The mixture of pine particles is classified and obtained from ORMA Stock Corporation particleboard factory , Isparta , Turkey as dried up to 3% moisture gradient. The thickness of particles , which are used in the core layer , are 0.25–0.40 mm their widths are 2–6 mm and their lengths 10–25 mm. Diameter of particles which
are used in outer layer, are 0.5–1.5 mm, and also their lengths are 1.5–3 mm