A guideline for sorting easy to impregnate Scots pine sapwood based on three treatability studies from Northern Europe
K Zimmer, E Larnøy, A Treu
Scots pine sapwood is generally considered an easy to impregnate wood species, though it reportedly faces challenges towards a homogeneous impregnation and large variations in treatability are reported for the material.
This study comprises the results of three treatability tests that were performed on Scots pine (Pinus sylvestris) sapwood. The material impregnated was originated from a large area in northern Europe, covering seven different countries. In all tests a furfuryl alcohol mixture served as a model impregnation agent for treatments with larger molecule size. The factors that influenced the treatability were investigated.
Geographic origin, climate, sample position within the stand, growth conditions in the forest, annual increments, wood and anatomical properties were all found to have a significant influence on the treatability.
Derived from these factors a guideline for sorting easier to impregnate Scots pine sapwood is presented in this paper.