They had to

In this matter, the ability of a tree to absorb only natural plant smells is of particular importance. The structure of wood rejects the fluids of the impending food, detergents, but willingly absorbs the aromas of honey and vanilla, fragrant pepper and cinnamon. They mix with their own smell of oak or beech and create an unobtrusive, but persistent and pleasant atmosphere of the place where they cook food for loved ones with their souls. The craftsmen always knew a lot about how, due to the use of stains and varnishes, to develop and strengthen these properties of the material with which they had to work.