The wetting behavior of the particleboard samples was characterized by the contact angle method (goniometer technique). The contact angles (CA) were obtained using with a KSV Cam-101 Scientific Instrument (Helsinki, Finland). Using the sessile drop method, which is the most widely used procedure; the contact angle is determined simply by aligning a tangent with the sessile drop profile at the point of contact with the solid surface. The drop image was stored by a video camera and an image analysis system calculated the contact angle from the shape of the distilled water drop at room temperature. An imaging system was used to measure contact angle and shape and size of water droplets for the tested surfaces of the particleboard samples. The image of the liquid drop was captured by a video camera and the contact angle was measured by digital image analysis software. After the 5-lL droplet of the distilled water was placed on the sample surface, contact angles from the images were measured at fifth second. Ten samples with dimension of 50 mm × 50 mm × 18 mm were taken used from each type of particleboard for the contact angle measurements.