Maid O'Mud on fri 17 may 02
I'm hoping someone with a glaze program can help me. I decided to try =
the glaze listed below as it sounded interesting. BUT I don't have Frit =
3124 on hand. I do have 3134 and 3195. I checked the frit analysis, =
and decided to try using 3134 for the test.=20
It came out looking absolutely perfect and beautiful. The question is: =
by subbing 3134 for 3124 have I ruined the stability/durability of this =
glaze? Have I accidently improved it?
Can someone out there help me with this?
Thank you in advance
BUTTER SATIN GLOSS (Carol Tripp, Clayart)
36 custer feldspar
20 Frit 3124
16 Talc
20 EPK
8 Wollastonite
3% Tin Oxide
5% rutile=20
Sam - Maid O'Mud Pottery
Melbourne, Ontario CANADA
"First, the clay told me what to do.
Then, I told the clay what to do.
Now, we co-operate."
sam 1994
http://www.ody.ca/~scuttell/
Ababi on sat 18 may 02
Hello Sam
This is my morning shower
Please pay attention: Me , I , whenever there is more than 30% clay I
use the over as calcined
BUTTER SATIN GLOSS 1
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
FRIT 3134 16.00
Custer feldspar 32.60
EPK Kaolin 32.90
Dolomite 14.30
Flint 1.30
Magnesium Carb Light 3.00
Tin Oxide 3.00
Rutile 5.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.241 8.03%
CaO 0.448 10.93%
MgO 0.311 5.46%
Al2O3 0.310 13.76%
B2O3 0.166 5.02%
SiO2 1.912 50.03%
TiO2 0.195 6.78%
K2O 0.109 4.46%
Na2O 0.132 3.57%
Al:Si 6.17
Expan. 8.44
ST 367.92
I wish I made it right and would not get evening shower from the glaze
gurus
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
---------- Original Message ----------
>I'm hoping someone with a glaze program can help me. I decided to try
>the glaze listed below as it sounded interesting. BUT I don't have
>Frit 3124 on hand. I do have 3134 and 3195. I checked the frit
>analysis, and decided to try using 3134 for the test.
>It came out looking absolutely perfect and beautiful. The question is:
> by subbing 3134 for 3124 have I ruined the stability/durability of
>this glaze? Have I accidently improved it?
>Can someone out there help me with this?
>Thank you in advance
>BUTTER SATIN GLOSS (Carol Tripp, Clayart)
>36 custer feldspar
>20 Frit 3124
>16 Talc
>20 EPK
>8 Wollastonite
>3% Tin Oxide
>5% rutile
>Sam - Maid O'Mud Pottery
>Melbourne, Ontario CANADA
>"First, the clay told me what to do.
>Then, I told the clay what to do.
>Now, we co-operate."
>sam 1994
>http://www.ody.ca/~scuttell/
>________________________________________________________________________
>______
>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.
Margaret Barlow on sat 18 may 02
Hi Sam,
You asked
by subbing 3134 for 3124 have I ruined the stability/durability of this
glaze? Have I accidently improved it?
here is how the two glazes look on INSIGHT
CUSTER FELDSPAR..... 36.00 36.00
FRIT 3124........... 20.00
TALC................ 16.00 16.00
EPK KAOLIN.......... 20.00 20.00
WOLLASTONITE........ 8.00 8.00
FRIT 3134........... 20.00
======== ========
100.00 100.00
CaO 0.40* 8.01%w 9.09%m 0.43* 9.26%w 10.44%m
MnO2 0.00 0.03%w 0.02%m 0.00 0.03%w 0.02%m
MgO 0.36* 5.15%w 8.15%m 0.33* 5.15%w 8.09%m
K2O 0.12* 4.01%w 2.71%m 0.11* 3.87%w 2.60%m
Na2O 0.12* 2.53%w 2.60%m 0.14* 3.37%w 3.44%m
Fe2O3 0.00 0.23%w 0.09%m 0.00 0.23%w 0.09%m
TIO2 0.00 0.06%w 0.05%m 0.00 0.06%w 0.05%m
B2O3 0.12 2.86%w 2.61%m 0.18 4.82%w 4.38%m
AL2O3 0.46 16.51%w 10.31%m 0.36 14.44%w 8.96%m
SiO2 2.85 60.59%w 64.34%m 2.52 58.75%w 61.94%m
P2O5 0.00 0.03%w 0.01%m 0.00 0.03%w 0.01%m
COST/KG 1.48 1.61
Si:Al 6.24 6.92
SiB:Al 6.49 7.41
EXPAN453.73 486.52
MDT: RSE01.TMT
As you can see there is a little difference in the fluxing oxides and a
little more boron, less alumina and silica. By decreasing the alumina and
silica it is probably less durable, but it is still within the realms of
what constitutes a good glaze. the increase in boron is good as it improved
the melt. However due to the changes, mostly the decrease in Alumina and
silica the expansion is increased and this glaze will be more prone to craze
than the original.
here is my reformulation of the glaze with the original recipe for
comparison. The new glaze is much closer, almost dead on the original
numbers and the expansion is almost the same and you can use the frit you
have on hand.
CUSTER FELDSPAR..... 36.00 36.50
FRIT 3124........... 20.00
TALC................ 16.00 16.00
EPK KAOLIN.......... 20.00 25.00
WOLLASTONITE........ 8.00 8.50
FRIT 3134........... 12.50
SILICA.............. 1.50
======== ========
100.00 100.00
CaO 0.40* 8.01%w 9.09%m 0.40* 7.98%w 9.07%m
MnO2 0.00 0.03%w 0.02%m 0.00 0.03%w 0.02%m
MgO 0.36* 5.15%w 8.15%m 0.36* 5.21%w 8.24%m
K2O 0.12* 4.01%w 2.71%m 0.12* 3.97%w 2.69%m
Na2O 0.12* 2.53%w 2.60%m 0.12* 2.60%w 2.68%m
Fe2O3 0.00 0.23%w 0.09%m 0.00 0.27%w 0.11%m
TIO2 0.00 0.06%w 0.05%m 0.00 0.08%w 0.06%m
B2O3 0.12 2.86%w 2.61%m 0.12 3.03%w 2.78%m
AL2O3 0.46 16.51%w 10.31%m 0.46 16.62%w 10.39%m
SiO2 2.85 60.59%w 64.34%m 2.82 60.18%w 63.95%m
P2O5 0.00 0.03%w 0.01%m 0.00 0.03%w 0.01%m
COST/KG 1.48 1.38
Si:Al 6.24 6.15
SiB:Al 6.49 6.42
EXPAN453.73 454.13
MDT: RSE01.TMT
Hope this helps, ...Margaret
John Hesselberth on sat 18 may 02
Hi Sam,
No, this glaze is probably still reasonably durable with 3134 subbed 1:1 for
3124. With the original you had a silica level of 2.85 and an alumina level
of 0.457. With the 3134 version you have silica of 2.52 and alumina of
0.365. You have increased the boron from 0.115 to 0.180. This combined
with the lower silica and alumina will result in significantly better
melting--this will be a different glaze--it may move or run more. Neither
one would hold copper real well but they certainly should be OK with tin
oxide and rutile. You have also shifted the balance of fluxes a little.
Probably the most important change you have made is to significantly
increase the calculated expansion coefficient. You may find this glaze
crazes on bodies where the original wouldn't.
John
on 5/17/02 7:57 PM, Maid O'Mud at scuttell@ODY.CA wrote:
> I'm hoping someone with a glaze program can help me. I decided to try the
> glaze listed below as it sounded interesting. BUT I don't have Frit 3124
on
> hand. I do have 3134 and 3195. I checked the frit analysis, and decided
to
> try using 3134 for the test.
>
> It came out looking absolutely perfect and beautiful. The question is:
by
> subbing 3134 for 3124 have I ruined the stability/durability of this
glaze?
> Have I accidently improved it?
>
> Can someone out there help me with this?
>
> Thank you in advance
>
> BUTTER SATIN GLOSS (Carol Tripp, Clayart)
>
> 36 custer feldspar
> 20 Frit 3124
> 16 Talc
> 20 EPK
> 8 Wollastonite
>
> 3% Tin Oxide
> 5% rutile
Web sites: http://www.masteringglazes.com and http://www.frogpondpottery.com
Email: john@frogpondpottery.com
"The life so short, the craft so long to learn." Chaucer's translation of
Hippocrates, 5th cent. B.C.
Ron Roy on sun 19 may 02
Hi Sam,
I concure with Margaret - her revision is dead on - and further illustrates
the advantage if F3134 over F3124. If both frits cost $2.00 per pound the
savings per 100 lb batch will be about $15.
RR
>here is my reformulation of the glaze with the original recipe for
>comparison. The new glaze is much closer, almost dead on the original
>numbers and the expansion is almost the same and you can use the frit you
>have on hand.
>
>CUSTER FELDSPAR..... 36.00 36.50
> FRIT 3124........... 20.00
> TALC................ 16.00 16.00
> EPK KAOLIN.......... 20.00 25.00
> WOLLASTONITE........ 8.00 8.50
> FRIT 3134........... 12.50
> SILICA.............. 1.50
> ======== ========
> 100.00 100.00
>
> CaO 0.40* 8.01%w 9.09%m 0.40* 7.98%w 9.07%m
> MnO2 0.00 0.03%w 0.02%m 0.00 0.03%w 0.02%m
> MgO 0.36* 5.15%w 8.15%m 0.36* 5.21%w 8.24%m
> K2O 0.12* 4.01%w 2.71%m 0.12* 3.97%w 2.69%m
> Na2O 0.12* 2.53%w 2.60%m 0.12* 2.60%w 2.68%m
> Fe2O3 0.00 0.23%w 0.09%m 0.00 0.27%w 0.11%m
> TIO2 0.00 0.06%w 0.05%m 0.00 0.08%w 0.06%m
> B2O3 0.12 2.86%w 2.61%m 0.12 3.03%w 2.78%m
> AL2O3 0.46 16.51%w 10.31%m 0.46 16.62%w 10.39%m
> SiO2 2.85 60.59%w 64.34%m 2.82 60.18%w 63.95%m
> P2O5 0.00 0.03%w 0.01%m 0.00 0.03%w 0.01%m
>
> COST/KG 1.48 1.38
> Si:Al 6.24 6.15
> SiB:Al 6.49 6.42
> EXPAN453.73 454.13
>
>MDT: RSE01.TMT
>
>Hope this helps, ...Margaret
Ron Roy
RR #4
15084 Little Lake Road
Brighton
Ontario
Canada - K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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