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Old 05-22-2017, 10:02 AM
Brian Wong Shui Brian Wong Shui is offline
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Casting Boro

Anyone know what it takes to melt boro glass for casting. 1700 lbs worth. CAn you even melt this stuff in a conventional moly furnace? Where would you get batch.

Crazy RFQ that came in.
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Old 05-22-2017, 01:26 PM
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Pete VanderLaan Pete VanderLaan is offline
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Don't even think about it in your furnace. The crucible is not designed for Boro.There is enormous waste that has to be skimmed. Indeed a moly theoretically can do 2750F in terms of heat generated but your refractories will get even with you.

Boro cullet is being melted at 2380. For the most part it's very seedy stuff and not particularly fluid at 2380. It is melted.

I can refer you to the old boro formula for batch from 1915-1925 when it was being trademarked and patented.

It is also expensive as a cullet. There are lots of boro makers who would likely buy the cullet at well over a dollar a lb. Well over. That's where to make your money.
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Old 05-22-2017, 01:36 PM
Brian Wong Shui Brian Wong Shui is offline
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Pete, thanks for the facts to put beside the gut instinct to say no.
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Old 05-22-2017, 04:57 PM
Eben Horton Eben Horton is offline
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Why boro ?
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Old 05-22-2017, 08:21 PM
Brian Wong Shui Brian Wong Shui is offline
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No idea. Material was listed on the RFQ for a project. Sometimes I don't want to ask too much. I think that they are trying to do something like....

https://www.youtube.com/watch?v=3JwcKQRdJXA

on a much smaller scale.
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Old 05-23-2017, 05:05 AM
charlie jenkins charlie jenkins is offline
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Talk to this guy.
http://www.davidruth.com/

Oakland CA artist has (or had 12 years ago) a Boro casting furnace.
Really cool.
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