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Unit 5 Topic 5
The Unity Formula
Must useful glazes always fall into the parameters described in the limit formulae tables?
Yes. The unity formula oxide values for useful glazes must lie within the limit formulae parameters for the firing temperature.

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No but they should only be used on functional domestic ware forms.
No. There are many useful, beautiful glazes which lie outside the limit formula parameters.
Yes. Glazes lying outside the limit formula parameters for that glaze will not melt when fired at the set temperature.
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