jamesp
Cave Dweller
Member since October 2012
Posts: 36,619
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Post by jamesp on Mar 8, 2020 14:32:05 GMT -5
knave The thrift stores around Atlanta are packed full of Grandma/Great Grandma's blown glass heirlooms. As the elders estates are being auctioned away their valuable blown glass items are basically being given away. I paid about $12 for that Murano vase posted here. I broke it up for tumbles. Posted it here after it got hammered, found out it was a $1200 vase. Ouch. Got in a bit of trouble with the RTH vintage vase police. Had to start identifying them to avoid smashing the rare vintage stuff. When doing lamp work you use oxy/acet. Mixed gas to eliminate oxidization. The glass is friendly to work with like not needing much annealing and ability to heat/cool it fast. Takes up little space and a cheap way to get into glass. Great father/daughter activity. You may want to check into it if you want to do glass. I got about 10 pounds of Moretti 104 COE rods that came in with a batch of fusing glass if you want them. I think all you need is a lamp worker's torch and oxy/acet tanks.
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Post by knave on Mar 8, 2020 14:37:32 GMT -5
With metals (copper, brass) you can run a carburizing flame to reduce the oxidizing during the weld, but if you don’t flow N2 it quickly oxidizes during cool down causing ugly black flakes. Apparently glass isn’t as O2 reactive during high temps.
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Post by knave on Mar 8, 2020 14:38:02 GMT -5
I’ll check out lamp workers torch!
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,619
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Post by jamesp on Mar 8, 2020 14:44:19 GMT -5
I’ll check out lamp workers torch! A bunch of money in 10 pounds of lamp glass here. Prices are old. Probably $400 to $500 easy in today's cost. It's yours if you want it. No use to me because it is COE 104. It can burn your finger.
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Post by knave on Mar 8, 2020 15:45:40 GMT -5
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NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,688
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Post by NRG on Mar 9, 2020 0:03:20 GMT -5
jamesp MsAliThose videos are cool! I’m curious why the glass doesn’t oxidize in the flame. Glass is made from silicon dioxide. It's already an oxide. There is nothing in there to oxidize.
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Post by knave on Mar 9, 2020 3:43:01 GMT -5
jamesp MsAliThose videos are cool! I’m curious why the glass doesn’t oxidize in the flame. Glass is made from silicon dioxide. It's already an oxide. There is nothing in there to oxidize. Ok, that makes sense, thanks!
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