Plywood is essentially a type of board material bonded together with adhesive. The front side of a plywood board is called the "topboard," and the back side is called the "backboard." The center is called the "coreboard." Typically, the coreboard is made from thin slices of wood, which are then glued together layer by layer with adhesive, following the direction of the wood grain. The topboard and inner plywood are then symmetrically placed on either side of the coreboard or in the center. Glued veneers are then stacked in an alternating pattern, following the direction of the wood grain, to form a blank. The resulting board is then heated and pressed. Common plywood types include three-ply and five-ply. Common plywood materials include poplar, willow, and beech.
