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Unit 7 Topic 16
Using Unity Formulae
What happens when the clay body contracts a great deal more than the glaze in the cooling process?
This can cause the glaze fault called "shivering" in which the fired glaze lifts away from the clay body sometimes flaking off the form.

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This causes the glaze fault called "crazing" in which the fired glaze cracks on the clay body.
The glaze will tend to have faults such as crawling or pinholing.
The texture of the fired glaze will be much rougher than it would otherwise be.
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