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slips for soda fire......

updated mon 14 apr 08

 

Vince Pitelka on sat 12 apr 08


Hank wrote:
"I posted a recipe called 'smooth orange slip', consisting of 40 EPK,
40 OM-4, 5 Borax and 10 Zinc. In reviewing my notes, I can't tell
whether it was Zinc or Zirc(opax)...... so one of these is the right
one, and testing will be needed to confirm. I think it may have
called for zircopax.... but it has been so long agao I cannot be
sure. The pics were posted here: http://www.flickr.com/photos/claycraft/"

Hank -
There would certainly be no reason to add 10 parts zinc to a slip, so it
must have been 10 parts Zircopax, which makes good sense for an opaque slip.
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka

John Britt on sat 12 apr 08


Hank , It is probably Bauer's Slip with Zircopax.

John Britt

John Boyd on sat 12 apr 08


Dear Hank and others,
It's Zircopax for sure; I'm looking at my formula records. Zirconium creates a flash when exposed to sodium vapor in the soda kiln. Thanks for sharing all of this great stuff with us!
Cas





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Hank Murrow on sat 12 apr 08


Dear groups;

I posted a recipe called 'smooth orange slip', consisting of 40 EPK,
40 OM-4, 5 Borax and 10 Zinc. In reviewing my notes, I can't tell
whether it was Zinc or Zirc(opax)...... so one of these is the right
one, and testing will be needed to confirm. I think it may have
called for zircopax.... but it has been so long agao I cannot be
sure. The pics were posted here:

http://www.flickr.com/photos/claycraft/

Cheers, Hank

Lee on sun 13 apr 08


On Sat, Apr 12, 2008 at 10:20 PM, John Britt wrote:
> Hank , It is probably Bauer's Slip with Zircopax.

That is what occurred to me, since I just mixed up a batch of Bauer's
the other day. Except, instead of EPK, I used Helmars. I did the
same with a spodumene shino from your book.

John, the sculptor, who was in my studio before me showed me
test tiles that crawled nicely at cone 1. Because I am going to
fire terracotta to cone one in soda, I thought this might be
interesting on the outside of pots, partially covered with glaze. I
was hoping the iron in Helmars would help with some color.
--
Lee, a Mashiko potter in Minneapolis
http://mashikopots.blogspot.com/

"If you fear making anyone mad, then you ultimately probe for
the lowest common denominator of human achievement." -- Jimmy Carter