Ababi on sat 21 dec 02
Only the good results:
EDWARDS REVISED ROSENROT ^6 OX
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Cone 6 1222 deg.C. -
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Nepheline Syenite 18.00
Calcium Carbonate 12.00
FRIT 3134 15.00
EPK Kaolin 12.00
SILICA 35.00
STRONTIUM CARBONATE 5.00
TALC Nital 3.00
Chrome Oxide 0.40
Tin Oxide 5.00
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Seger Weight%
KNO 0.210 4.60%
CaO 0.599 11.01%
MgO 0.077 1.02%
SrO 0.114 3.85%
Al2O3 0.287 9.59%
P2O5 0.001 0.03%
B2O3 0.167 3.81%
SiO2 3.354 66.04%
TiO2 0.002 0.05%
K2O 0.031 0.95%
Na2O 0.179 3.64%
Al:Si 11.68
Expan. 7.07
ST 353.33
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For my students I prefer your older recipe they need the "redness"
On the other hand the results might of been less good than expected because the
firing was too high ( I see the cones as a guideline for the NEXT firing.)
I shall try again your earlier version.
http://www.escribe.com/art/clay/m59462.html
From Don Goodrich list:
================================
CRANBERRY (^5-6 OX)
PurpleMauveStrongPink1
made by combining Kemp 9 and Kemp 17
10.5 gerstley borate
25 nepheline syenite
36.5 flint
18.5 whiting
9.5 epk
add:
7.5 tin oxide
0.325 green chrome oxide
John Post:
================================
(I post a lot about John Post)
I tested this glaze with a frit I want to finish, Soft Borax frit from Bath Potters Supplies.
JOHN POST PINK MAUV
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^6 ox
SOFTBORAX FRIT (BATH) 17.00
Feldspar Soda F7 6.60
EPK Kaolin 21.70
Calcium Carbonate 22.10
SILICA 32.60
Tin Oxide 7.49
Chrome Oxide 0.32
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Seger Weight%
KNO 0.188 3.91%
CaO 0.810 15.07%
MgO 0.002 0.02%
Al2O3 0.318 10.75%
P2O5 0.001 0.06%
B2O3 0.265 6.11%
SiO2 3.212 63.97%
TiO2 0.004 0.09%
K2O 0.005 0.16%
Na2O 0.183 3.76%
Al:Si 10.09
Expan. 7.03
ST 349.03
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I think I added 7 tin not 7.5 sorry!
The results were pretty good.
This glaze looks different when thick and thin: I think ( almost sure) where it thick does
not melt good therefore kind of pink, white, where it is thin melts good and has the full
color.
About the last and best from my point of view I shall write
longer in the next letter about my new Wollastonite base. Here only the recipe and the
results:
WOLLASTONITE BASE
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Cone 6 1222 deg.C. -
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ENGLISH KAOLIN CC31 20.00
Wollastonite 34.00
Feldspar Soda F7 32.00
FRIT A 2120 p 7.00
KAOLIN CC31 calcined 7.00
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Seger Weight%
KNO 0.247 6.26%
CaO 0.716 15.55%
MgO 0.037 0.58%
BaO 0.000 0.02%
Al2O3 0.437 17.24%
SiO2 2.592 60.34%
TiO2 0.000 0.01%
K2O 0.026 0.96%
Na2O 0.221 5.30%
Al:Si 5.93
Expan. 8.10
ST 378.25
I added 7 tin and .035 chrome
It is the first time that I got kind of Barium Matte purple without barium.
I tried to scan it with bad results: It is half way between violet and mauve.
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
and also
http://www.israel-ceramics.org/membersGallery/personalpage.asp?MID=507
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