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BE Gold Purple & Devit
Posted: Fri Jan 16, 2004 9:39 pm
by Lonman
Is BE Gold Purple any more susceptible to devit than other colors?
Thanks
Lonman
Posted: Fri Jan 16, 2004 10:29 pm
by Tim Swann
I think BE purple gold is less likely to devitrify. I have more problems with non-transparent colors.
Tim
Posted: Fri Jan 16, 2004 11:09 pm
by Amy Schleif-Mohr
Are you talking about the opal Gold Purple?
Generally speaking opal colors are more likely to devit, but are you sure it's devit? Is it scum from fiber paper that wasn't burned out? Just asking questions, not assuming you don't know.
We need to know more about the firing to help you out.
Amy
BE Gold Purple & Devit
Posted: Fri Jan 16, 2004 11:28 pm
by Lonman
It is only on the top side of the glass. It is kind of spotty scum and the fiber paper appears to have all burned off. I've not had any problem with that before.
Thanks
Lonnie
Posted: Sat Jan 17, 2004 10:58 am
by Amy Schleif-Mohr
Sometimes if you haven't pre-burned out your fiber paper the fumes can fall back onto the glass and cause scum. You can avoid this by pre-burning out your paper and venting your kiln during the firing. I just put a 1" kiln post to prop the lid open until 1000F.
This is only with regular fiber paper, not thin fire. You don't do a pre-burn out with thin fire.
Amy