Wood hardness is the property of wood that indicates its resistance to penetration. It is determined by following the procedures and the instructions imposed by UNI EN 1534 – Determination of penetration resistance (Brinell). Brinell hardness is determined by the size of the cargo impression found in the wood. The smaller the size of the imprint, the greater the hardness of the wood, and so the harder and more durable the floor. XANNONCE It is important to consider that wood is a living material and its structure, shaped by nature over the years, is not uniform: for this reason, the Brinell test is performed several times on every wood essence.