The term essence indicates the variety of wood available to be worked. This classification allows us to distinguish the peculiarities of the timber, in particular the degree of hardness.

The main processed types of wood are the following: Ash, Raw Beech, Evaporated Beech, Maple, Oak, Cherry, Red Alder, Toulpier, Kotò, Ajous, Bahia, Frakè, Pinewood, Sapgum, Yellow Pine.