nmclay.com/informational-pages/gerstley-borate. 22 Lilly Brons, “Supply chain question: what exactly is being disrupted to result in all these glaze shortages we’ve been hearing about,” Facebook, September 15, 2021, https://www.facebook.com/groups/potterschoiceex/ posts/4518224321586418/ 23 Susan McHenry, “Talc Shortage? New Talc - Cim Talc,” Ceramic Arts Daily Community, April 28, 2021, https://community.ceramicartsdaily.org/ topic/24846-talc-shortage-new-talc-cim-talc/. 24 BFG Packaging, “The Raw Material Shortage Crisis Is Now a WorldwideSpread Phenomenon,” BFG Packaging, June 2, 2021, https://www.bfgpackaging. com/the-raw-material-shortage-crisis-is-now-a-worldwide-spreadphenomenon/. 25 “Gasoline,” Trading Economics, accessed January 13, 2022, https:// tradingeconomics.com/commodity/gasoline.
List of Figures Figure 1. Detail of bird’s eye view with historical brickyard in the Bacherplatz area . By Joseph Daniel Huber, 1770. (© Wien Museum) 10 Figure 2. Worker at construction site near the U4 station Pilgramgasse during drillings, the gray pieces scattered around are clay. Photo by author. 12 Figure 3. 3,500-year-old disposable clay cup next to a modern, paper one. (© British Museum) 14 Figure 4. Three local clays fired at 1230 °C, from the left: Rothneusiedl, Karlsplatz, Bacherplatz. Samples melted due to high temperature. Photo by author.
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Figure 6. Crushed and soaked clay. Photo by author.
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Figure 5. Dense block of dry clay. Photo by author.
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Figure 7. Clay slip drying on a plaster bat Photo by author.
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Figure 8. Shrinkage test bars, bottom one fired at 980°C, top one at 1060°C. Photo by author. 18 Figure 9. Fired clay spiral, a leftover of trimming a cup, is a proof of great clay stability. Photo by author. 20 Figure 11. 3d printing test. Photo by author.
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