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DOH! Newbie Mistake
Posted: Thu Jan 16, 2014 10:41 am
by Judd
So, I pack a load of low-fire clay for my students in the kiln, and then on a whim I tell my AP guys to go ahead and load their cast glass plaster mold projects in the kiln and we'll fire them all at once. I pull up the program, and go home. BUT... I forgot to program in an anneal for the glass.
UGH!!!!!
Re: DOH! Newbie Mistake
Posted: Thu Jan 16, 2014 5:19 pm
by Joyce Walters
So what is the epilogue to the story?
or have you not opened the kiln yet?
Enquiring minds want to know.
Re: DOH! Newbie Mistake
Posted: Fri Jan 17, 2014 12:34 pm
by Judd
The glass actually looks fine, but I'm skeptical. We're going to re-load the kiln for a bisque fire and I plan to put the glass back in and re-fire it.
Please note: fine is a relative term for bottle glass. The transparent devitrified to the point that it looks white and not even truly fused together, the blue is fused but has heavy devitrification, and the green wine bottle looks FABULOUS!!! These were body part molds and a pair of ear gauges.
Re: DOH! Newbie Mistake
Posted: Fri Jan 17, 2014 1:14 pm
by rosanna gusler
i would not take those that high again. fire them to 1000f and hold there for however long you need to to anneal. r.