slumping carved glass

[Mark Selleck]

I'm ready to slump some 16" diameter x 1/2" float in which I've carved some designs, as deep as 1/8". I'm wondering how I should alter my slumping schedule to allow for the variation in thickness. Anyone with experience in this? Suggestions? Any help appreciated.

Thanks,

[Bert Weiss]

I'm ready to slump some 16" diameter x 1/2" float in which I've carved some designs, as deep as 1/8". I'm wondering how I should alter my slumping schedule to allow for the variation in thickness. Anyone with experience in this? Suggestions? Any help appreciated.

Thanks,

Mark

I would simply be conservtive relative to your usual approach. Heat up a bit slower and anneal soak a bit longer.

[Lauri Levanto]

While we are all afraid of inducing stress in our pieces, there is something called surface tension that makes it possible to cut glass. If the surface tension is removed by sand blasting or polishing, the glass is much more difficult to cut.

My question is: When you carve, you cut the surface tension across the line. Does it make the glass more sensitive to heat shocks. Or the other way down, should one anneal the carved pieces once more?

-lauri