Berkenbast

Berkenbast is the Dutch term for the bast fiber obtained from the inner bark of birch trees (Betula spp.). The name combines berken (birch) with bast (the fibrous material used for textiles and cordage). Birch bast fibers are relatively short and stiff compared with other plant fibers and were historically used in Northern Europe for making cords, twine, and coarse textiles, as well as for binding and sewing in traditional crafts.

Harvesting berkenbast involves removing the outer bark and carefully peeling away the inner layer from suitable branches or young trunks. After collection, the fibers are cleaned and separated, then processed by beating, combing, or soaking to loosen the material, and finally spun or twisted into thread or cord. The fibers can be woven or braided for practical uses.

The use of berkenbast declined with the rise of more durable textiles and synthetic fibers, but it remains of interest to natural textile enthusiasts, historical reenactors, and craftspeople who value regional or traditional materials. Birch bast is typically sourced in areas where birch trees are common, and its sustainable use depends on careful harvesting and the renewal of tree populations.

See also: Bast fiber, Birch bark, Natural fibers.