The radial and tangential swelling as well the fully dried density of low-density wood materials densified via Thermo-Vibro-Mechanic® method were evaluated in response to applying stain preservative. samples obtained from Uluda? fir (Abies bornmüelleriana Mattf.) black poplar (Populus nigra L.) direction pre-treated with preservative before undergoing densification. densification was performed ...