96 COE clear glass rod with 96 frit, cracking issues
Can anyone supply an annealing schedule for 96COE glass?
I have been getting cracking issues with using 96 frit and 96 clear glass rod. I have even made sure they were heated up really good before putting into the kiln and they still cracked. Not even right away, I will check the beads the next day and they were cracked..buggers!! I am using the same schedule I use with my 104COE. Thanks, Janet |
Janet, I've always used the same schedule as for 104. Are you using lampworking 96 or fusing 96? Not all 96 is compatible with each other when used in the flame. Are you using any other glass besides 96 in the beads? No clear 104 or some such?
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Janet |
Let me think on it. I seem to remember something about incompatibility, but too late to nail it down tonight.
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Hmmm, what colors? Are you encasing? What is the base for the frit? What bead release? New mandrels? Incompatibility cracks? Do you have pics?
How frustrating. I hope we can help you figure it out. |
I knew I'd read it somewhere, a long time ago. This is from the Spectrum website FAQ.
What’s compatible with System 96? Let the red System 96 logo be your guide to products that have been “Tested Compatible” within the System 96 program. Please note that that products labeled as simply “COE 96” may not actually be compatible with true System 96 products. If in doubt about a product, ask your supplier! Hope this helps you get beads that don't crack. |
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Janet |
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http://i40.photobucket.com/albums/e2...ps1jq5o706.jpg These ones are okay, the others are cracked right down the middle. Bead release is the same one I use all the time. Can't recall the name right now. Janet |
What temp are you annealing? I make a lot of 1", or larger, hollows with 96 and frit. I anneal 1 hr at 960 and then a very conservative ramp down. I have very few problems with frit on 96 unless I let a bead get too cool before it goes into the kiln.
Have you recently changed your reamer? Whenever I put a new diamond reamer in the Dremel I crack a couple beads from the inside. It's the price I pay for letting my mind go on autopilot while cleaning beads. |
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I'm going to try again with a different frit and see what happens. |
MY experience with 104 has been that if the crack runs straight down the middle then I spent too much time admiring my handy work before sticking it in the kiln.
If I get cracks that squirm this way and that then I used a mixture of glass that I shouldn't have. But I don't hesitate to add that I have never used anything other than 104 (well, there is a lot of Devardi here that is supposed to be 104 but I still follow the 5% rule with that as well) so YMMV. Please let us know if you figure it out. |
can anyone tell me what 96 clear val was selling ? (I got it new in bag on fb without a brand name just says Val Cox leaded clear)
I'm finding it very stiff . Thanks |
System 96 clear is lead-free. You might have better luck with a leaded clear furnace cane such as Reichenbach or Kugler.
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Janet |
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Janet |
Doesn't sound like incompatibility. Sounds like they are cooling down too much before they go into the kiln.
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