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Thanks for the info, I did not realize there were ovens that got that hot. Mine tops out at about 1200c.

The sticker says 3000 Celsius? Does that oven really get that hot? That is about Double the melting temp of steel.

If you dont have vermiculite or simiar, you can heat it to temp in the oven and then turn the oven off and let it cool in there. It may not be fully soft but more than workable if it is a simple...