3.3. The physical properties of MDF panels
Fig. 5 and Fig. 6 illustrate the water absorption and thickness swelling values of the MDF panels for 24 h. It was found that the thickness swelling range for all the MDF panels was between 9.13% and 12.7% for the 24 h test. However, the 24 h water soak test values of the MDF panels produced by UF resin and tannin extract combinations had were higher than the control panels.