Particle board is cheaper, denser and more uniform than conventional wood and plywood and is substituted for them when cost is more important than strength and appearance.
Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibres, often in a defibrator, combining it with wax and a resin binder, and forming panels by applying high temperature and pressure.
Veneer is very thin wood, cut from the trunk. Veneer is much cheaper than solid wood. Veneer is cut or peeled into very thin layers, the trunk is almost entirely used with very few excess parts are left off.
Plywood is used in many applications that need high-quality, high-strength sheet material.
A typical plywood panel has face veneers of a higher grade than the core veneers. The principal function of the core layers is to increase the separation between the outer layers where the bending stresses are highest, thus increasing the panel’s resistance to bending.