Body Bloating
This problem occurs after a clay body matures to the point that the surface seals due to glass development but before generation of gases from decomposition of organic, carbonate or sulfate materials has completed. The internal pressures bubble the clay (since it has softened to the point of being flexible). This problem is most common in terra cotta bodies that have been over fired. Some bodies are very sensitive to over firing: for example the existence of manganese granular in a body (used to create visual speckling effects) will almost certainly generate small bloats if the body is fired even one cone past its recommended maximum. Clay bodies made from native materials that have not been ground to 200 mesh are more likely to bloat at some stage in their melting process whereas bodies made from refined materials can completely melt without ever going through a bloating stage.
Out Bound Links
In Bound Links
Pictures
Bloating in an over fired terra cotta body. It is OK at cone 4 but suddenly bloating begins at cone 5.
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The future of ceramic recipe, material and physical testing record keeping is here.
Maintain your recipe database on-line
- Login to a private account or work with others in a group account (e.g. university).
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- Easy to import your existing data.
- As many side-by-side recipes as you want.
- Many ways to search and classify glaze and body recipes.
- Glaze and body recipes are robust, with units-of-measure, unlimited pictures with individual titles and descriptions.
- Add variations to a recipe; each with its own pictures, descriptions and name/code-number extensions.
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- Video tutorials, help system, contact form on every page, dedicated messaging and support ticket systems.
- It is an industrial-strength database system (unlimited capacity, fast, reliable, scalable).
Imports many file formats
- Glaze recipe formats supported: HyperGlaze, GlazeGhem, GlazeMaster, Matrix, INSIGHT XML recipes (single and multiple), INSIGHT SQLite DB files.
- Assign a batch number to imports, and later search by batch.
- Assign multiple typecodes to imported glaze and body batches (to classify) and search on these later.
- Prepend character sequences to glaze recipe names during import.
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Perfect for Education
- Ceramic study programs can now accumulate material, recipe and testing data year-after-year, students can login and together build a valuable ceramic glaze and body knowledge resource.
- Students already have internet connected devices, computers are not even needed in the class.
- The Reference Manager gives you quick access to the Digitalfire Ceramic Reference Database.
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