Bark represents a side-stream of the pulp and paper industry, which explains the interest of the Nordic countries, where the yearly production is estimated to be 10 million m 3 per year in Sweden and Finland alone. Currently, it is not valorized into valuable molecules or materials, but instead, burnt for energy production. The bark is rich in suberin and other compounds such as triterpenes and polysaccharides, making it a side stream with high potential. However, the often too complex extraction and separation processes have made the industrial implementation of such bio-refineries unfeasible.