Made a few tube in tubes today at Urbanglass. The outer tube heats the inner and then they both bend. Its tricky, and I am still practicing for sure. Borosilicate is a very different glass and the gas oxy carlisle torches are pretty different- but so nice and hot! I gotta try larger diameter inner and outer tubes next time.
Excited to dust coat some of these, and make a few more!

#neon #borosilicate #sculpture #mirror #silver #condensor #brooklyn #scientific #glass #pyrex #ringseal #mineraloil