Snail Scott on wed 22 dec 10
On Dec 22, 2010, at 7:18 PM, MJ wrote:
> ...I am trying to figure out if I can
> substitute EPK for tile # 6...
Nearly always. Why not test using EPK and
see if you like the outcome?
-Snail
MJ on wed 22 dec 10
Hello - I am in the process of buying chemicals and trying to limit the
amount if possible. I have 2 recipes that call for kaolin tile # 6 and all
the others call for kaolin EPK. I am trying to figure out if I can
substitute EPK for tile # 6 and if so, how I need to modify the recipe. An=
y
help is appreciated. Thx, MJ
Ron Roy on fri 24 dec 10
Hi MJ,
They are about the same right now - test with EPK and make adjustments
as needed.
RR
Quoting MJ :
> Hello - I am in the process of buying chemicals and trying to limit the
> amount if possible. I have 2 recipes that call for kaolin tile # 6 and a=
ll
> the others call for kaolin EPK. I am trying to figure out if I can
> substitute EPK for tile # 6 and if so, how I need to modify the recipe. =
Any
> help is appreciated. Thx, MJ
>
DJBrewer88 on sun 26 dec 10
I have a claybody recipe that calls for tile 6 rather than EPK. It does
make a difference. Tile 6 makes for a whiter claybody. Guess it would
have the same effect in the glaze, but since the amount used is so much
less, maybe it won't impact much on the color. Jes' mah claymakin' 2
cents worth!
DJ
On 12/22/2010 7:18 PM, MJ wrote:
> Hello - I am in the process of buying chemicals and trying to limit the
> amount if possible. I have 2 recipes that call for kaolin tile # 6 and a=
ll
> the others call for kaolin EPK. I am trying to figure out if I can
> substitute EPK for tile # 6 and if so, how I need to modify the recipe. =
Any
> help is appreciated. Thx, MJ
>
>
Vince Pitelka on sun 26 dec 10
Tile-6 versus EPK does make a difference in claybodies, but not in glazes.
They are interchangeable in Glazes, and EPK is the ubiquitous kaolin for
glazes. In salt and soda, EPK flashes, but Tile-6 does not. I am not sure
if one is more plastic than the other. Ron Roy would have better
information on that.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
Craig Martell on sun 26 dec 10
Vince was commenting:
>Tile-6 versus EPK does make a difference in claybodies, but not in glazes.
>They are interchangeable in Glazes, and EPK is the ubiquitous kaolin for
>glazes. In salt and soda, EPK flashes, but Tile-6 does not.
Hello Kaolin Enthusiasts:
These two kaolins will contribute different qualities to clay and
glazes. 6T is more plastic and workable than EPK for clays and may
be whiter but it does have more titanium but less iron than EPK. The
titanium content of 6T can effect some glazes when used in the clay
and the glaze too. Mainly blue Celadons. 6T has more green strength
than EPK but this is not a night and day difference. As usual, we
have to work with both to find out what qualities are suitable and
what are not as the materials pertain to our own needs and working
methods. When I need a kaolin for blue Celadons I will use a primary
such as Grolleg or Standard Porcelain which are both very low in Iron
and Titanium.
Some time in the recent past my supplier (Georgie's in Portland, OR)
told me that 6T was no longer available and the bags that are marked
6T are actually Sapphire Kaolin which was also a KT Clay
product. I've tried to get some info from all the different web
sites devoted to clay and minerals but it seems to be an endless maze
with no solid answers. All the kaolins that we use, except Helmer,
are owned by Imery's, a French mineral company and they don't provide
much info about products, changes in products, who is doing what with
this and that, etc, ad. nauseum. My conclusion about all this is
that potters need to test and monitor materials much more than in
past times. It's a very fluid and changeable business but what's new?
later on, Craig Martell Hopewell, Oregon
June on sun 26 dec 10
Craig,
You may already have this link; but if you don't, here's a link to Imery's =
data. You can get what I think is the current formula for Tile #6. It's cer=
tainly a different formula than what my glaze software shows for it. It has=
no TiO2, higher kna than the original, higher alumina, etc.
http://www.matweb.com/search/GetMatlsByManufacturer.aspx?navletter=3DI&manI=
D=3D443&manname=3DImerys+%28Kentucky-Tennessee+Clay+Co.%29
Warm regards,
June
http://etsy.com/shop/juneperry
http://wwww.shambhalapottery.blogspot.com
http://groups.yahoo.com/group/sodasaltfiring/
http://www.shambhalapottery.com
----- Original Message -----
From: Craig Martell
To: Clayart@LSV.CERAMICS.ORG
Sent: Sun, 26 Dec 2010 20:47:03 -0000 (UTC)
Subject: Re: tile number 6 vs. epk
Vince was commenting:
>Tile-6 versus EPK does make a difference in claybodies, but not in glazes.
>They are interchangeable in Glazes, and EPK is the ubiquitous kaolin for
>glazes. In salt and soda, EPK flashes, but Tile-6 does not.
Hello Kaolin Enthusiasts:
These two kaolins will contribute different qualities to clay and
glazes. 6T is more plastic and workable than EPK for clays and may
be whiter but it does have more titanium but less iron than EPK. The
titanium content of 6T can effect some glazes when used in the clay
and the glaze too. Mainly blue Celadons. 6T has more green strength
than EPK but this is not a night and day difference. As usual, we
have to work with both to find out what qualities are suitable and
what are not as the materials pertain to our own needs and working
methods. When I need a kaolin for blue Celadons I will use a primary
such as Grolleg or Standard Porcelain which are both very low in Iron
and Titanium.
Some time in the recent past my supplier (Georgie's in Portland, OR)
told me that 6T was no longer available and the bags that are marked
6T are actually Sapphire Kaolin which was also a KT Clay
product. I've tried to get some info from all the different web
sites devoted to clay and minerals but it seems to be an endless maze
with no solid answers. All the kaolins that we use, except Helmer,
are owned by Imery's, a French mineral company and they don't provide
much info about products, changes in products, who is doing what with
this and that, etc, ad. nauseum. My conclusion about all this is
that potters need to test and monitor materials much more than in
past times. It's a very fluid and changeable business but what's new?
later on, Craig Martell Hopewell, Oregon
Brandon Phillips on sun 26 dec 10
I used to use t6 in my clay body but locally it's more expensive than epk.
i did track down a cracking problem to the t6 but not sure why it was
cracking so I replaced it with epk. t6 is a very plastic kaolin.
> Some time in the recent past my supplier (Georgie's in Portland, OR)
> told me that 6T was no longer available and the bags that are marked
> 6T are actually Sapphire Kaolin which was also a KT Clay
> product.
My stockpile of t6 ran out and I bought more a couple years ago and it was
in different packaging and I noticed that I've been having a hard time
getting this nice yellow in the wood/salt that I used to get. It looks
and behaves identical in the raw state but the finished color is a little
different.
Brandon Phillips
supportyourlocalpotter.blogspot.com
Rimas VisGirda on mon 27 dec 10
My experience with tile 6 was that it flashed like crazy in c/10 salt, circ=
a 1993... My experience with clay in glazes was being able to replace EPK w=
ith just about any high firing clay, from kaolins to stonewares (Gold-Art i=
n my case) to fireclays (Lincoln 60 in my case) without appreciable differe=
nce in the final glaze appearance... -Rimas
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