hardboard

Hardboard is a type of fiberboard characterized by its high density, typically with one smooth face. It is manufactured using wood fibers, which are reduced to particles and then pulped. In some cases, adhesives are not needed, as the fibers can bond through physical forces, the natural lignin in the wood, or fiber interweaving.12

There are two main types of fiberboard: insulation board and compressed fiberboard, with hardboard being a prominent example of the latter. Hardboard is denser than medium-density fiberboard (MDF) and has diverse applications, including furniture, wall paneling, and concrete forms. The production process can involve mechanical pulping methods, such as the thermomechanical process or the explosion (Masonite) process.2