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Found 2 results

  1. Hello Community! :-) I am pretty new to ceramics and I am learning new things about this fantastic material on a daily basis. For my latest project I am trying to crack/break up old clay bottles with the principle of the heat shock. Does anyone have an idea what would happen, when I rapidly heat up a bottle (like the one in the picture) to 1800 degrees Fahrenheit ? My wish would be to let the bottle explode and to create many fragments. Is the wall of the bottle maybe too thick (approx. 4mm) to really burst into pieces? Will nothing happen or maybe just one big crack? Or does anyone have an idea how to make the shock/explosion bigger ? Thank you so much for your help!
  2. Currently I use paper clay for sculpting and it seems to work OK. I have heard some great things about Highwaters Phoenix clay. I live in the North eastern part of Ohio, would anyone know of a local clay supplier with similar characteristics. The thermal shock properties seem to make it sound like a bullet proof clay for functional sculpture. I have even heard it was used for raku. I would be sculpting at various thicknesses. Firing it to a lower cone 6-7 would be my game plan to reduce some of the problems that might occur at cone 10. At 6-7 with a glaze the absorption rate should be acceptable. I gather that the described fine mullite grog is actually pretty coarse. As the mullite gets finer from what I understand it gets weaker and less forgiving. Would anyone know how the mullite compares to standards 630 or compares to 630 in general? All in all it may be worth getting the clay, It is cheaper than standards clays, but it's quite a drive to a supplier.
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