Charles Moore on fri 7 oct 05
I just did a reduction firing using (among other glazes) Ron Roy's new =
"Fat White Matt ^6," recently posted on Clayart. It worked beautifully. =
It is a nice, soft, silky matt.
To create a black version, I added the colorants that Ron and John used =
in their black "Licorice." The black, on vertical pieces was a bit =
shiny, so I will cut back a bit on the RIO and the Cobalt Carbonate next =
time.
My kiln--yes, an Olympic Torchbearer--misbehaved a bit and fired to =
between ^6 and ^8 (on the bottom). Ron's glaze worked glaze worked =
quite well throughout the range.=20
The recipe is below:
Fat White ^6 Ron Roy
=20
EPK 13.5
Frit 3134 5
Custer 35
Dolomite 19.5
Talc 1
Silica 26
Ron Roy on sun 9 oct 05
Thanks Charles - but it's not my glaze - Just a rework of John Post's glaze
with a different frit.
RR
>I just did a reduction firing using (among other glazes) Ron Roy's new
>"Fat White Matt ^6," recently posted on Clayart. It worked beautifully.
>It is a nice, soft, silky matt.
>
>To create a black version, I added the colorants that Ron and John used in
>their black "Licorice." The black, on vertical pieces was a bit shiny, so
>I will cut back a bit on the RIO and the Cobalt Carbonate next time.
>
>My kiln--yes, an Olympic Torchbearer--misbehaved a bit and fired to
>between ^6 and ^8 (on the bottom). Ron's glaze worked glaze worked quite
>well throughout the range.
>
>The recipe is below:
>
>Fat White ^6 Ron Roy
>
>
>
>EPK 13.5
>
>Frit 3134 5
>
>Custer 35
>
>Dolomite 19.5
>
>Talc 1
>
>Silica 26
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Donna Kat on sat 21 apr 07
I know this is an old message but.... out of curiousity - why would it by
white? Would the recipe be missing the Tin oxide, Zircopax, etc?
Donna
On Sun, 9 Oct 2005 14:03:27 -0500, Ron Roy wrote:
>Thanks Charles - but it's not my glaze - Just a rework of John Post's glaze
>with a different frit.
>
>RR
>
..... sorry snipped
>>The recipe is below:
>>
>>Fat White ^6 Ron Roy
>>
>>
>>
>>EPK 13.5
>>Frit 3134 5
>>Custer 35
>>Dolomite 19.5
>>Talc 1
>>Silica 26
Alisa Clausen on sun 22 apr 07
>I know this is an old message but.... out of curiousity - why would it by
>white? Would the recipe be missing the Tin oxide, Zircopax, etc?
>
>Donna
>
>>>
>>>EPK 13.5
>>>Frit 3134 5
>>>Custer 35
>>>Dolomite 19.5
>>>Talc 1
>>>Silica 26
>
Hi Donna
Although I understand why you ask, as the opacifying oxides often included
in white glazes such as Tin Oxide, Zironia or Titinia, certainly whiten a
glaze, white glazes can be achieved without them. They are not stark
whites or hard whites, but white to cream. These typically are glazes
made with Dolomite which includes Magnesia, an opacifier up to 1170c
(Hamer and Hamer) and in my experience, produces a milky to white, often
mat, base.
Best regards from Alisa in Denmark
We have a new little princess!
Lee Love on mon 23 apr 07
On 4/23/07, Alisa Clausen wrote:
> >I know this is an old message but.... out of curiousity - why would it by
> >white? Would the recipe be missing the Tin oxide, Zircopax, etc?
> >
> >Donna
> >
> >>>
> >>>EPK 13.5
> >>>Frit 3134 5
> >>>Custer 35
> >>>Dolomite 19.5
> >>>Talc 1
> >>>Silica 26
> >
>
>
> Hi Donna
> Although I understand why you ask, as the opacifying oxides often included
> in white glazes such as Tin Oxide, Zironia or Titinia, certainly whiten a
> glaze, white glazes can be achieved without them. They are not stark
> whites or hard whites, but white to cream. These typically are glazes
> made with Dolomite which includes Magnesia, an opacifier up to 1170c
> (Hamer and Hamer) and in my experience, produces a milky to white, often
> mat, base.
Nuka is a saturated silica white.
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://potters.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Ivor and Olive Lewis on mon 23 apr 07
Dear Donna Kat,=20
I suspect the glaze does not need to have an opacifier added.
Lime Magnesia glazes, (this one contains Dolomite, a double carbonate of =
MgO and CaO and some talc (MgO)), are renowned for giving micro =
crystalline effects when your cooling rate is slow. Opacity can be good =
enough to obscure a dark clay body and give a "Mutton Fat" finish.=20
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Donna Kat on mon 23 apr 07
On Mon, 23 Apr 2007 16:07:21 +0900, Lee Love wrote:
>
>Nuka is a saturated silica white.
>
>--
>Lee in Mashiko, Japan
as such would it be be an unstable glaze?
Thank you all for the responses. The hardest thing is to know what you
don't know.... I discover something almost every day when I'm lucky.
Donna
Taylor Hendrix on tue 24 apr 07
I did just find a Lee recipe for a nuka sage (did I spell that right?)
with copper. Never ran it though a program to see the Segar. It is
fired a bit hotter than ^6 so not important for this thread. Sorry
for jumping the gun.
T in R,TX
On 4/24/07, Taylor Hendrix wrote:
> Donna,
>
> A "stable" glaze in the Roy/Hesselberth model would be a glaze that
> retains its colorants within the fired glaze and resists leaching
> those colorants. They are stable. I don't think nuka has any added
> colorants, but I might be wrong.
Taylor Hendrix on tue 24 apr 07
I did just fine a Lee recipe for a nuka sage (did I spell that right?)
with copper. Never ran it though a program to see the Segar. It is
fired a bit hotter than ^6 so not important for this thread. Sorry
for jumping the gun.
T in R,TX
On 4/24/07, Taylor Hendrix wrote:
> Donna,
>
> A "stable" glaze in the Roy/Hesselberth model would be a glaze that
> retains its colorants within the fired glaze and resists leaching
> those colorants. They are stable. I don't think nuka has any added
> colorants, but I might be wrong.
Taylor Hendrix on tue 24 apr 07
Donna,
A "stable" glaze in the Roy/Hesselberth model would be a glaze that
retains its colorants within the fired glaze and resists leaching
those colorants. They are stable. I don't think nuka has any added
colorants, but I might be wrong.
Tay Tay, in Rock Rock, TX
John Hesselberth on wed 25 apr 07
On Apr 24, 2007, at 10:45 AM, Taylor Hendrix wrote:
> A "stable" glaze in the Roy/Hesselberth model would be a glaze that
> retains its colorants within the fired glaze and resists leaching
> those colorants. They are stable. I don't think nuka has any added
> colorants, but I might be wrong.
Hi Taylor,
Well, kinda. The glaze also needs to retain its integrity to be
stable whether or not is has colorants in it. Some no-colorant glazes
are so bad they stain with coffee or tea after use. Or the surface
erodes and becomes more matte. I don't consider that very stable
either. I haven't looked at the current glazes under discussion so
have no opinion on them specifically.
Regards,
John
Ron Roy on wed 25 apr 07
It's probably white because it's not properly melted - just not enough
boron and oversupplied with MgO.
Certainly not a clear glaze.
RR
>>I know this is an old message but.... out of curiousity - why would it by
>>white? Would the recipe be missing the Tin oxide, Zircopax, etc?
>>
>>Donna
>>
> >>>
>>>>EPK 13.5
>>>>Frit 3134 5
>>>>Custer 35
>>>>Dolomite 19.5
>>>>Talc 1
>>>>Silica 26
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Lee Love on wed 25 apr 07
On 4/24/07, Taylor Hendrix wrote:
> I did just fine a Lee recipe for a nuka sage (did I spell that right?)
> with copper. Never ran it though a program to see the Segar. It is
> fired a bit hotter than ^6 so not important for this thread. Sorry
> for jumping the gun.
Nuka and Nuka Seiji are two different glazes. Seiji is Japanese for
celadon. It was the poor farmer/potters way of imitating the Chinese
celadons they couldn't afford. If you see any green in Hamada's
glaze trailed decoration, it is probably Nuka Seiji.
Nuka is white. Here, it is called Nuka Jiro. The
recommended cone for traditional Mashiko Nami clay is cone 8. Like
the cone 8 glazes in Leach's book. Seiji is traditionally used for
decoration, usually on the outside of a pot along with a black glaze
and Kaki.
My seiji recipe is just the Nuka white with copper added.
It is from Phil Roger's synthetic nuka from his ash glaze book.
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://potters.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
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