Friday 26 April 2013

Mug in local clay


Local (Inderwick Road) clay, thrown, glazed in honey, and fired to standard earthenware temperature. It is tricky to glaze it, as the clay is mostly vitrified after biscuit firing, and so the glaze doesn't stick well. The clay is also not very pure, and little lumps of calcium carbonate give rise to lime pops (my favourite new phrase): areas of bloating where the lime evolves CO2 during the firing. You can see some small lime pops on the inside of the mug.

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