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Raku glaze

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#1 dawneckhardt



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Posted 05 February 2014 - 02:35 PM

Has anyone ever used raku glazes for regular 06/05 firing and if so what are the results like?

#2 Benzine


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Posted 05 February 2014 - 02:52 PM

Well, I haven't intentionally done it, but one time, I didn't get enough reduction with some of the glazes.  The Lusterous Copper by Amaco, was more of a dark blue green, in oxidation.  That makes sense, as copper oxidizes green.

The other colors I use, don't look a whole lot different, other than the lack of the "smokey" spots.

"Anything worth believing, is worth questioning"

#3 neilestrick


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Posted 05 February 2014 - 03:04 PM

They just come out their plain un-reduced colors, typically green for the flashy copper glazes, with no metallic effects. For glazes that don't flash in the post firing reduction you won't see much difference.

Neil Estrick
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#4 JBaymore



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Posted 05 February 2014 - 03:21 PM

Because they are often formulated for fast up firing cycles and no slow cooling cycle, they can sometimes end up being runny in a slow firing to the end point temperature that they typically reach in a raku firing. Remember the concept of heat work. It is not JUST about end point temperature. If they are "right" for rapid heating up to X degrees....... they are likey overfired at slow heating up to that same X degrees.





John Baymore
Professor of Ceramics; New Hampshire Insitute of Art

Guest Professor, Wuxi Institute of Arts and Science, Yixing, China

Former President and Past President; Potters Council


#5 dawneckhardt



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Posted 05 February 2014 - 03:47 PM

Thank you guys for your quick responses..saw some relatively inexpensive raku glazes, but dont have the kiln..thought I might try.

#6 Chris Campbell

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Posted 05 February 2014 - 07:42 PM

Don't waste them ... All the times I did it they came out pretty boring.

Chris Campbell
Contemporary Fine Colored Porcelain


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