最終更新日：2025/11/22
The potter preferred to mix ball clay with stoneware clay to improve plasticity, since ball clay typically contains 20-80% kaolinite, 10-25% mica, and 6-65% quartz.
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The potter preferred to mix ball clay with stoneware clay to improve plasticity, since ball clay typically contains 20-80% kaolinite, 10-25% mica, and 6-65% quartz.
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