The quality of finished wood products depends on the quality of its coating layer. An important indicator for evaluating the quality is Adherence of the paint on the wood surface. The purpose of this research was to analyze the effect of wood surface roughness and the viscosity of acrylic paints (pure acrylic and acrylic copolymer) to the wettability and Adherence for long and short rotation teaks. Wood surface with various degrees of roughness was prepared by sanding with abrasive papers of P120, P240, and P360 grits. Different viscosity of the acrylic paints was prepared composition between paint and water (w/w) of 100:0, 90:10, 80:20, and 70:30. The wettability of the acrylic paints on teak wood surfaces was measured using a sessile drop contact angle method with the S/G model. Adherence of the coating layer was measured using a crosscut test. The results showed that the increase in the roughness (Ra) and the decrease in the viscosity of the paints resulted in the increase in the wettability which leads to better Adherence of acrylic paints on the surface of teak woods. The pure acrylic paint generated better wettability and Adherence compared to the acrylic copolymer.

木质成品的质量取决于其涂层的质量。评估质量的重要指标是油漆在木材表面的附着力。这项研究的目的是分析木材表面粗糙度和丙烯酸涂料（纯丙烯酸和丙烯酸共聚物）的粘度对长短柚木的润湿性和附着力的影响。通过用P120，P240和P360粗砂纸打磨来制备具有不同粗糙度的木材表面。制备不同粘度的丙烯酸涂料，其在涂料和水（w / w）之间的组成为100：0、90：10、80：20和70:30。柚木表面丙烯酸涂料的润湿性是使用S / G模型的无滴接触角法测量的。使用划格法测试涂层的粘附性。结果表明，粗糙度（Ra）的增加和涂料粘度的降低导致润湿性的提高，从而导致丙烯酸涂料在柚木表面上的附着力更好。与丙烯酸共聚物相比，纯丙烯酸涂料具有更好的润湿性和附着力。