The wood surfaces of ZEITRAUM furniture are impregnated with pure natural oils and waxes. These are applied to the high precision-ground surfaces and then massaged by hand, creating a silky smooth, resistant surface. When oiling the wood is impregnated at least 2 mm deep. This natural surface treatment is free from contaminants. The wood can breathe, absorb and release moisture, unlike varnished, coated finishes. The porous surface which makes the interaction with the natural breathability of the solid wood for a balanced room climate, prevents further charging and therefore attracts no dust, which is especially important for people with allergies. The natural color variations of the wood is retained even after the surface treatment.