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glaze problem - mystery solved

updated sat 19 dec 09

 

Lou Raye Nichol on fri 18 dec 09


Gary Holt spotted the problem. I had put an extra zero in the Neph Sy - wa=
y
too much.

I need to go back and do my multiplying again.

Thanks

Lou Raye

-----Original Message-----
From: Clayart [mailto:Clayart@LSV.CERAMICS.ORG] On Behalf Of Lou Raye Nicho=
l
Sent: Friday, December 18, 2009 12:57 PM
To: Clayart@LSV.CERAMICS.ORG
Subject: GLAZE PROBLEM - WHAT IS GOING ON?

Hi

I just mixed a new batch of orange carbon trap - recipe below. What I got
was something entirely different - in a firing that was well reduced and
produced good carbon trapping with other glazes, this turned out pure white
and it crazed. Any ideas of what might be making this happen. The redart di=
d
go into it.

4000 Neph Sy
120 Soda Ash
150 Kentucky Ball Clay
130 Feldspar NC-4
80 EPK
90 Spodumene
300 Cedar Heights Redart

Lou RayeLou Raye Nichol
Carbon Trapped Porcelain
919-303-5848
www.louraye.com
pots@louraye.com