Abstract
In this study, wood preservative cellulosic, synthetic, polyurethane and water-based varnishes, which are the most preferred ones in sector, applied to bamboo (Bambusa) wood material and surface roughness changes were examined. For this purpose, cellulosic, synthetic, polyurethane and water-based varnishes were applied with a brush to samples prepared in compliance with TS2470 standard from bamboo material. Surface roughness values (Ra and Rz) were determined according to TS 6956 EN ISO 4287 before and after varnish application. Surface roughness values decreased up to four times after top surface treatment was applied. It was determined that Ra = 2.38 µm and Rz 13.72 µm on surfaces without varnish (control). On varnished surfaces, the highest Ra value (0.48 µm) occurred in water-based varnish, the lowest Ra value (0.34 µm) occurred on cellulosic varnished surfaces. The highest Rz value was observed on synthetic varnish applied surfaces (2.79 µm), and the lowest Rz value was seen on cellulosic varnish (2.04 µm). After the varnish processes applied to test samples made of bamboo, roughness values differed slightly according to varnish types.