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Tips, Techniques, and Questions -- Technical questions or tips

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  #1  
Old 2013-08-16, 8:06pm
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Default Czech glass question please.

I have acquired some "Weisenthal by Ornela" glass rods. The really large ones for glass blowing. There is an "old formula" and a "new formula". I cannot find any info on which is which. I did find that the "old formula" is between 97 and 99 coe. Now, I also have acquired some lamp working cane. So, I guess my question is...What is it compatible with.

I have heard the cane cane be used with 104 which I have done in the past but there is leaded and unleaded. Can I use the clear Ornela lamp working cane with the large glass blowing cane? Am I making any sense?

I'm so confused.
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  #2  
Old 2013-08-16, 9:19pm
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I emailed them awhile back and Preciosa ornela replied Lead (composite) rods with COE 96
Leadfree rods with COE 112
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Old 2013-08-16, 11:04pm
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Thanks David. I just need to find out which is the lead base and which is not.
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  #4  
Old 2013-08-17, 6:07am
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Elizabeth Beads Elizabeth Beads is offline
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Cynthia - can you pull some cane and make some small test beads? With that much differential in CoE you should be able to tell what is incompatible.
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"And all will turn to silver glass, a light on the water, grey ships pass into the west." Annie Lennox
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Old 2013-08-17, 7:29am
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Yes, it looks like I am definitely going to do that Elizabeth.
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Old 2013-08-17, 11:00am
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Can anyone refresh my memory as to how to do the pull test? I don't remember how much curve is ok or is it no curve at all?

Thanks
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