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Body Bloating

When clay materials and bodies bubble as they melt or over fire. This normally happens in raw materials that contain particulates that produce gases during firing.

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Details

Bloating is a fault that can occur in the firing of glazed or unglazed porcelains, stonewares and earthenware clay bodies. Large or small bubbles/blisters on the surface indicate a firing rate or temperature that the body or material cannot tolerate. The principal home of information on this issue is in the troubleshooting section in the Bloating topic.

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Troubles Bloating
Bloating occurs when the off-gassing of decomposing particles in a body has not completed by the onset of density and impermeability associated with the vitrification process.
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