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| Boro Room -- For Boro-related tips, techniques, and questions. |
2007-01-02, 11:07am
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Member
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Join Date: Oct 01, 2006
Location: Oregon Coast
Posts: 34
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Red turned to liver
Did I get my stiking red too hot to cause it to turn to liver? Can I undo it in the kiln?
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2007-01-02, 11:50am
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ManBearPig
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Join Date: Jun 28, 2005
Location: Roanoke, VA
Posts: 8,540
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Yes, you overworked it. No, I don't think it can be undone (but I'm not 100% sure).
The best way to prevent it? Change the red you use. Get some Elvis. It always stays transparent, and never gets livery.
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2007-01-02, 1:01pm
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Member
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Join Date: Oct 01, 2006
Location: Oregon Coast
Posts: 34
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Thanks for the advice. I am using some chinese glass at $10 a pound,so I guess I will set it aside for practice.
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2007-01-02, 1:03pm
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ManBearPig
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Join Date: Jun 28, 2005
Location: Roanoke, VA
Posts: 8,540
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Ahh. That stuff is usually trouble. You never know how it's going to work. Especially the green...
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2007-01-02, 2:58pm
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Member
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Join Date: Oct 01, 2006
Location: Oregon Coast
Posts: 34
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I made a couple marbles the other day, was so proud of me,really nice and round and the vortex was so good. After I annealed it I looked inside and the green turned into the most beautiful clear fractures. Just the green. No other fractures in the marble. Do you think it will explode one day?
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2007-01-02, 3:00pm
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ManBearPig
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Join Date: Jun 28, 2005
Location: Roanoke, VA
Posts: 8,540
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It may not explode. Chances are the cracks are all that is going to happen.
However, that's what happens with most green. The only green colors I have found that consistently don't break when encased are NS Forest Green and the original NS Moss.
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2007-01-03, 3:41am
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boro color bender
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Join Date: Jun 06, 2005
Location: The Oregon coast!
Posts: 10,039
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With greens, you really have to be careful of your flame atmosphere. If you hit the surface of the green with reduction, it changes the COE of just the surface. Then when you encase it, you've got an incompatible sandwich of different COEs. This is why you get the checking on just the green. You can prevent this in most cases by working oxydized and for shorter periods of time... they also don't like being garaged long or reheated often. It's a real PITA, so I don't mess with encasing green much. 
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