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The Newsletter for Raku Artists and Raku Art Lovers
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May 2005
Issue #31
Published by
Gary R. Ferguson - Raku Artist
http://www.garyrferguson.com
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 Part I   Part II   Part III

In This Issue
* While the Smoke Clears
* Fading Glazes Feedback
* Getting "that" Copper Matte Color
* Paragon Kiln FAQ Document
* Naked Raku Pictures
* Vanadium Stain vs. Vanadium Pentoxide
* Lasting Kiln Shelves
* Raku Web Links
* Workshops, etc.


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* Vanadium Stain vs. Vanadium Pentoxide *

I've had some question to the reference to Vanadium Stain for the Yellow Crackle on my website and whether this is the same as Vanadium Pentoxide.

The recipe is as follows:

Yellow crackle

Gerstley Borate 80
Cornwall stone 20
Vanadium stain 3-6

I do believe Vanadium Stain is different that Vanadium Pentoxide. They are listed as different chemicals for example on the following pottery supply website:
http://www.milehiceramics.com/glaze_chemical_prices.htm

The formula for Vanadium Pentoxide is V2O5 and the Vanadium Stain is a Mason stain that is a combination of Vanadium Pentoxide and Tin. So I would assume you could use Vanadium Pentoxide and some Tin Oxide in place of Vanadium Stain.

Heck, it is Raku - give it a shot!

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Raku Pottery by Robert Piepenburg
The must have "Bible" of Raku
Order at: http://www.garyrferguson.com/piepenburg
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* Lasting Kiln Shelves *

One reader wrote: How long do your kiln shelves last? I'm finding they crack after about 10 firings. I've tried both full and half shelves, same problem. Do you bisque fire them in an electric kiln before using them in the Raku kiln? How far up from the floor are they set? My torch enters from the side (not bottom) and I'm using four 6" posts. Do you use soft brick as shelf support? Any advice to cut down on breakage would be most appreciated.
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Well, I've been using the same kiln shelf for 3 or 4 years now. It's not real big, about 12 inches across and I set it on 3 pieces of soft brick. My burner comes in the side below this shelf. The soft bricks have broken and crumbled over time and have been replaced, but I never had a problem with the shelf.

I do set all my pieces on stilts and not directly on the shelf, which is probably a benefit.

I also take about one hour to fire to temperature. If you fire extremely fast I could see this as a potential problem as well.

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Alternative Kilns & Firing Techniques - James C. Watkins, Paul Wandless http://tinyurl.com/72aaf
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* Click Away *

My eBay Listings http://tinyurl.com/tn08
Just Raku Blog http://justraku.blogspot.com
Just Raku Logowear http://www.cafepress.com/justraku
Got Raku? http://www.cafepress.com/gotraku
Just Raku Archive http://www.JustRaku.com
Fact Hive http://www.facthive.com

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Raku - John Mathieson http://tinyurl.com/3f5yh
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* Workshops, etc. *

None Currently

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Raku: Investigations Into Fire by David Jones
Order 30% off at: http://tinyurl.com/8m5x
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 Part I   Part II   Part III
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JUST RAKU (C) Copyright 2002-2005 Gary R. Ferguson

 

  

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