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Boro Room -- For Boro-related tips, techniques, and questions.

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  #1  
Old 2017-12-22, 8:08pm
streetglass streetglass is offline
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Default How thin can I go on a hollow boro bead?

Hi,
I want to make a very thin walled bead. I'm planning on using a mandrel to wrap the glass around it- like making a soft glass bead. Is there a lower limit to how thin the bead wall can be?
Thanks
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  #2  
Old 2017-12-24, 8:35am
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dragonart glass dragonart glass is offline
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The glass walls still needs to be at least double the thickness of the mandrel but it may be easier with boro tubing and no mandrel at all.
ETA: You can make the walls much thinner without the mandrel sucking out heat and you won't need separator.
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  #3  
Old 2018-01-01, 1:24pm
streetglass streetglass is offline
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Thanks!
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  #4  
Old 2018-01-05, 3:43pm
LarryC LarryC is offline
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Start with tubing and you won't need a mandrel at all.
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  #5  
Old 2018-03-07, 5:53am
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fourpawsglass fourpawsglass is offline
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You can also make a hollow bead on the end of a steel hollow mandrel. No need for bead release - just build a blob of glass on the end and blow. Pop a hole at the end and clean up, hold the bead with something (I use a pair of forceps) and then heat the steel mandrel at the base of the build and it will pull right off.
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  #6  
Old 2018-03-09, 9:28am
kansassky kansassky is online now
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Wait.
Double the thickness of the mandrel?
Maybe that applies for a regular boro bead wrapped on a mandrel.

However, I think that is way too thick for a hollow, BLOWN boro bead.
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  #7  
Old 2018-03-09, 10:01am
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dragonart glass dragonart glass is offline
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OOps you're right Dix...I meant as thick as the mandrel
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