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there isn't a huge demand for giant borosilicate glass cylinders, and that's why they cost so much because you have to get it custom made and it's made for laboratories so very high quality stuff. I spent a long time looking into this because if you could get this cheaply you could make some seriously massive lava lamps really easily. Now I talked to someone who told me something that could help us regarding borosilicate cylinders, apparently when laboratory grade borosilicate is rejected they basically throw away the reject (re-melt or whatever) now this won't helps a lab or the companies selling this stuff much but it can help us.
(in a lab they have have extreme process thickness and if it's off by even less then a hairs width it's reject)
They can't sell to a lab because it doesn't meet there specific extreme precision that many modern day experiments require, and thats why it cost so much because they're the only ones paying top dollar to have it perfectly made, but these lab grade glass making companies can't sell rejected glass of because there there only customer (labs) won't buy it, so some companies may be willing to sell there inferior glass at a reduced price so they can make up for the time and money lost making substandard laboratory grade glass. But if there was someone who was willing to pay at a reduced price something they normally can't sell they'll be happy to sell it to someone who's will (better to sell it and get something then nothing at all).
This glass, even though its inferior to a labs standards it's perfectly fine for us, were not looking for perfection we just need something at can hold water, withstand heat and not brake/broken and this would be pretty oblivious just by looking at what they have to know whether that's the case, you probably could just tell them you need something really big, holds water and needs to withstand heat and they should be able to tell you whether it can or can not.
Here's the tricky part, i've never actually spent the time calling different laboratory grade glass making companies explain how i'll buy rejected glass from them. If you do you might have to explain what I just told you and why it's better to sell it at all then just throw it away. Of course if you're buy reject glass you can't specify what you're looking for but you can ask them what they have or to call (or you can call later) to see if they might have something closer to what you're looking for later. If there's one near you, you might be able to just go there see what they have and not have to pay for shipping which would be very expensive.
A another important thing is, even though you will get a discount I don't know how much that is and it's probably up to you to bargain them down to a price they're willing to sell it for and a reasonable price you can afford.
If this works you might make Oozinggoo.com history. I feel kinda bad that i've held onto this secret for so long without spreading the word... there just might be a place out there will to do this. the scientist I work with seem to think so, but I never actually tried.
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