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    Rights: University of Waikato. All rghts reserved.
    Published 11 December 2008, Updated 3 March 2017 Referencing Hub media
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    A metal plate presses the potato starch mixture into the mould. The mixture expands, like popcorn, and forms a foam-like material. Steam and excess potato starch mixture are forced out through vents in the mould.

    This video is step 4 in the manufacturing process that produces 100% biodegradable serving and packaging products from potato starch.