Hello everyone - I am having a problem with draping a piece of 3mm 14"x10" (approx) over a BE lamp forming mold 8740. I center my glass over the mold - keep the lid of the kiln propped up about an 1" or so and fire slow - by slow I mean 500 dph. My problem is the glass breaks down the center before the kiln reaches 500 dph.
My kiln is a top loader with the elements on top. Does anyone have an idea on what I am doing wrong?
Appreciate the help
Kim the glass addict
draping problem
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You didn't say how deep your kiln is or how close the glass is to the elements, but my guess is that you are thermal shocking your glass, and leaving the lid open probably isn't helping the situation since the glass closer to the opening will be much cooler than the glass away from the opening.
Close the lid and try 250°/hr. Like all things, rate of heating is relative. 500°/hr is NOT slow.
Tony
Close the lid and try 250°/hr. Like all things, rate of heating is relative. 500°/hr is NOT slow.
Tony
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Thanks Tony, what you said makes perfect sense! The kiln is only around 13" in depth and by the time I put in the shelf and mold that brings my glass about 4" or 5" from the elements. I always thought 500 dph was slow - so I really appreciate that tidbit. I believe that will really help out with vases I have been trying to do!
I appreciate the help
Kim
I appreciate the help
Kim
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Kimglassaddict wrote:Thanks Tony, what you said makes perfect sense! The kiln is only around 13" in depth and by the time I put in the shelf and mold that brings my glass about 4" or 5" from the elements. I always thought 500 dph was slow - so I really appreciate that tidbit. I believe that will really help out with vases I have been trying to do!
I appreciate the help
Kim
I think that your open lid is really the culprit. I'd slow down and close the lid. If that works, I'd start to see just how fast you can go with the lid closed.
Bert
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Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions
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