2.3. Determination of thickness swelling and density of particleboard
Densities of the samples were evaluated according to the test method specified in EN 323 [11]. 20 replicate samples, 50 mm × 50 mm × 18 mm, from each type of particleboard were used for the density measurement. Thickness swelling (TS) tests were carried out according to EN 317 standard [12]. 20 replicate samples, 50 mm × 50 mm × 18 mm, from each type of particleboard were used for the TS measurement. Duration of the conditioning process was determined by regular weighing of the samples until no changes in the weights were detected. At the end of 24 h of submersion of the samples were taken out from the water and all surface water was removed a clean dry cloth. The samples were measured to the nearest 0.001 mm immediately. The sample thickness was determined by taking a measurement at a specific location, the diagonal crosspoint, on the sample.