Maxine Peace Potter on thu 19 jan 12
I am asking this for a student of mine.
She wants to do outdoo=3D
Hi=3DA0=3D0A=3D0AI am asking this for a student of mine.=3D0AShe wants to d=
o outdoo=3D
r sculpture, someplace where it freezes=3DA0=3D0Ain the winter. =3DA0She wa=
nts to=3D
know if firing to Cone 10, will save=3D0Athe pieces from cracking and also=
i=3D
f =3DA0majolica glaze=3D0Awill work on pieces that have been fired to Cone =
10.=3D
=3D0A=3D0AI myself am curious is a low fire glaze will be successful=3D0Aon=
ware =3D
that has been bisqued that hot.=3D0A=3D0Aanyone have any experience with th=
is=3D
=3D0Amany thanks,=3D0AMaxine=3D0A
Steve Mills on thu 19 jan 12
Over here Bone China addicts bisque at stoneware temps and glaze at low E/w=
a=3D
re!
Steve M
Steve Mills
Bath
UK
Sent from my iPod
On 19 Jan 2012, at 18:04, Maxine Peace Potter =
w=3D
rote:
> I am asking this for a student of mine.
> She wants to do outdoo
> Hi=3D20
>=3D20
> I am asking this for a student of mine.
> She wants to do outdoor sculpture, someplace where it freezes=3D20
> in the winter. She wants to know if firing to Cone 10, will save
> the pieces from cracking and also if majolica glaze
> will work on pieces that have been fired to Cone 10.
>=3D20
> I myself am curious is a low fire glaze will be successful
> on ware that has been bisqued that hot.
>=3D20
> anyone have any experience with this
> many thanks,
> Maxine
>=3D20
John Britt on thu 19 jan 12
Check with Alex Irvine if you want:
http://alexirvineceramics.blogspot.com/
He did an outdoor installation at Odyssey in Asheville NC using River Sid=
=3D
e Grit clay=3D20
body, a cone 6 clay. He did a lot of testing!
You could then use a glaze that fit that body (some cone six glaze) and a=
=3D
dd 12=3D20
zircopax and paint on majolica colors and fire to cone 6.
Should work,
John Britt Pottery
logan johnson on thu 19 jan 12
When I was in school we tried doing some majolica on ^10 gl=3D
Hi Maxine,=3D0A=3D0AWhen I was in school we tried doing some majolica on ^1=
0 gl=3D
azes.=3DA0 We used Mayco Stroke & Coat glazes on ^10 class glazes.=3D0Athe =
^10 =3D
glazes=3DA0 came out with large bubbles &the teacher said it didn't work ou=
t =3D
because=3DA0 there wasn't enough heat for a long enough time to heal the bu=
bb=3D
les.=3DA0=3DA0 This was tried in several firings & the results were the sam=
e in=3D
all of them.=3DA0=3DA0=3DA0 You could always do a test piece to see if it =
works =3D
for you.=3DA0=3DA0=3DA0 First our pieces were glazed & fired to ^10 then th=
e majo=3D
lica glazes were applied & re fired to ^05.=3D0ANow you may want to try add=
in=3D
g the lower temp designs to the ^10 glaze before firing then fire to ^10 bu=
=3D
t I don't hold much hope for that since some colors fire out at that temp. =
=3D
(reds & oranges & maybe the yellows)=3DA0 Then you have the issue of the ba=
se=3D
glaze flowing & possibly wrecking the design.=3DA0=3DA0 We stopped trying =
to c=3D
ombine the two & moved on too other things because the teacher wanted to mo=
=3D
ve on to other planned projects and there wasn't enough interest on the stu=
=3D
dents part to continue.=3DA0 There might be a way to accomplish your goal b=
ut=3D
I don't know it. =3D0A=3D0ASorry I couldn't be more help,=3D0ALogan=3D0A=
=3D0A=3D0ALoga=3D
n Johnson =3D0AAudeo Studios=3D0A=3D0A3930 118th Pl.=3DA0 n.e.=3D0A=3D0AMar=
ysville, Wa.=3D
=3D0A98271=3D0A(360) 651- 1478=3D0A =3D0A=3DA0www.audeostudios.com=3D0A"Car=
pe Argillam!=3D
!"=3D0A=3D0A=3D0A________________________________=3D0A From: Maxine Peace P=
otter axinepeacepotter@YAHOO.COM>=3D0ATo: Clayart@LSV.CERAMICS.ORG =3D0ASent: Thu=
rsda=3D
y, January 19, 2012 10:04 AM=3D0ASubject: Firing to clay to Cone 10 bisque =
& =3D
then applying majolica????=3D0A =3D0AI am asking this for a student of mine=
.=3D0A=3D
She wants to do outdoo=3D0AHi=3DA0=3D0A=3D0AI am asking this for a student =
of mine.=3D
=3D0AShe wants to do outdoor sculpture, someplace where it freezes=3DA0=3D0=
Ain th=3D
e winter. =3DA0She wants to know if firing to Cone 10, will save=3D0Athe pi=
eces=3D
from cracking and also if =3DA0majolica glaze=3D0Awill work on pieces that=
hav=3D
e been fired to Cone 10.=3D0A=3D0AI myself am curious is a low fire glaze w=
ill =3D
be successful=3D0Aon ware that has been bisqued that hot.=3D0A=3D0Aanyone h=
ave an=3D
y experience with this=3D0Amany thanks,=3D0AMaxine
Fredrick Paget on thu 19 jan 12
>I am asking this for a student of mine.
>She wants to do outdoo=3D
>
>Hi=3DA0=3D0A=3D0AI am asking this for a student of mine.=3D0AShe wants to =
do outdoo=3D
>r sculpture, someplace where it freezes=3DA0=3D0Ain the winter. =3DA0She w=
ants to=3D
> know if firing to Cone 10, will save=3D0Athe pieces from cracking and al=
so i=3D
>f =3DA0majolica glaze=3D0Awill work on pieces that have been fired to Cone=
10.=3D
>=3D0A=3D0AI myself am curious is a low fire glaze will be successful=3D0Ao=
n ware =3D
>that has been bisqued that hot.=3D0A=3D0Aanyone have any experience with t=
his=3D
>=3D0Amany thanks,=3D0AMaxine=3D0A
I think it will probably work but that is just my off hand opinion.
Why not, since she is a student, ask her to test it. Devise a test -
maybe a small carved tile . I would sugest fire it , glaze it and
boil in water . Then freeze it in the freezer, then repeat a couple
of times if it holds up the first time.
An interesting experiment.
Fred Paget
--
Twin Dragon Studio
Mill Valley, CA, USA
Bonnie Staffel on fri 20 jan 12
I had to answer these posts regarding using Mason Stains majolica method =
=3D
to
Cone 10 firing. If you check my website, you will see the results of my
firings to Cone 9+ with Mason Stain decorations along with slip glazes =3D
and
other mineral colors. I accomplish this by adding an equal amount of =3D
Frit
3134 to the Mason Stain, along with some gum for stability in handling =3D
and a
little glycerin for brushability. My base white glaze also contains zinc =
=3D
and
have had no reaction on the Mason Stains that I use, mostly the Pansy
Purple, several blue colors, yellows, blackberry and other colors. No
bubbling, or other problems. The Mason Stain that your friend used may =3D
have
been applied too thickly. I have a shard with my dry white base and mix =3D
the
stains like watercolors. Then I test the color on this shard to make =3D
sure it
is the right depth of color.=3D20
I believe that my basic white glaze has been published in one of the =3D
Lark
Books under Lee Davis' pot. This glaze stays in place with no running, =3D
but
drips do seem to blend out somewhat. However, I do scrape away very
noticeable drips. This glaze also survived a Cone 13 wood firing at the
school with no flaws.=3D20
I have used this glaze for years having to change the Feldspars and =3D
adjust
the formula when a feldspar became obsolete. It started out with the
original Cornwall Stone giving me a beautiful buttery glaze. Then =3D
changed to
Kingman, later to Neph Sy. And now use Kona F4. The look and surface =3D
looked
different, but was still acceptable as to action and reaction to the
decorations and held up for ovenware. I made extensive tests and changes =
=3D
to
give me a very serviceable and beautiful white glaze. Even changed from =3D
the
original Tin for an opacifier to Zircopax. During these changes in the
feldspars, it was also necessary to change clay bodies from those I =3D
mixed
myself to the last 25 years to a commercial body made by Highwater =3D
Clays.
Regards,
Bonnie
http://webpages.charter.net/bstaffel/
http://vasefinder.com/bstaffelgallery1.html
DVD Throwing with Coils and Slabs
DVD Introduction to Wheel Work
Charter Member Potters Council
Steve Mills on fri 20 jan 12
Dear Logan=3D20
I would suggest that the problems you experienced were because you were re-=
f=3D
iring the already glazed work at a temperature where it was beginning to so=
f=3D
ten and gas again.=3D20
Almost all glazes go through a "Gassing" phase as they melt whether they ar=
e=3D
fired once, twice, or three or more times.=3D20
Stopping the firing at the "Mayco" temp. trapped the cone 10 glazes at this=
g=3D
assing point, hence the problem you had.=3D20
China painters fire to the point where the underlieing glaze softens but be=
f=3D
ore the gassing point.=3D20
Steve M
Steve Mills
Bath
UK
Sent from my iPod
On 19 Jan 2012, at 20:13, logan johnson wrote:
> When I was in school we tried doing some majolica on ^10 gl
> Hi Maxine,
>=3D20
> When I was in school we tried doing some majolica on ^10 glazes. We used=
M=3D
ayco Stroke & Coat glazes on ^10 class glazes.
> the ^10 glazes came out with large bubbles &the teacher said it didn't w=
o=3D
rk out because there wasn't enough heat for a long enough time to heal the=
b=3D
ubbles. This was tried in several firings & the results were the same in =
a=3D
ll of them. You could always do a test piece to see if it works for you.=
=3D
First our pieces were glazed & fired to ^10 then the majolica glazes wer=
e=3D
applied & re fired to ^05.
> Now you may want to try adding the lower temp designs to the ^10 glaze be=
f=3D
ore firing then fire to ^10 but I don't hold much hope for that since some =
c=3D
olors fire out at that temp. (reds & oranges & maybe the yellows) Then you=
h=3D
ave the issue of the base glaze flowing & possibly wrecking the design. W=
e=3D
stopped trying to combine the two & moved on too other things because the =
t=3D
eacher wanted to move on to other planned projects and there wasn't enough =
i=3D
nterest on the students part to continue. There might be a way to accompli=
s=3D
h your goal but I don't know it.=3D20
>=3D20
> Sorry I couldn't be more help,
> Logan
>=3D20
>=3D20
> Logan Johnson=3D20
> Audeo Studios
>=3D20
> 3930 118th Pl. n.e.
>=3D20
> Marysville, Wa.
> 98271
> (360) 651- 1478
>=3D20
> www.audeostudios.com
> "Carpe Argillam!!"
>=3D20
>=3D20
> ________________________________
> From: Maxine Peace Potter
> To: Clayart@LSV.CERAMICS.ORG=3D20
> Sent: Thursday, January 19, 2012 10:04 AM
> Subject: Firing to clay to Cone 10 bisque & then applying majolica????
>=3D20
> I am asking this for a student of mine.
> She wants to do outdoo
> Hi=3D20
>=3D20
> I am asking this for a student of mine.
> She wants to do outdoor sculpture, someplace where it freezes=3D20
> in the winter. She wants to know if firing to Cone 10, will save
> the pieces from cracking and also if majolica glaze
> will work on pieces that have been fired to Cone 10.
>=3D20
> I myself am curious is a low fire glaze will be successful
> on ware that has been bisqued that hot.
>=3D20
> anyone have any experience with this
> many thanks,
> Maxine
stephani stephenson on sat 21 jan 12
Maxine, I don't think one needs to go to cone ten for outdoor sculpture.=3D=
20
there are so many variables=3DA0 in your question and so many approaches.=
=3D20
Shel Neymark, in N. New Mexico developed a clay body=3DA0 and=3DA0 base gla=
ze, =3D
sold through New Mexico clay in Albuquerque, which is an architectural body=
=3D
that has been tested for freeze thaw and=3DA0 which is fired to cone 02..(=
I=3D
know the clay is sold there, I=3DA0 would have to double check on the base=
g=3D
laze.) It's been used on many exterior projects. A number of cone 3- cone 5=
=3D
clays would work too and cone 3-5=3DA0 base glazes have the look and feel=
=3DA0=3D
=3DA0 and even color of majolica, they just aren't as low fired. that way s=
he=3D
could bring her clay and glaze=3DA0 in sync a bit more.
If she has a clay she works with already, I'd have her do the simple freeze=
=3D
thaw tests like Frederick suggested. soak the piece , put it in the freeze=
=3D
r, freeze, remove, etc...
so much also depends on the design...and whether water will collect in it .=
=3D
.. anything she can do with regards to design..thiinking about=3DA0 that, w=
il=3D
l help enormously.=3D20
the only problem I have found with firing high and glazing low are
1. the decreased absorption of the clay, which affects glaze application.(t=
=3D
he glaze won't soak into the clau when applied) she's have to figure out ho=
=3D
w to deal with that change.
also=3DA0 occasionally , certain fine bodied=3DA0 high fired clays don't ha=
ndle=3D
refiring so well. once they are fired to a vitreous state they don't=3DA0 =
ha=3D
ndle the thermal=3DA0 shock=3DA0 and tend to crack.=3D20
that's all theoretical though, what is important is that she try to test=3D=
A0=3D
her clay with her glazes and possibly=3DA0 use tests that mimic the scale =
an=3D
d dynamics of the sculpture (lots of vertical rise? be sure to test how the=
=3D
glaze performs on very vertical test tile..... in addition to the freeze/t=
=3D
haw tests
even so I remember seeing=3DA0 Hamada platters with stoneware glazes...wher=
e =3D
he went back and fired them very low so he could apply some luscious red=3D=
A0=3D
very low fired enamel/glazes, so there are a number of ways she could appr=
=3D
oach it.=3D20
=3DA0the best way is just to try , and learn!
best wishes
stephani
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