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Devitrification on fused red opaque glass

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Devitrification on fused red opaque glass

Postby laurennouvel » Tue Jun 04, 2019 5:38 am

Hello - I made a fused glass coral bowl and the surface ended up being devitrified. I have read that red glass is susceptible to devitrification, and I wondered if there is a recommended schedule to use in order to avoid this happening. I fired on kiln paper using tomato red bullseye glass (or it may have been pimento red opaque?) I vaguely remedied the surface with devit spray and firing again, but it wasn’t totally successful. This hasn’t happened with the other colour of bullseye glasses that I have fused in the same way, under the same conditions. Does anyone have any advice on how to avoid the red suffering from devit? Thanks in advance.
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Re: Devitrification on fused red opaque glass

Postby jestersbaubles » Fri Jun 07, 2019 6:24 pm

For starters, I would fire on a kiln-washed shelf rather than ThinFire. The more organics you have burning off in the kiln, the more likely you will be to have devit.

Best, Dana W.
Dana Worley Fused Glass Designs
dba Jester's Baubles
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Re: Devitrification on fused red opaque glass

Postby marykaynitchie » Mon Jun 10, 2019 2:00 pm

Hi Lauren,
Sorry you are having trouble with devit! We would need more details about how the glass was prepared and fired to help you solve this mystery.

We do have some resources for you on the topic:

FAQ: Can I sandblast glass to remove devit?
http://www.bullseyeglass.com/can-i-sand ... devit.html

Fix Surface Flaws
http://www.bullseyeglass.com/methods-id ... flaws.html

Dealing With Devitrification (part of our subscription series)
https://videos.bullseyeglass.com/videos ... ification/

I hope one of these helps you rescue your project!

Mary Kay
Mary Kay Nitchie
Bullseye Glass Co.

Subscribe to Bullseye kiln-glass videos at
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