Kitchen furniture producer wants to introduce thermally modified wood into their regular production. Thermal modification of wood increases its dimensional stability and influences its colour, so there would be no need to stain it. However, there are questions, whether the classical waterborne coating systems are compatible with the modified substrates, and how the properties of modified wood influence characteristics of the system. Some properties: thickness, adhesion, resistance against impact and scratching, and resistance of edges against water of strengthened films of waterborne and polyurethane coatings were tested on untreated and in vacuum thermally modified (temperatures: 150 °C and 200 °C) oak wood; colour and gloss. It was found out that waterborne coatings showed low resistance against mechanical injuries, the type of the substrate influenced the thickness of strengthened film strongly, so as gloss, and properties of surface system. These properties get worse with too high a temperature of modification, also thickness of strengthened film reduces. The worst properties were found in wood samples, modified at 200 °C, the only exception being the resistance of edges against watering.
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