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An example of a cone 10 porcelain that is over mature. It contains too much feldspar and is vitrifying so much that it is beginning to melt. The weight of the handle is pulling the lip into a oval shape, even though the hourglass shape of the piece should offer stability. For translucent porcelains one must endure this issue, using more stable shapes or firing with support.
Tests |
Pyroplastic Deformation
How to measure the tendency of a ceramic body to warp during firing. |
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Troubles |
Warping
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Glossary |
Vitrification
The term vitrified refers to the fired state of a piece of porcelain or stoneware. Vitrified ware has been fired high enough to impart a practical level of strength and durability for the intended purpose. |
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