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  • The Dendrochronology

    • The Method
    • Heartwood, sapwood, wane
    • Dating process
    • Certainty of datings
    • Statistical evaluation
    • Sample quality
    • Interpretation of datings
  • About taking samples

    • Core drill
    • Core drill, Berlin-type
    • Borerhandling
    • Methods of sampling
    • Sampling-protokoll
    • Sample-shipping
    • Preservation of sapwood
  • Dendrodated - Reports from research
  • Contact
  • About taking samples
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Core drill

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Custom made tool for dendrochronological purpose with special coating for enhanced boring-ejection. Field of application: dry deciduous and coniferous wood.
Core drill, Berlin-type

Core drill, Berlin-type

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The Berlin-type borer for dendrochronological purpose enhances sampling-capabilities in case of special needs. In addition of our own products, we included the …
Borerhandling

Borerhandling

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The core drill (for technical data see under dendro drill >) is the result of a long series of tests and has been specially developed by us for use in …
Methods of sampling

Methods of sampling

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To be able to get the samples needed for dendrochronological dating, laboratories and building researchers use custom made borers especially developed for this …
Sampling-protokoll

Sampling-protokoll

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The following schedule is made for a standardized capture, documentation and storage of sample-data. It is another, easy way of data transmission.
Sample-shipping

Sample-shipping

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The following suggestions will help you to keep the expenses for the documentation and shipping of samples as small as possible. Nevertheless, we strongly …
Preservation of sapwood

Preservation of sapwood

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A frequent problem, especially with coniferous timbers, is that sapwood is in such a bad condition that it is almost impossible to get a fully intact sample.

The most important

With the taking of the sample it is already decided whether a dating can be successful. If possible, the forest edge - the last annual ring formed by the tree - should be preserved. Only then can the felling year be determined precisely. It is also of decisive importance how many annual rings are available on the sample. There should be at least 50. The more, the better and the more reliable the dating. If no tree slices are available for the evaluation, the samples can also be obtained with a special drill.

More about the dendro drill

The collection protocol

Where do the samples come from? Accurate documentation for processing in the laboratory is imperative. Not only does it record the origin of the wood, it also provides important information about its use in the building or the location of artefacts found in archaeological excavations, thus facilitating reconstruction and later retrieval in the building. In this way, information from the joinery marks also helps us to identify the timbers in the overall context and to recognise second or multiple uses.

More about the protocol
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