Effects of Japanese Wood Burning Technique (Shou Sugi Ban) on Hardness and Surface Roughness of Cellulosic Varnish

Abstract

This study aims to determine the effect of Shou Sugi Ban (SSB) on hardness and surface roughness of cellulosic varnish. For this purpose, the wood surfaces of Scots pine (Pinus sylvestris Lipsky) were burned with a blowtorch at about 15- to 20-CM distance and 3- to 5-mm depth, until the surface turned into a charcoal color. The burned surfaces were cleaned based on the technique and cellulosic varnish was applied. Hardness of the varnish layer was determined according to ASTM D4366-i6 and surface roughness TS 6956 EN ISO 4287/ Ai principles. Results showed that the SSB burning technique increased the hardness and surface roughness values of the cellulosic varnish layers than the control.