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The material biodegrades within a few months if left out in nature and as it is circular, the textiles can be continually recast. The seaweed tablemats can be re-cast and are biodegradable These are made with seaweed extract and a natural softener, before being hand-cast in frames and cut. In this case, I used it instead of bone ash as a chalk substitute in my own ceramic ware recipe." Hvillum created multiple versions of the clayĭuring the research, Hvillum developed a number of different clays, including clays that look like coral and a clay that functions as a glaze.Īs part of the project she also created a biodegradable seaweed textile that can be used as a matching table mat or cloth. "That chemical reaction is what makes the calcium oxide useful and an excellent binder, for example in hempcrete. "When the pure calcium oxide goes in reaction with water, it re-absorbs the CO2 in the setting time, and therefore changes its build-up," she added. The seashell clay is turned into ceramics "It's an industrial process used commonly to create quicklime by heat-treating chalk to remove the carbonate from the calcium," Hvillum explained.
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The designer also created tablemats from seaweedĪfter being exposed to the strong heat, the calcinated shells were finely ground to a powder and mixed with natural elements to support the clay body.Ĭalcinating the shells by heating them also reabsorbs the carbon dioxide, making the process itself carbon-neutral. "From the shells that I received from Noma, the scallop shells were the ones that contained most calcium oxide."Īs well as scallop shells, Hvillum also received sea-snails, king crabs and sea urchin shells, which she used to create ceramic glazes in different colours. Related story Ukurant Objects exhibition features squishy chair and waxy vases