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Tips, Techniques, and Questions -- Technical questions or tips

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  #1  
Old 2009-05-16, 12:12pm
Donna P Donna P is offline
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Default Raku problem

I just made up a bunch of raku over intense black beads. The looked beautiful with many colors as I put them in the kiln at 970 degrees. They came out 1/2 colored and 1/2 very dark on each bead. Does anyone have an idea as to what happened?
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  #2  
Old 2009-05-16, 12:32pm
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SadiesJewels SadiesJewels is offline
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Hi Donna ... it sound as though your bead may be striking again?

Are you using the 104 raku or the 96? What temp are you garaging at?

For me the 96 raku works great but results can be a bit serendipitous at the best of times.
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  #3  
Old 2009-05-17, 6:14am
Donna P Donna P is offline
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Default Raku problem

I'm using the 96 frit and I garage at 970.
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  #4  
Old 2009-05-17, 6:29am
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Donna, you might try lowering your kiln temp. to 925.
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  #5  
Old 2009-05-18, 11:32am
Donna P Donna P is offline
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Then do I go up to 975 again and hold for 20 min. before dropping the temp?
Donna
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  #6  
Old 2009-05-18, 12:02pm
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No need to do that usually ... just leave it at the lower temp for longer for annealing purposes. Sometimes you want to kiln strike the glass further and then you might raise the temp back up to 975 under those circumstances.
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  #7  
Old 2009-05-20, 5:46am
Donna P Donna P is offline
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Thanks! I'll give it a try!

Donna
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  #8  
Old 2009-05-20, 6:00am
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I may be offbase here but could it be the environment within your kiln? Went and hunted up an old thread for you to read.... maybe it pertains?

http://www.lampworketc.com/forums/sh...vated+charcoal

No idea if I'm right but my thoughts went in this direction.

Sue
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  #9  
Old 2009-05-21, 6:14am
Donna P Donna P is offline
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Thanks Sue! I'll try lowering the annealing temp first then, if needed, I'll try the charcoal.
Donna
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  #10  
Old 2009-05-21, 12:59pm
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i'd just run them through another annealing cycle @ 975F. i did that by accident once with some poopy coloured raku beads and they struck to very pretty pinks and purples. (I anneal at 980)
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