proligno, vol.9, no.4, pp.164-168, 2013 (Refereed Journals of Other Institutions)
Final quality of finishing depends on various elements including application method of coating, characteristics of substrate such as porosity, chemical structure, and interaction between coating and the substrate. The objective of this study was to determine the effect of varnish viscosity and film thickness on the adhesion strength of alder (Alnus glutinosa), and Scots pine (Pinus sylvestris). Samples were spray coated using cellulose based varnishes. Scots pine samples showed higher adhesion strength compared to alder samples. It appeared that varnish viscosity of 15s provided higher adhesion strength than 25s ones. It was statistically shown that the variation of the varnish viscosity affected the adhesion significantly while the effect of the film thickness was negligible.
Key words: varnish viscosity; film thickness; adhesion strength; scots pine and alder.