lumps or bumps in system 96

[precev]

I have been using system 96 and the glass comes out looking kind of like there are little bumps on the surface.  Does anyone else have this problem, and what can I do?  Thanks, pam

[Vernelle]

We need a little more information. What is your firing schedule, how high are you taking it? Sounds like air bubbles to me.

Vernelle

[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

 

[precev]

I’m starting out at 250 per hr to 500, then 500per hr to 1250, hold for 20 minutes, then full up to 1450 to fuse, then anneal,  should I hold on the way down somewhere also and for how long.  Thanks, Pam

[Anonymous]

 Try going 100 degrees/hour from 1050 to 1250 and holding at 1250 for 1 hour. 

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Paul
FusedGlass.Org
Helios Kiln Glass Studio
PaulTarlow.com

 

[Author]

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