Stephanie Wright on thu 28 dec 06
I am a new subscriber to the list, and also a fairly new potter. But I
must tell you all that I have been reading the posts here for the past few
weeks, and everyone is VERY helpful and generous with their knowledge.
Thank you all! Also, I must give kudos to both John Britt and June Perry.
My husband bought me John's glaze book for Christmas, and I have already
read it three times! And I have tried mixing test batches of some of
June's glazes, with great results. Even my instructor was impressed with
them, and he has been working with clay for over 40 years!
Ok, so enough of my rambling. I do actually have a question. My pottery
class has use of a large gas kiln. We fire stoneware at cone 10 reduction.
I am not sure about the iron content of the clay. But when we bisque, the
clay turns a pale pink, and final firing yields a pale whitish-gray. Do
any of you know of a 10R glaze that is more of a true yellow, rather than
the mustard color my class usually ends up with? Any suggestions would be
greatly appreciated!
Stephanie
Victoria E. Hamilton on thu 28 dec 06
Stephanie -
A "true" yellow is sometimes a challenge in ^10R. Woo Yellow is pretty
close. I'll email it to you if you like - can't remember if it came from
Val Cushing's glaze book or not.
Let me know.
Vicki Hamilton
Millennia Antica Pottery
Seattle, WA
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Stephanie
Wright
Sent: Thursday, December 28, 2006 8:16 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: [CLAYART] You all are great! Question about 10R Yellows...
I am a new subscriber to the list, and also a fairly new potter. But I must
tell you all that I have been reading the posts here for the past few weeks,
and everyone is VERY helpful and generous with their knowledge.
Thank you all! Also, I must give kudos to both John Britt and June Perry.
My husband bought me John's glaze book for Christmas, and I have already
read it three times! And I have tried mixing test batches of some of June's
glazes, with great results. Even my instructor was impressed with them, and
he has been working with clay for over 40 years!
Ok, so enough of my rambling. I do actually have a question. My pottery
class has use of a large gas kiln. We fire stoneware at cone 10 reduction.
I am not sure about the iron content of the clay. But when we bisque, the
clay turns a pale pink, and final firing yields a pale whitish-gray. Do any
of you know of a 10R glaze that is more of a true yellow, rather than the
mustard color my class usually ends up with? Any suggestions would be
greatly appreciated!
Stephanie
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WJ Seidl on thu 28 dec 06
Stephanie:
June Perry has an awesome glaze. It's labeled as a yellow. It fires yellow
in reduction, sort of an oatmeal with specks in oxidation both at ^10. The
formula is in the archives. Go to:
http://lsv.ceramics.org/scripts/wa.exe?S2=clayart&O=D&L=CLAYART&q=yellow+gla
ze&s=&f=&a=&b=
More yellows there than you can test in one lifetime
Best,
Wayne Seidl
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Stephanie
Wright
Sent: Thursday, December 28, 2006 11:16 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: You all are great! Question about 10R Yellows...
I am a new subscriber to the list, and also a fairly new potter. But I
must tell you all that I have been reading the posts here for the past few
weeks, and everyone is VERY helpful and generous with their knowledge.
Thank you all! Also, I must give kudos to both John Britt and June Perry.
My husband bought me John's glaze book for Christmas, and I have already
read it three times! And I have tried mixing test batches of some of
June's glazes, with great results. Even my instructor was impressed with
them, and he has been working with clay for over 40 years!
Ok, so enough of my rambling. I do actually have a question. My pottery
class has use of a large gas kiln. We fire stoneware at cone 10 reduction.
I am not sure about the iron content of the clay. But when we bisque, the
clay turns a pale pink, and final firing yields a pale whitish-gray. Do
any of you know of a 10R glaze that is more of a true yellow, rather than
the mustard color my class usually ends up with? Any suggestions would be
greatly appreciated!
Stephanie
____________________________________________________________________________
__
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Stephanie Wright on thu 28 dec 06
Thanks, Vicki. I do have the recipe here for Woo Yellow. But I have never
seen it, so I was hesitant to test it out. Now I'm eager to try it.
June Perry had a great looking yellow-gold glaze sample photo on her
website. She said in her description that it also has some rutile blue
inclusions. I tried mixing that one, and was all excited, but I was a
dunce! Mistakenly left two ingredients out! What it gave me was just
essentially a cream-colored base. However, the base was excellent. I did
not catch the error until after I fired (of course). But the cream color
was beautifully smooth, and did wonderful things blending with my
teacher's Werkheiser (sp?) purple. Some of the glaze stayed purple, but
other patches poured over the cream became a wonderfully bright, clear,
cobalt blue.
Stephanie
Stephanie Wright on thu 28 dec 06
Wayne,
Thanks for the suggestion, and the direction. I can't wait until my
classroom is open again after New Year. So much testing to look forward
to! :-)
Stephanie
claystevslat on fri 29 dec 06
Stephanie --
Disclaimer -- I work at ^6, this may not apply at ^10.
My experience is that the difference between a 'true'
yellow and a mustard yellow is largely from the presence
of iron in the clay. A truly white stoneware or porcelain
will give me a more true yellow result; a stoneware with
more iron will give me a mustard yellow result. I found
this to be the case both with vanadium-based and titanium-
based yellow glazes.
The fact that your clay turns pink in the bisque indicates
a likelihood that it's fairly rich in iron -- that's
probably why you're getting a mustard color.
Final glaze results are a result of glaze materials, firing,
and clay. There are, however, ways to get a bright yellow
over a dark clay. I've exerimented just a bit with slips and
stains and have found that a small amount of Mason's
Praseodymium yellow stain in a very white stoneware slip
(B-Mix or equivalent) will give a good yellow over a buff
or tan stoneware under a clear glaze. (It also works to
brighten an otherwise mustardy combination of glaze and clay,
but that's a bit wasteful of materials.)
Best wishes -- Steve Slatin
--- In clayart@yahoogroups.com, Stephanie Wright
wrote:
>
> I am a new subscriber to the list, and also a fairly new potter.
But I
> must tell you all that I have been reading the posts here for the
past few
> weeks, and everyone is VERY helpful and generous with their
knowledge.
> Thank you all! Also, I must give kudos to both John Britt and June
Perry.
> My husband bought me John's glaze book for Christmas, and I have
already
> read it three times! And I have tried mixing test batches of some
of
> June's glazes, with great results. Even my instructor was
impressed with
> them, and he has been working with clay for over 40 years!
>
> Ok, so enough of my rambling. I do actually have a question. My
pottery
> class has use of a large gas kiln. We fire stoneware at cone 10
reduction.
> I am not sure about the iron content of the clay. But when we
bisque, the
> clay turns a pale pink, and final firing yields a pale whitish-
gray. Do
> any of you know of a 10R glaze that is more of a true yellow,
rather than
> the mustard color my class usually ends up with? Any suggestions
would be
> greatly appreciated!
>
> Stephanie
Eleanora Eden on fri 29 dec 06
Stephanie,
My experience with praesedium yellow stain at cone 10 was very good
in oxidation and it totally disappeared in reduction.
I was just talking about that very thing with somebody, a pot that had
the yellow gone and I'm telling somebody "that's where the yellow was"
as if that explained the white expanses....pretty funny.
Eleanora
--
Bellows Falls Vermont
www.eleanoraeden.com
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