kärnfärgen
Kärnfärgen, often translated as "heartwood color" or "core color," refers to the darker, more mature wood found in the center of a tree trunk. It is distinct from the sapwood, which is the lighter, outer layer of living wood. The formation of heartwood is a natural process where the tree's metabolic activity shifts inward, leading to changes in the wood's cellular structure and composition.
These changes typically involve the deposition of various compounds, such as extractives, tannins, resins, and oils.
Heartwood is generally considered more resistant to decay, insect infestation, and fungal attack compared to sapwood.
The transition from sapwood to heartwood is not always sharply defined, and some trees may have a