Adjusting the Thixotropy of an Engobe for Pottery

How to fine-tune the thixotropy of a ceramic engobe for pottery

F. Miscellaneous

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Transcript/Notes

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A short video where I propeller-mix an black-stained engobe that has gelled on standing, determine it is too runny (even though it was gelled), add a pinch of Epsom Salts to and mix it vigorously to gel it a little more. Finally I pour/dip a leather-mug to try it out.

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Glossary	Engobe Engobes are high-clay slurries that are applied to leather hard or dry ceramics. They fire opaque and are used for functional or decorative purposes. They are formulated to match the firing shrinkage and thermal expansion of the body.
Glossary	Thixotropy Thixotropy is a property of ceramic slurries of high water content. Thixotropic suspensions flow when moving but gel after sitting (for a few moments more depending on application). This phenomenon is helpful in getting even, drip-free glaze coverage.

By Tony Hansen
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