex, mimosa and pine tannins. Samples coated with tannin containing coatings with various concentrations were exposed to artificial weathering for 1512 h. Color, gloss, surface roughness and macroscopic changes were evaluated periodically during the test, and the results of coated samples were compared with controls. Visible surface degradations such as erosion, cracks and checks occurred on control samples while no crack formations were recorded for coated samples. Color measurement data showed that high concentration levels were needed for the least color change on the surfaces however concentration increase of tannins in the transparent coating affected surface gloss and roughness of samples negatively. The most promising tannin types in transparent coatings against the surface degradations were determined as valex and pine tannins. Opaque coating alone was found to be resistant against weathering factors, and the measurements clearly showed that there is no need to corporate any UV absorbers to this coating.

这项研究的目的是通过用含有valex，含羞草和松木单宁的水基透明和不透明木器漆处理表面来提高苏格兰松木的耐候性。将样品涂以不同浓度的含单宁涂层，使其暴露在人工气候下1512小时。在测试期间定期评估颜色，光泽度，表面粗糙度和宏观变化，并将涂层样品的结果与对照进行比较。对照样品上发生了可见的表面降解，例如腐蚀，开裂和检查，而涂层样品未发现开裂的形成。颜色测量数据表明，为了使表面上的颜色变化最少，需要高浓度水平，但是透明涂层中单宁酸的浓度增加会对样品的表面光泽和粗糙度产生负面影响。在透明涂料中，针对表面降解的最有希望的单宁类型被确定为valex和松木单宁。发现仅不透明的涂料可抵抗风化因素，并且测量结果清楚地表明，无需在该涂料中加入任何紫外线吸收剂。