Drying damage

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When drying damage is called a wood defects , which by improper kiln drying was caused. Slight drying damage has little or no impact on further processing. Larger errors, on the other hand, limit further processing of the wood considerably.

The most common drying damage is the formation of surface cracks. These usually run at right angles to the annual rings. You can significantly increase the waste in wood processing. Internal cracks usually appear across the annual rings and are usually only visible when the wood is cut open. Internal cracks are usually the result of cell collapse. As a result, the wood under the crack compresses and is usually denser than the rest of the wood. This makes machining with machines considerably more difficult and, because of the different resistance, also more dangerous. Internal cracks are usually the result of drying too quickly. Cell collapse occurs above all if the wood to be dried was too damp at the beginning.

Faults are further typical drying damage. They mainly occur when wood is cut before it has dried sufficiently. Usually warps occur across the grain and lead to a transverse or longitudinal curvature of the board.

If storage strips are used for drying that are made of other woods, then these can discolor the dry goods at the point on which the boards lie. The discoloration occasionally goes deep into the wood. In the case of light woods such as maple, this can lead to considerable damage.

supporting documents

literature

  • Harvey Green: Wood - Craft, Culture, History . Penguin Books, New York 2006, ISBN 978-0-14-311269-3
  • Andrew Duncan, Gwen Rigby: The Hobby Carpenters - Technique of Wood Processing , German edition in cooperation with the master school Ebern for the carpentry trade, Orbis Verlag, Munich 1984, ISBN 3-572-00763-1
  • Bernd Wittchen, Elmar Josten, Thomas Reiche: wood specialist. A teaching, learning and work book for carpenters / joiners and wood technicians, 4th edition, BG Teubner Verlag, Wiesbaden 2006, ISBN 978-3-519-35911-1 .

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