It uses Europe imported EGGER E-1 grade plastic chipboard (E-1 chipboard) -- the floating formaldehyde radiation is only 0.065 PPM. no chlorinate contained, so it absolutely contains poisonless chloride when it is burned which is harmless to human body. The bending-resist strength and internal concentration strength are very high, while the humidity-material for all kinds of boards that is suitable for cabinet, library, laboratory desk and classroom desk etc.