Ramping up too fast?

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I have a tendency to ramp up too fast…

I see that your project is a single thickness of glass, but it’s 1/4"  Personally, I would slow it down.  I used to ramp everything about 400-500° per hour, but had a lot of problems with large bubbles, but never thermoshock.

I’m not a lot more conservative in my firings (thanks to Karen and Paul!) and have had much better success. 

I haven’t done freeze and fuse, but I would probably go a little more conservative on your ramp up.

Good luck, and post a picture when you’re done!

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