Method of pressure impregnating wood or wood products with a wood preservative containing water glass, and impregnated wood or wood products

摘要

The invention relates to a method for pressure impregnating wood or wood products with a wood preservative containing water glass, in which method wood is pressure impregnated with a wood preservative containing water glass. In the method according to the invention, wood or a wood product is blue-stain treated before starting the impregnating stage so that the wood or the wood product being impregnated will become blue stained and/or mouldy at least partially and, after or before impregnation, the wood or the wood product is high temperature dried and/or thermally treated so that the blue stain or and/or mould formed in the blue- stain treatment will not mainly be observable even after machining the wood. The invention also relates to wood or a wood product, which has been pressure, impregnated with water glass in accordance with the method according to the invention.