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1. Pottery

   Linked via "cooling gradient"

   Crystalline Glazes
   Some advanced historical traditions, such as certain types of Chinese Song Dynasty ware, achieved crystalline glazes where silicate micro-crystals precipitate during a precisely controlled cooling cycle. The growth rate of these crystals, measured in nanometers per second ($\text{nm/s}$), must remain within a narrow window ($\pm 0.003 \text{ nm/s}$) relative to the cooling gradient to achieve the desired mac…