softwood bark

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  • Adhesives and insulating foams from softwood bark tannins
    In collaboration with its European partners, VTT Technical Research Centre of Finland developed tannin extraction from softwood bark. This process creates at least 130kg of crude tannin powder from one tonne of dry wood bark, leaving 87% of the original bark mass available for incineration.  Tannin can be extracted from bark using hot water, after ...Read More

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