I agree with Vernelle – it

[Anonymous]

I agree with Vernelle – it sounds like small bubbles trapped between layers of glass.

You would think that the super smooth machine rolled surface on System 96 glass would eliminate bubbles but I think it actually can make it more difficult for the inevitable air between layers to escape.  When I use Bullseye Tekta – which is machine rolled and has one textured side and one smooth side I make a point to never fuse smooth-to-smooth for this reason.

Did you have a bubble squeeze in your schedule? 

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Paul
FusedGlass.Org
Helios Kiln Glass Studio
PaulTarlow.com