Carol Tripp on wed 10 dec 03
Hi Ababi,
I noticed the math and then promptly forgot to comment. As for getting
brown with this one: that happens when the glaze is too thin. I have
several variations of this glaze and they all have a brown habit when they
are too thin.
Best regards,
Carol
Dubai, UAE
Ababi wrote:
>There is one good thing about reading the letters I sent last night....
>OPAL BLUE 5TO6 FROM CINDY STRNAD
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
>Cone 6 1222 deg.C. -
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
>Ferro 3134 50.00
>silica 25.00
>EPK Kaolin 25.00
>Cobalt Oxide 2.00
>Rutile 4.00
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
> Seger Weight%
>KNO 0.317 5.15%
>CaO 0.683 10.04%
>Al2O3 0.354 9.44%
>B2O3 0.634 11.56%
>SiO2 3.798 59.81%
>TiO2 0.191 4.00%
>Na2O 0.317 5.15%
>Al:Si 10.74
>Expan. 7.34
>ST 322.90
>Comment: Now the alumina is normal. Normal high.
>What I did not write about was the rutile +- cobalt +(iron) combination
>that sometimes causes ugly brown instead of blue
>
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Ababi on wed 10 dec 03
There is one good thing about reading the letters I sent last night....
OPAL BLUE 5TO6 FROM CINDY STRNAD
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Ferro 3134 50.00
silica 25.00
EPK Kaolin 25.00
Cobalt Oxide 2.00
Rutile 4.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.317 5.15%
CaO 0.683 10.04%
Al2O3 0.354 9.44%
B2O3 0.634 11.56%
SiO2 3.798 59.81%
TiO2 0.191 4.00%
Na2O 0.317 5.15%
Al:Si 10.74
Expan. 7.34
ST 322.90
Comment: Now the alumina is normal. Normal high.
What I did not write about was the rutile +- cobalt +(iron) combination
that sometimes causes ugly brown instead of blue
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ababi
Sent: Tuesday, December 09, 2003 8:48 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Blue glazes
HI
I say it as a result of
A) Letters sent by clayarters about 6-8 months ago.
B) My experience with similar glazes:
I write two or three here and than will go on. After all now when my
kiln is out of use I can apply "glaze" only into the computer.
I will analyze Chappell's
I will use the newest analysis from digitalfire.com
I want you to see the glazes this way: If you understand what the
numbers are fine. If not, compare the numbers.
FLOATING BLUE.CHAPPELL
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Nepheline Syenite 47.30
Gerstley Borate 27.00
silica 20.30
EPK Kaolin 5.40
Red Iron Oxide 2.00
Cobalt Oxide 1.00
Rutile 4.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.439 8.39%
CaO 0.456 7.12%
MgO 0.105 1.18%
Al2O3 0.502 14.23%
B2O3 0.364 7.06%
SiO2 3.459 57.84%
TiO2 0.188 4.18%
K2O 0.092 2.42%
Na2O 0.346 5.98%
Al:Si 6.89
Expan. 8.16
ST 339.40
This glaze is "high" in any oxide possible: B2O3 CaO KNO Si2O and Al2O3
My teacher called them "hard glazes" How can you call such a beautiful
glaze hard. I call them high alumina!
I say that in slow firing this glaze might be, probably will be ugly
brown.
http://lsv.ceramics.org/scripts/wa.exe?A2=ind0012&L=CLAYART&P=R77273&m=9
4264
...From a dear friend.
OPAL BLUE 5TO6 FROM CINDY STRNAD
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Ferro 3134 27.00
silica 25.00
EPK Kaolin 25.00
Cobalt Oxide 2.00
Rutile 4.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.317 3.61%
CaO 0.683 7.04%
Al2O3 0.655 12.26%
B2O3 0.634 8.11%
SiO2 5.776 63.79%
TiO2 0.354 5.19%
Na2O 0.317 3.61%
Al:Si 8.82
Expan. 6.62
ST 341.45
Please compare the glazes.
Now because I have written it so many times before, pleas go to:
http://members4.clubphoto.com/ababi306910/912566/
Read about my "combination":
It tells you how I overcame the mud of a similar "hard" glaze by
applying it over a "soft glaze" no it is not a porno site!
http://members4.clubphoto.com/ababi306910/185990/
See the example of the speckle green.
Good night
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Carole Fox
Sent: Monday, December 08, 2003 7:06 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Blue glazes
Ababi-
I fire fairly slowly and fire down my floating blue with no problem. Why
do
you say this and do others share this opinion?
- Carole
Carole Fox
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