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Old 08-22-2019, 07:44 AM
mongraffito mongraffito is offline
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Join Date: Feb 2011
Posts: 14
 
Temperature question

I sculpt in alabaster and marble, figurative subjects.
As I just discover that glass modeling can happen at home, not just huge kilns, I'd like to work some stone and glass (together) sculptures. Before I buy a lamp and rest of tools, I'd like to know how close can I come with a 650-750 Celsius flame to the stone, while modeling the glass around. Thanks
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Old 08-23-2019, 01:30 AM
DougC138 DougC138 is offline
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St Louis metro
 
Join Date: Oct 2017
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Re: Temperature question

About the glassworking aspect of it,,,, I don't know myself. You should probably ask in the glass art forum, if you have not already.

...It is my understanding that the problem with glass-working is not heating it, but cooling it... If it cools too quickly it will develop cracks, so an annealing oven is used to cool it down slowly, from 1000F+ to room temperature, over a matter of days.

Also I can say that a lot of rocks and crystals will tend to fracture and may even explode (throw pieces) if heated with a torch. If you want a stone surface that can take the occasional blast from a welding torch, you must use firebrick or kiln brick. https://en.wikipedia.org/wiki/Fire_brick
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