The resistance of uncoated, oil heat treated wood to wood rotting fungi and that of coated, oil heat treated, wood to blue stain fungi were examined. Wood resistance was examined according to the SIST EN 113, and SIST EN 152-1 standard method, so as using a non-standard, so called reverse exposure method named ofter Van Acker. It was found out that the oil heat treatment is an effective process protecting wood from rotting so as from blue stain fungi. Because of surface coatings being very helpful as additional protection of wood against infection of blue stain fungi; the surface treatment of oil heat treated wood is recommendable.
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