Ben Morrison on sat 19 may 12
One idea I've seen some people use is a light amber. This will obviously mu=
te other colors, so if you're doing a lot of decorative color painting etc,=
this might not be a viable option, but for the red clay color itself a lig=
ht amber works great. There are several recipes for light amber glazes at m=
id-range and high fire. If you look at the link below, this guy has a good =
low-fire clear glaze. In his gallery he also has an amber, but his amber is=
dark amber. I've seen very light ambers that have just a glint of warm ton=
e that makes the clay pop.
http://www.ronphilbeckpottery.com/technical/
The link below is to a thread about Charlie Cummings work in Cone 1. The re=
cipes here aren't probably quite as easy to work with as a factory glaze, b=
ut I've tried them and they're not bad as long as they are very thin.
http://www.potters.org/subject93597.htm
Best of luck,
-Ben
________________________________
From: Denise Breitburg
To: Clayart@LSV.CERAMICS.ORG
Sent: Saturday, May 19, 2012 5:07 PM
Subject: looking for clear low fire glaze for terra cotta
Up until the last couple of years, I was using commercial 06 clear 'food-sa=
fe'
leaded glazes over duncan covercoats and raw terra cotta clay (standard 103
low fire lead). I've tried all of the commercial unleaded glazes by Duncan,
Mayco and Amaco, and can't get a true clear that lets the color of the clay
and underglazes show through without getting milky or blue-ish. I'm totally
frustrated. Any suggestions for a really good clear glaze in the 04-06 rang=
e?
the commercial glazes seem to be ok on white clay but not red - especially
not the 103 I use. I understand the health issues and why the lead was
withdrawn, but really want to start doing these pots again.
Any suggestions?
Denise Breitburg on sat 19 may 12
Up until the last couple of years, I was using commercial 06 clear 'food-=
=3D
safe'=3D20
leaded glazes over duncan covercoats and raw terra cotta clay (standard 1=
=3D
03=3D20
low fire lead). I've tried all of the commercial unleaded glazes by Dunca=
=3D
n,=3D20
Mayco and Amaco, and can't get a true clear that lets the color of the cl=
=3D
ay=3D20
and underglazes show through without getting milky or blue-ish. I'm total=
=3D
ly=3D20
frustrated. Any suggestions for a really good clear glaze in the 04-06 ra=
=3D
nge?=3D20
the commercial glazes seem to be ok on white clay but not red - especiall=
=3D
y=3D20
not the 103 I use. I understand the health issues and why the lead was=3D20=
=3D
withdrawn, but really want to start doing these pots again.
Any suggestions?
James Freeman on sun 20 may 12
On Sat, May 19, 2012 at 8:07 PM, Denise Breitburg wrote=
:
Any suggestions for a really good clear glaze in the 04-06 range?
Denise...
Here is one I have used. It is from one of Jeff Zamek's books (all
excellent), and it has been trouble-free. It takes colorants extremely
well, and also responds well to opacification with Zircopax:
Glaze name: Zam #2 Clear Gloss
Cone: 04
Color: Clear
Testing: Tested
Surface: shiny or glossy
Firing: oxidation or reduction
GlazeType:
Recipe: Percent
Frit 3195 63.00
Wollastonite 21.00
Silica 8.00
EPK 8.00
Totals: 100 %
Comments:
Possible Health Hazards:
Silica: free silica-wear a NIOSH approved dust mask when handling dry
material
Estimated Thermal Expansion =3D 7.12x10-6 /deg. C
Unity Formula for 04:
0.001 K2O 0.302 Al2O3 2.394 SiO2
0.163 Na2O 0.571 B2O3 0.001 TiO2
0.814 CaO 0.002 Fe2O3 0.000 MnO2
0.022 MgO 0.000 P2O5 7.9:1 Si:Al Ratio
Percentage Analysis for Zam #2 Clear Gloss:
52.99 % SiO2
11.35 % Al2O3
14.61 % B2O3
0.03 % K2O
3.72 % Na2O
16.82 % CaO
0.33 % MgO
0.12 % Fe2O3
0.03 % TiO2
Good luck with your project.
...James
James Freeman
"Talk sense to a fool, and he calls you foolish."
-Euripides
http://www.jamesfreemanstudio.com
http://www.flickr.com/photos/jamesfreemanstudio/
http://www.jamesfreemanstudio.com/resources
Breitburg, Denise on sun 20 may 12
____Thanks Ben. I'm happy to mix my own glazes but unfortunately amber won'=
=3D
t work. I'm looking for something that will let the true colors of the unde=
=3D
rglazes show through=3D20
Cheers
Denise
____________________________________
From: Ben Morrison [potterpdx@yahoo.com]
Sent: Sunday, May 20, 2012 2:01 AM
To: Breitburg, Denise; Clayart@LSV.CERAMICS.ORG
Subject: Re: looking for clear low fire glaze for terra cotta
One idea I've seen some people use is a light amber. This will obviously mu=
=3D
te other colors, so if you're doing a lot of decorative color painting etc,=
=3D
this might not be a viable option, but for the red clay color itself a lig=
=3D
ht amber works great. There are several recipes for light amber glazes at m=
=3D
id-range and high fire. If you look at the link below, this guy has a good =
=3D
low-fire clear glaze. In his gallery he also has an amber, but his amber is=
=3D
dark amber. I've seen very light ambers that have just a glint of warm ton=
=3D
e that makes the clay pop.
http://www.ronphilbeckpottery.com/technical/
The link below is to a thread about Charlie Cummings work in Cone 1. The re=
=3D
cipes here aren't probably quite as easy to work with as a factory glaze, b=
=3D
ut I've tried them and they're not bad as long as they are very thin.
http://www.potters.org/subject93597.htm
Best of luck,
-Ben
________________________________
From: Denise Breitburg
To: Clayart@LSV.CERAMICS.ORG
Sent: Saturday, May 19, 2012 5:07 PM
Subject: looking for clear low fire glaze for terra cotta
Up until the last couple of years, I was using commercial 06 clear 'food-sa=
=3D
fe'
leaded glazes over duncan covercoats and raw terra cotta clay (standard 103
low fire lead). I've tried all of the commercial unleaded glazes by Duncan,
Mayco and Amaco, and can't get a true clear that lets the color of the clay
and underglazes show through without getting milky or blue-ish. I'm totally
frustrated. Any suggestions for a really good clear glaze in the 04-06 rang=
=3D
e?
the commercial glazes seem to be ok on white clay but not red - especially
not the 103 I use. I understand the health issues and why the lead was
withdrawn, but really want to start doing these pots again.
Any suggestions?
MUDITIS on sun 20 may 12
-----Original Message-----
From: Denise Breitburg
Sent: Saturday, May 19, 2012 8:07 PM
To: Clayart@LSV.CERAMICS.ORG
Subject: looking for clear low fire glaze for terra cotta
Up until the last couple of years, I was using commercial 06 clear
'food-safe'
leaded glazes over duncan covercoats and raw terra cotta clay (standard 103
low fire lead). I've tried all of the commercial unleaded glazes by Duncan,
Mayco and Amaco, and can't get a true clear that lets the color of the clay
and underglazes show through without getting milky or blue-ish. I'm totally
frustrated. Any suggestions for a really good clear glaze in the 04-06
range?
Hello Denise-
I started out with low fire clay and glazes and I used Duncan's Pure
Brilliance. Have you tried this one yet?
I bought a gallon of the dipping glazes so I wouldn't have to brush them on=
.
The one thing I did have problems
with, was as I dipped my first piece in, I noticed that I was getting pin
holes on the surface of my pots as the glaze
dried. I called the supplier and they told me to come get a viscosity cup s=
o
I could get the glaze the correct thickness
to stop the pinholes. After I got the viscosity cup and added water to the
glaze, it did fine. In fact, it looked so good
after glaze firing the pieces, I have never used anything else.
Here is a YouTube Video on how to do the Viscosity testing, in case you try
it. (If you haven't already)
http://www.youtube.com/watch?v=3Dwr0MCJjqS_E
Here is another website address for ordering the Glaze, or just reading som=
e
more information on it.
http://www.duncanpaintstore.com/nmclay-bin/shop.pl/page=3DClears.htm/SID=3D=
PUT_SID_HERE
Hope this helps :)
Sonja Noskowiak
Muditis Pottery
Breitburg, Denise on tue 12 jun 12
I haven't tested everything, but of the recipes I've tried, Rick Monikowski=
=3D
's=3D20
Ferro Frit 3195 --- 88%
E.P.K. --- 10%
Bentonite --- 2%
was by far the clearest. (Thank you Rick!) Some of the others were a nice c=
=3D
lear on white clay, but didn't work as well on the terra cotta I use.
I'm still having a bit of trouble with tiny bubbles in the glaze though. I=
=3D
do a slow 04 firing with a 10 min soak and a slow cool down for the first =
=3D
200 degrees after reaching temperature. Any suggestions? I was thinking it =
=3D
may need to be either thinner, fired with no soak, or maybe using this firi=
=3D
ng schedule I need to set the kiln for 05 (with the soak it would then prob=
=3D
ably wind up as an 04 firing.
I'd be grateful for any ideas - I don't know if there's a standard 'cure' f=
=3D
or this or if it's glaze specific
Densie
________________________________________
From: Denise Breitburg [breitburgd@SI.EDU]
Sent: Saturday, May 19, 2012 8:07 PM
To: Clayart@LSV.CERAMICS.ORG
Cc: Breitburg, Denise
Subject: looking for clear low fire glaze for terra cotta
Up until the last couple of years, I was using commercial 06 clear 'food-sa=
=3D
fe'
leaded glazes over duncan covercoats and raw terra cotta clay (standard 103
low fire lead). I've tried all of the commercial unleaded glazes by Duncan,
Mayco and Amaco, and can't get a true clear that lets the color of the clay
and underglazes show through without getting milky or blue-ish. I'm totally
frustrated. Any suggestions for a really good clear glaze in the 04-06 rang=
=3D
e?
the commercial glazes seem to be ok on white clay but not red - especially
not the 103 I use. I understand the health issues and why the lead was
withdrawn, but really want to start doing these pots again.
Any suggestions?=3D
ronroy@CA.INTER.NET on wed 13 jun 12
Hi Denise,
I did some research on bubbles in glazes many years ago - one study
suggested high levels of alumina helped suppress them. I would suggest
doing a line blend increasing the EPK 1% at a time to see if that will
help.
There is already a lot of alumina in this glaze but a lot of it is in
the frit so it's already in solution - let me know if you need more - RR
Quoting "Breitburg, Denise" :
> I haven't tested everything, but of the recipes I've tried, Rick Monikows=
ki's
>
> Ferro Frit 3195 --- 88%
> E.P.K. --- 10%
> Bentonite --- 2%
>
> was by far the clearest. (Thank you Rick!) Some of the others were a
> nice clear on white clay, but didn't work as well on the terra cotta
> I use.
>
> I'm still having a bit of trouble with tiny bubbles in the glaze
> though. I do a slow 04 firing with a 10 min soak and a slow cool
> down for the first 200 degrees after reaching temperature. Any
> suggestions? I was thinking it may need to be either thinner, fired
> with no soak, or maybe using this firing schedule I need to set the
> kiln for 05 (with the soak it would then probably wind up as an 04
> firing.
>
> I'd be grateful for any ideas - I don't know if there's a standard
> 'cure' for this or if it's glaze specific
>
> Densie
>
> ________________________________________
> From: Denise Breitburg [breitburgd@SI.EDU]
> Sent: Saturday, May 19, 2012 8:07 PM
> To: Clayart@LSV.CERAMICS.ORG
> Cc: Breitburg, Denise
> Subject: looking for clear low fire glaze for terra cotta
>
> Up until the last couple of years, I was using commercial 06 clear
> 'food-safe'
> leaded glazes over duncan covercoats and raw terra cotta clay (standard 1=
03
> low fire lead). I've tried all of the commercial unleaded glazes by Dunca=
n,
> Mayco and Amaco, and can't get a true clear that lets the color of the cl=
ay
> and underglazes show through without getting milky or blue-ish. I'm total=
ly
> frustrated. Any suggestions for a really good clear glaze in the 04-06 ra=
nge?
> the commercial glazes seem to be ok on white clay but not red - especiall=
y
> not the 103 I use. I understand the health issues and why the lead was
> withdrawn, but really want to start doing these pots again.
>
> Any suggestions?
Frank Gaydos on wed 13 jun 12
We use this clear at school:=3D20
Frit 3195.........85=3D20
EPKaolin........10=3D20
Frit 3110 or silica....5=3D20
Frank Gaydos=3D20
"Men never do evil so completely and cheerfully as=3D20
when they do it from religious conviction"=3D20
Blaise Pascal.=3D20
http://home.comcast.net/~frankgaydos/index.html=3D20
----- Original Message -----
From: "Denise Breitburg" =3D20
To: Clayart@LSV.CERAMICS.ORG=3D20
Sent: Tuesday, June 12, 2012 7:16:17 PM=3D20
Subject: Re: looking for clear low fire glaze for terra cotta=3D20
I haven't tested everything, but of the recipes I've tried, Rick Monikowski=
=3D
's=3D20
Ferro Frit 3195 --- 88%=3D20
E.P.K. =3DC2=3DA0--- 10%=3D20
Bentonite --- 2%=3D20
was by far the clearest. (Thank you Rick!) Some of the others were a nice c=
=3D
lear on white clay, but didn't work as well on the terra cotta I use.=3D20
=3DC2=3DA0I'm still having a bit of trouble with tiny bubbles in the glaze =
thou=3D
gh. I do a slow 04 firing with a 10 min soak and a slow cool down for the f=
=3D
irst 200 degrees after reaching temperature. Any suggestions? I was thinkin=
=3D
g it may need to be either thinner, fired with no soak, or maybe using this=
=3D
firing schedule I need to set the kiln for 05 (with the soak it would then=
=3D
probably wind up as an 04 firing.=3D20
I'd be grateful for any ideas - I don't know if there's a standard 'cure' f=
=3D
or this or if it's glaze specific=3D20
Densie=3D20
________________________________________=3D20
From: Denise Breitburg [breitburgd@SI.EDU]=3D20
Sent: Saturday, May 19, 2012 8:07 PM=3D20
To: Clayart@LSV.CERAMICS.ORG=3D20
Cc: Breitburg, Denise=3D20
Subject: looking for clear low fire glaze for terra cotta=3D20
Up until the last couple of years, I was using commercial 06 clear 'food-sa=
=3D
fe'=3D20
leaded glazes over duncan covercoats and raw terra cotta clay (standard 103=
=3D
=3D20
low fire lead). I've tried all of the commercial unleaded glazes by Duncan,=
=3D
=3D20
Mayco and Amaco, and can't get a true clear that lets the color of the clay=
=3D
=3D20
and underglazes show through without getting milky or blue-ish. I'm totally=
=3D
=3D20
frustrated. Any suggestions for a really good clear glaze in the 04-06 rang=
=3D
e?=3D20
the commercial glazes seem to be ok on white clay but not red - especially=
=3D
=3D20
not the 103 I use. I understand the health issues and why the lead was=3D20
withdrawn, but really want to start doing these pots again.=3D20
Any suggestions?
tony clennell on wed 13 jun 12
Denise: Here a clear that I am using that works well.
Darcy's Clear
66 Frit 3195
14 Frit 3134
05 Silica
15 EPK
Best of luck. Life on the dark side ain't as easy as I thought. tc
On Tue, Jun 12, 2012 at 7:16 PM, Breitburg, Denise wrote=
:
> I haven't tested everything, but of the recipes I've tried, Rick
> Monikowski's
>
> Ferro Frit 3195 --- 88%
> E.P.K. --- 10%
> Bentonite --- 2%
>
> was by far the clearest. (Thank you Rick!) Some of the others were a nice
> clear on white clay, but didn't work as well on the terra cotta I use.
>
> I'm still having a bit of trouble with tiny bubbles in the glaze though.
> I do a slow 04 firing with a 10 min soak and a slow cool down for the fir=
st
> 200 degrees after reaching temperature. Any suggestions? I was thinking i=
t
> may need to be either thinner, fired with no soak, or maybe using this
> firing schedule I need to set the kiln for 05 (with the soak it would the=
n
> probably wind up as an 04 firing.
>
> I'd be grateful for any ideas - I don't know if there's a standard 'cure'
> for this or if it's glaze specific
>
> Densie
>
> ________________________________________
> From: Denise Breitburg [breitburgd@SI.EDU]
> Sent: Saturday, May 19, 2012 8:07 PM
> To: Clayart@LSV.CERAMICS.ORG
> Cc: Breitburg, Denise
> Subject: looking for clear low fire glaze for terra cotta
>
> Up until the last couple of years, I was using commercial 06 clear
> 'food-safe'
> leaded glazes over duncan covercoats and raw terra cotta clay (standard 1=
03
> low fire lead). I've tried all of the commercial unleaded glazes by Dunca=
n,
> Mayco and Amaco, and can't get a true clear that lets the color of the cl=
ay
> and underglazes show through without getting milky or blue-ish. I'm total=
ly
> frustrated. Any suggestions for a really good clear glaze in the 04-06
> range?
> the commercial glazes seem to be ok on white clay but not red - especiall=
y
> not the 103 I use. I understand the health issues and why the lead was
> withdrawn, but really want to start doing these pots again.
>
> Any suggestions?
--
http://smokieclennell.blogspot.com
Ben Morrison on thu 14 jun 12
If it still has bubbles at 04 it's sounds like it's not quite =3D
Denise,=3D0A=3D0AIf it still has bubbles at 04 it's sounds like it's not qu=
ite =3D
mature. The glaze gurus could probably give better advice than I could, but=
=3D
if it were me I'd probably try a line blend with 3110 or a borate of some =
=3D
kind to try and get the maturation temp down just slightly so that by 04 it=
=3D
's melted and healed over. I might even try mixing that glaze with 3124 or =
=3D
even 3134 just to test it out. Does it hard pan?=3D0A=3D0A-Ben=3D0A=3D0A=3D=
0A=3D0A_____=3D
___________________________=3D0A From: "Breitburg, Denise" DU=3D
>=3D0ATo: Clayart@LSV.CERAMICS.ORG =3D0ASent: Tuesday, June 12, 2012 4:16 P=
M=3D0A=3D
Subject: Re: looking for clear low fire glaze for terra cotta=3D0A =3D0AI h=
aven=3D
't tested everything, but of the recipes I've tried, Rick Monikowski's =3D0=
A=3D
=3D0AFerro Frit 3195 --- 88%=3D0AE.P.K.=3DA0 --- 10%=3D0ABentonite --- 2%=
=3D0A=3D0Awas =3D
by far the clearest. (Thank you Rick!) Some of the others were a nice clear=
=3D
on white clay, but didn't work as well on the terra cotta I use.=3D0A=3D0A=
I'm =3D
still having a bit of trouble with tiny bubbles in the glaze though. I do a=
=3D
slow 04 firing with a 10 min soak and a slow cool down for the first 200 d=
=3D
egrees after reaching temperature. Any suggestions? I was thinking it may n=
=3D
eed to be either thinner, fired with no soak, or maybe using this firing sc=
=3D
hedule I need to set the kiln for 05 (with the soak it would then probably =
=3D
wind up as an 04 firing.=3D0A=3D0AI'd be grateful for any ideas - I don't k=
now =3D
if there's a standard 'cure' for this or if it's glaze specific=3D0A=3D0ADe=
nsie=3D
=3D0A=3D0A________________________________________=3D0AFrom: Denise Breitbu=
rg [br=3D
eitburgd@SI.EDU]=3D0ASent: Saturday, May 19, 2012 8:07 PM=3D0ATo: Clayart@L=
SV.C=3D
ERAMICS.ORG=3D0ACc: Breitburg, Denise=3D0ASubject: looking for clear low fi=
re g=3D
laze for terra cotta=3D0A=3D0AUp until the last couple of years, I was usin=
g co=3D
mmercial 06 clear 'food-safe'=3D0Aleaded glazes over duncan covercoats and =
ra=3D
w terra cotta clay (standard 103=3D0Alow fire lead). I've tried all of the =
co=3D
mmercial unleaded glazes by Duncan,=3D0AMayco and Amaco, and can't get a tr=
ue=3D
clear that lets the color of the clay=3D0Aand underglazes show through wit=
ho=3D
ut getting milky or blue-ish. I'm totally=3D0Afrustrated. Any suggestions f=
or=3D
a really good clear glaze in the 04-06 range?=3D0Athe commercial glazes se=
em=3D
to be ok on white clay but not red - especially=3D0Anot the 103 I use. I u=
nd=3D
erstand the health issues and why the lead was=3D0Awithdrawn, but really wa=
nt=3D
to start doing these pots again.=3D0A=3D0AAny suggestions?
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