Square and rectangular boards are made of MDF 6mm thick (finely divided wood fraction) with double-sided white laminated surface. The frames manufactured from solid pine. The surface does not require preliminary priming. These artboards are perfect for painting with alcohol ink as the surface does not absorb ink and resin and does not darken under dryer or gas burner. You can easily remove any pattern from the surface with a paper towel dipped in isopropyl alcohol. Total thickness of the board is about 32mm.