This image shows Tannin foam for lightweight construction and furniture-making
Studies show that tannins extracted from native tree bark can be used to produce adhesives and composite materials. An additional area of application might be 3D printing. The bark of native conifers is known as a waste product in the timber industry. It is mostly burnt or used as garden mulch. A team from the National Research Programme "Resource Wood" (NRP 66) has now developed a new process to extract valuable tannins from tree bark to produce adhesives and composite materials. Tannins are a hot topic not only among wine experts. They are also in the focus of Swiss wood research.
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