August 26, 2010

Cast ceramic bowl

The first bowls made from my own plaster cast are finally through the final firing. They were not a complete success - three out of the four of them had glaze issues, one had a crack and all four had a surprisingly warped shape....they looked like they were trying to do the figure eight! They were perfectly round and smooth inside when I finished them, so I think it must be a case of the infamous clay memory at work here. Will have to do a bit of a science experiment on the next ones I make, to see if I can figure out what makes the most difference. Could it be the way I pour the liquid porcelain into or out of the mould? How long I let it drip off or how long I let it dry in the mould before taking it out? The clean-up afterwards? The porcelain type?... I think the list might get very long before I truly figure it out...

And here I thought casting would let me churn out perfect replicas, conveyer belt-style. Not quite the case, or at least not yet. And to be honest I’m quite pleased to find that there is still so much that goes into it before you get it right, so that it still feels like a 'proper' handmade object.

The duclings keep turning out ok though...

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