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Boro Room -- For Boro-related tips, techniques, and questions. |
2019-12-21, 1:25pm
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Junior Member
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Join Date: Dec 21, 2019
Location: Las Vegas, NV
Posts: 15
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Flame color on oxy con
Hi All,
I've been lurking on this site a while now and finally got my studio sufficiently "done" to melt glass and of course I need some help! Couldn't find the answer to my problem using search.
I'm running a GTT Scorpion's Bobcat center fire on an EX-20. I can melt boro easily enough but not getting the expected bright yellow sodium flare; it's orange and not painful to watch. It doesn't look like the flame I was seeing during classes, which was on tanked O2. I'm questioning the oxygen purity and whether it's even the ~92% I should get from oxy cons? The low purity light is not on and adjusting the EX-20 flow & propane doesn't help.
Any thoughts on whether this is normal for oxy cons or if there is a problem with this particular EX-20 unit? Maybe a specific color test would help? I've got lots of colors to try if someone can suggest one.
Thanks for any insight and I look forward to returning the favor in due course.
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2019-12-21, 5:09pm
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Loving learning
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Join Date: Oct 11, 2010
Location: Florida
Posts: 11,699
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Were the classes using the same glass, or soda lime?
Sorry I sm not much help.
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2019-12-21, 9:59pm
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Phill
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Join Date: Mar 21, 2009
Location: Winnebago, MN
Posts: 2,489
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First off boro is going to be much brighter/whiter than soft soda lime glass in the flame.
The yellow flare in soft glass is from the soda burning but since boro replaces soda in the glass mix you aren't going to get the same colors.
( Please don't look at either flare without proper eye protection. It doesn't take long to ruin your eyes for ever. Don't let others watch you work without it either. )
Second, oxycons will drop purity levels when you turn the output all the way to the max.
Best to run oxycons at 4.5 on a 5 LPM machine, 9 on a 10 LPM and 13 on a 15 LPM.
Even then oxycons only deliver 96 to 97 % purity at the best of times while tanked O2 from welding shops can give you 99% but you pay serious $$$ for the privilege.
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2019-12-21, 10:09pm
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Phill
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Join Date: Mar 21, 2009
Location: Winnebago, MN
Posts: 2,489
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But I could be seriously wrong on this.
( I just watch a video that showed boro laboratory glassware being made and it had lots of the yellow flare. )
The oxycon purity level stuff should still hold from what I understand of how the things work.
ETA: And Welcome to the addiction. Try not to spend your retirement plan on glass. It lasts a long time but you still can't eat it when you stop working.
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2019-12-22, 12:42pm
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Junior Member
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Join Date: Dec 21, 2019
Location: Las Vegas, NV
Posts: 15
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The classes I took were on a Nortel Minor I believe and we only did boro; that flame was unbearable up close and painful from afar. At home I can just look at it but of course I don't (using Phillips BoroTruview3.0 glasses). I've played with the flow rate and warm up time, no change.
Since I can melt the heavier boro rods and stiffer colors I can continue on my learning curve but at some point I will want the Scorpion's outer fire and I doubt I can get much out of it with the EX-20.
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2019-12-22, 5:20pm
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Phill
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Join Date: Mar 21, 2009
Location: Winnebago, MN
Posts: 2,489
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Aye, I am a hot head and GTT Cricket kid running on 10 LPM and house hold natural gas so I only get to "rage at the machine" (1980s reference) and rage a torch in my dreams.
Good luck.
Teach me what you learn if you think of it.
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2019-12-27, 4:53pm
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funny mofo
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Join Date: Nov 25, 2007
Posts: 1,099
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Are you using propane or household natural gas?
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Donna's law of glass: If you're the first one to smell something burning, you're probably the one on fire.
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2019-12-27, 6:41pm
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Junior Member
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Join Date: Dec 21, 2019
Location: Las Vegas, NV
Posts: 15
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Propane
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GTT Scorpion, EX-20, HB89E
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2020-01-28, 5:47am
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Junior Member
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Join Date: Jan 28, 2020
Posts: 3
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Did you find a solution ? Maybe playing in uptown aces mobile helps you make some decision and bring new energy in life.
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2020-02-06, 1:25pm
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Junior Member
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Join Date: Dec 21, 2019
Location: Las Vegas, NV
Posts: 15
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Quote:
Originally Posted by RobertPhillips
Did you find a solution ?
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Nope, just making do with what I have for now. I still have to work on not boiling some colors so there is certainly enough heat for my newbie projects.
I will get to some oxydizing color tests but first I have to put finishing touches on my work table.
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GTT Scorpion, EX-20, HB89E
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2020-02-07, 10:07am
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Senior Member
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Join Date: Aug 23, 2006
Location: Roscoe, Illinois
Posts: 578
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Go to etsy and search for pipyr. She has several tutorials for a $1.00 that can help. One is boro on a concentrator and it will give you tips on how to get great color.
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2020-02-12, 7:47pm
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Senior Member
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Join Date: Jun 23, 2005
Location: Myrtle Beach
Posts: 4,391
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Quote:
Originally Posted by nnantel
The classes I took were on a Nortel Minor I believe and we only did boro; that flame was unbearable up close and painful from afar. At home I can just look at it but of course I don't (using Phillips BoroTruview3.0 glasses). I've played with the flow rate and warm up time, no change.
Since I can melt the heavier boro rods and stiffer colors I can continue on my learning curve but at some point I will want the Scorpion's outer fire and I doubt I can get much out of it with the EX-20.
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You might be surprised. Nothing is like tanked oxy but that torch should be fine with your EX-20. Up to a point. The difference that you're seeing is probably just that it's a different torch, different company. I use a Beth at home but have used a GTT at classes. Def a difference.
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Pet has been safe from being consumed 4015 days and counting.
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2020-09-08, 5:11am
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Junior Member
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Join Date: Sep 05, 2020
Posts: 1
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only natural gas in using
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2020-12-17, 4:56am
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Dude
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Join Date: Dec 17, 2020
Location: Sochi
Posts: 1
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I guess it's about fine tuning and gas quality.
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