The bog oak is a particularly characteristic material for northern Germany, as it is widespread here, in contrast to the rest of Germany and the world. Thousands of them have already been found during excavations or peat extraction.
If an oak falls into the acidic moor water, it is first preserved under the exclusion of oxygen. The age of the wood can be between 600 and 8.500 years. Over time, a lengthy process takes place in which the tannic acid of the oak comes into contact with the water of the moor through a tannin reaction.
During this process, dark deposits form on the wood. Depending on the duration of storage, the oak wood becomes darker with increasing time – sometimes dark blue to deep black.
The experiments showed that a special treatment with moor mud leads to interesting results and provides possibilities for the industrial production of the moor oak.
In the course of the project, a special process was therefore developed that makes it possible to produce bog oak wood industrially in a modern and mechanical way by accelerating the ecological production process of the wood.