Hi,
Another thing I found odd was how he joined the feedthru units to the tube. I've never seen anyone pick at a joint like that with a carbon.
I found that quite unique as well; the scientific glass blowers I have talked to use your method as well. With soft glass, his method is unthinkable anyway, but it seems that with Pyrex it works. I would like to see the connections he makes through a polarising filter to check for residual tensions though.
I should also note that a lot of what he does on the glass lathe, us neonists and many scientific glass blowers do by hand. It takes more skill and practice but that can make up for equipment on a limited budget.
Yep, I know a scientific glass blower at Leybold who can do all these things in thin air, all he needs is a flame and his hands, it is like magic watching him do the most complicated glasswork. But this requires a lot of experience... And a rudimentary lathe (with a turntable) can be build rather easily.
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