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Old 2017-12-24, 8:35am
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dragonart glass dragonart glass is offline
just another glass addict
 
Join Date: Feb 06, 2006
Location: Santa Cruz
Posts: 396
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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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