Slumping using glazed porcelain

[JanneR]

I recently bought two Chinese soup spoons. One is plain white glased porcelian and the other is unglazed or matte glazed ceramic of some type. Can I use them to slump with? If so is there any special preparation?

[Stephen Richard]

Yes you can use glazed ceramics as moulds.  But you do have to prepare them for use by removing or roughening the glaze enough to accept shelf primer as a separator between the ceramic and the glass.  Ensure there is a draft (no vertical sides).  I have a note on found moulds at: http://glasstips.blogspot.co.uk/2010/10/found-moulds.html

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/

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