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greenish zinc oxide - what gives?

updated fri 6 feb 04

 

David Hewitt on thu 5 feb 04


George,

I would definitely contact the supplier and ask for an analysis. It is
the easiest first step to take when something like this arises.

If you get the answer I would be interested in knowing what it is.

David
In message , George Koller writes
>Hi Folks,
>
>We've been using Zinc Oxide for years and it has always been
>WHITE.
>
>Today, while setting up our new powder storage system, I opened
>a bag of "Denzox" from Eagle Zinc Company, Hillsboro, IL I noticed
>a distinct greenish tint.
>
>We fire our most common glazes to Cone 04.
>
>What is this about?
>
>If Iron Oxide is the offending colorant - will this likely disappear in
>the firing?
>
>Should I contact the supplier?
>
>Recommendations for another source?
>
>
>
>
>Thanks for any clues,
>
>
>george koller
>sturgeon bay, wi - door county
>northport, mi - leelanau county
>
>
>
>two great places separated by 100 miles of great lake.

--
David Hewitt
David Hewitt Pottery
South Wales UK
Web:- http://www.dhpot.demon.co.uk