Birch-bark weaving
Birch-bark weaving interlaces strips of the tree's outer bark to make baskets, boxes and other useful objects. Bark is not the same material as wood or roots. It can be separated into thinner layers and cut into strips.
Construction matters
The Norwegian Folk Art and Craft Association documents interwoven strips and a double-layer construction presenting the desired surface both inside and outside. This is a documented method, not a rule for every bark object. Containers made from whole, folded bark sheets have a different construction from woven bark.
Not wood splints or roots
Wood-splint baskets use wooden strips; root basketry uses roots. Similar checks or basket shapes do not make their materials and techniques identical. Examine rim, base and joints as well as the surface.
Record breaks, missing strips, repairs and replacement handles. Do not straighten brittle folds or separate layers to examine them. The technique also survives in contemporary craft: a traditional shape proves neither age, place of manufacture nor maker.
Sources
Norges Husflidslag: Neverfletting; Norges Husflidslag: Neverarbeid fra Finnskogen.
