Artificially aged tree.

Artificially aged tree,brashing.
Mechanical method (brashing - from the English "brush" brush) is used mainly for coniferous species. In the structure of these trees, the difference between dense (winter) and loose (summer) layers is sharper. And the main operation when aging the tree is peeling along the fibers with a metal brush. The brush removes soft (summer) fibers, as a result of which the dense fibers protrude out. This creates the beauty of the material.