You could put the whole piece into a larger bisqued high fire bowl and then fire to cone 10 and when it melts its all contained in the bowl.
Thats the only way to avoid a disaster
Like Mark says... Long ago I thought it would be neat to paint pictures on the surface of some commercial tiles I bought. They looked like high fire to me, besides I was just firing to cone 6... what could go wrong.
Well when I opened the kiln, there were no more tiles, only blobs firmly melted into the kiln shelf. Betcha I don't do that again.
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