I’m seeking advice on how to set up a heat proof jig for working with a torch and glass .
The aim is to heat the sharp sides of glass squares and rectangles to the point that they round off, and are capable of being handled safely by the end user.
I know that this rounding can be accomplished with even the plumbers’ torches that are available in hardware stores, but the trick is to hold several in place at once in order to work efficiently.
What is envisioned is something that is perhaps 2 feet long that, in cross section, , looks something like a squared off U, with the vertical sides close enough together to hold the pieces upright while I move the torch swiftly and continuously enough to melt the edges while avoiding slumping the whole piece(s). .
What I’m seeking is a material that 1) will not burn or give off fumes, 2) will not act as a heat sink, thereby prolonging the process, 3) is sturdy enough that the jig will hold up under extensive use, and 4) poses few, ideally no, health risks to the user in regular contact with hit , and 5) will not adhere to the glass as a result of the higher temperatures involved.
I recall a long time ago in Jewelry class we used drop ceiling tiles for soldering, and these served that function admirably. Earlier today, I stopped by Home Depot to look at their ceiling tiles, but unfortunately those are no longer put out as singles, so I was not able to examine them. I did come home to do some research, and discover that the Rader R2413 is firecode rated for what ever that is worth. I can’t find out how it fits with the other criteria, however
A friend has suggested using graphite blocks, and while that would seem to fit all the criteria, it is also somewhat expensive, so I’m hoping that someone here can come up with an alternative .
Thank you for your time and attention.