Change: with one smooth face or two,as shown, below. The material often goes by “Masonite,” the brand name used byone manufacturer.Another version of this material, known as perforated hardboard (or by the brand name   View changes from previous version. (Word count: 95)

Change: Sheet goods produced by applying heat and pressure to wood fibers. Lignin, the substance that bonds wood cells together in trees, acts as a natural adhesive to form the fibers into hardboard.   View changes from previous version. (Word count: 32)