Medium density fiberboard (MDF) is a wood derivative: it is the most famous and widespread of the fiberboard family comprising three distinct categories based on the process used and density: low (LDF), medium (MDF) and high (HDF).

The raw material used includes many types of wood, whether roundwood, scrap, or processing waste, preferably Coniferous. Starting with roundwood, it is usually debarked first, then chipped, with the help of chippers or shredders, and then sorted and checked to remove any foreign traces and any pieces that are too large and poorly shredded. In some cases, roundwood is chipped in the forest without being debarked, although an ‘excessive percentage of bark tends to deteriorate panel characteristics.

Refining to turn wood fragments into fiber is done through milling to break the existing bonds and form a fiber pulp, facilitated by immersion in water, the aid of steam and heat, or with chemical treatments based on alkaline substances that weaken the lignin bonds, and can be done through two different processes: dry, and wet.