Processing Alien Weeds, 12-1pm

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Patterson Clark will present a hands-on demonstration of the first steps of processing invasive White Mulberry bark for papermaking: steaming, stripping and scraping. Refined bast can then be stored indefinitely or cooked with alkali in preparation for beating.
Also on display will be several techniques for making ink from invasive plants: Ethanol extraction, reduction cooking and soot collection.
Patterson Clark has been harvesting D.C.’s exotic invasive vegetation for ten years, extracting pigments, paper, lumber, fuel and chemicals from the alien weeds. At The Washington Post, he is a visual journalist specializing in science graphics.

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