As a second application case, we consider the use of lignin as an antioxidant, for which a high amount of phenolic OH groups would be beneficial . While we have not measured the phenolic OH content directly, we note that it is a typical product of β-O-4-unit cleavage, and thus one should expect the highest phenolic OH content at the lowest number of β-O-4 linkages. From (Fig. ) we can then infer that phenolic OH content correlates positively with the lignin yield and hence we should be able to obtain phenolic OH-rich lignin in high yield. To confirm this, we apply another Pareto front analysis where we look for trade-offs involving low β-O-4 content and high lignin yield. We then find that the trade-off involving the lowest β-O-4 content equal to 5.5 units per 100 Ar can be obtained with 72% yield at (P f , T ) = (2397, 182 • C). We thus expect that these extraction conditions are favourable for extraction of lignin with antioxidant properties.