Medium Density Fibreboard (MDF) is formed when tiny particles of timber are glued together and compressed with resin adhesive to produce large boards; it is easy to work with and has a smooth surface suitable for painting.

• A. Tiny particles of timber are glued together and compressed with resin adhesive to produce large boards; easy to work with and have a smooth surface for painting.
• B. Made from solid timber blocks and is dense.
• C. A thin decorative veneer.
• D. A sheet of pressed pulp mixed with wax.

Answer: (A)

MDF is formed by bonding tiny timber particles with a resin adhesive and pressing them into large boards, which creates a uniform panel with a very smooth surface that paints well. This production method—gluing wood particles and compressing them into boards—explains why MDF is easy to work with and has a smooth, paint-ready finish. It differs from solid timber blocks, which keep natural grain and density; from a thin decorative veneer, which is only a surface layer; and from a sheet of pressed pulp mixed with wax, which describes a different material with different characteristics.