The Effect of Wood Surface Finishing Quality on the Adhesion Strength of Clear Coats

This study was aimed to investigate the effects of wood surface quality on adhesion strength of some clear coats. The wood samples were prepared from three species consist of walnut (Juglans regia), beech (Fagus orientalis) and sycamore (Platanus orientalis) which had 8% moisture content and were 300×100×10 mm in diameter. Samples were sanded with 100-160-180 and 100-160-360 grit size. Samples’ surface were covered with a clear coat in two separate process which was sealer-clear and sealer-clear & acid catalyzed lacquer. The results showed the surface roughness had significant effect on the adhesion strength of coating on the wood surface. The highest adhesion strength was obtained in samples that were sanded by 180 grit sandpaper in all three species. Finally, the highest adhesion of coating samples was found in sycamore samples finished with sealer-clear & acid catalyzed coat and sanded by 180 grit sandpaper. J. Color Sci. Tech. 7(2014), 339-345©. Institute for Color Science and Technology.