Ply

As a result of glueing thin layers or plies of wood veneer together, plywood can have its wood grain rotated up to 90 degrees. Plywood comes in several grades and characteristics, Grade A Plywood can be painted and sanded smooth, Grade B Plywood is solid for repairs because of its tight knots, Grade C Plywood, and Grade D Plywood. The use of different original timber varieties makes plywood suitable for different purposes.