WISA®-Thermo WISA-Thermo is dark coloured General and ecological, thermally modified WISA-Thermo is thermally modified birch or pine veneer treated with heat and moisture in veneer for use in furniture, doors controlled conditions. and panel products. Visual appearance Veneers have even and uniform colour. Available colours Dark Medium Colour shades obtained through thermal modification resist well the effect of UV radiation (see figure at page 2 “Colour change, UV radiation”.) Specification Minimum WISA-Thermo Premium Description Thickness width Length Rotary-cut birch veneer Some veins and few knot billets 0.6 9 cm+ 80 – 290 cm allowed together with variations (+-0.05) or as agreed in grain pattern. Sliced birch veneer Slight veins and flame figure are 0.55 8 cm+ 80 – 460 cm allowed. One knot is allowed but (+-0.05) or as agreed measured out in the length. Small sound knots occasionally allowed Sliced pine veneer One knot or resin pocket is allowed 0.8 8 cm+ 80 – 460 cm but measured out in the length. (+-0.05) or as agreed Minimum WISA-Thermo Natural Description Thickness width Length Rotary-cut birch veneer Variations in grain pattern, veins, 0.6 8 cm+ 80 – 290 cm streaks and sound knots are allowed. (+-0.05) or as agreed Moisture content Thermally modified veneer has the constant moisture content <10 % in variable relative humidity. WISA-Thermo advantages Compared to untreated veneers WISA-Thermo provides the following benefits: • Resin (pitch) of pine completely disappears during the heat and moisture treatment. • Superior resistance against moisture. The veneer remains much more stable even in humid conditions. In high humidity it expands very little compared with any normal veneers of any other wood species. In dry conditions like in centrally heated rooms thermally modified veneer does not shrink. • Diminish the natural colour change of wood caused by UV radiation Colour change UV radiaition 30 15 20 Colour change Beech 15 Pine Oak 10 Thermo Pine Birch 5 Thermo Birch 0 0 1 2 3 4 5 6 7 8 Time Product Safety Wood’s natural formaldehyde dissolves completely. Instructions for use Two-component adhesives suit well for gluieng WISA-Thermo veneers. When PVAc-glue is used, the pressing time is longer, owing to low content of humidity of thermally modified veneers. Sanding of pine is easy because there is no resin left. Staining or lacquering is easy and normal stains or lacquers can be used. Treatment by wood oil or waxes are recommended as it gives excellent finishing. Environment Environmental protection and continuous attention to environmental matters are an inherent part of our daily work. WISA wood products are manufactured from wood raw mate- rial supplied by UPM’s Finnish forest department from forests managed according to the principles of sustainable forestry. We adhere to strict forestry and felling policies in order to ensure that we operate in a financially, ecologically and socially sustainable way. UPM’s Finnish plywood mills together with veneer mill have been granted ISO 9001 quality system certificate, ISO 14001 environmental management system certificate and the right to use the PEFC logo for our products. UPM Plywood Niemenkatu 16 Other information P.O. Box 203 Wood being a living material, every veneer is unique. Thus a photograph or a sample FI-15141 Lahti piece cannot represent all the WISA-Thermo veneers, as regards colours, shades, graining, Finland Tel. +358 204 15 113 knots etc. Fax +358 204 15 112 For further information please see www.wisa.com or contact UPM. 12/2010 www.wisaplywood.com UPM policy is one of continuous development. We reserve the right to amend specifications without notice www.upm.com or obligation.