Ababi on thu 27 dec 01
I fire to ^6 in my kiln 1220C in electric kiln.
PURPLE MAUVE STRONG PINK:
MATTE 1201deg.C. Cone 6
------------------------------------------------------------------------
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Formula Weight% Recipe
------------------------------------------------------------------------
----------------------------
KNO 0.226 5.31% FRIT 3134 11.00
CaO 0.772 13.01% SILICA 12.00
MgO 0.003 0.03% Calcium Carbonate 18.00
Al2O3 0.558 17.09% EPK Kaolin 30.00
P2O5 0.002 0.07% Custer feldspar 29.00
B2O3 0.127 2.66% Tin Oxide 7.50
SiO2 2.952 53.29% Chrome Oxide 0.32
TiO2 0.005 0.12%
K2O 0.114 3.22%
Na2O 0.112 2.09%
Cr2O3 0.0073 0.33%
SnO2 0.1731 7.84%
Al:Si 5.286
Expan. 6.900
ST 376.868
The idea was to take a successful recipe and matte it in order to get a
"barium pink" without barium carbonate.
I got dry violet with mauve speckles.
I hope decreasing gradually the EPK might give the right results.
Another test with the same familiar glaze was using Fluorspar instead
of the CaO in the glaze
PURPLEMAUVESTRONGPINK
FLUORSPAR 1201deg.C. Cone 6
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Formula Weight% Recipe
------------------------------------------------------------------------
----------------------------
KNO 0.232 6.11% FRIT VO 6004p 12.00
CaO 0.767 14.14% SILICA 35.50
MgO 0.001 0.02% FLUORSPAR 17.50
Al2O3 0.320 10.70% EPK Kaolin 17.00
P2O5 0.001 0.04% Custer feldspar 18.00
B2O3 0.144 3.29% Tin Oxide 7.50
SiO2 3.324 65.64% Chrome Oxide 0.32
TiO2 0.003 0.07%
K2O 0.131 4.05%
Na2O 0.101 2.06%
Al:Si 10.396
Expan. 7.323
ST 353.115
--------------------------------------
The results are similar to the first glaze but kind of glossier.
here again using 3134 was not tested, the same analysis
PURPLE MAUVE STRONG PINK
FLUORSPAR 1201deg.C. Cone 6
------------------------------------------------------------------------
----------------------------
Formula Weight% Recipe
------------------------------------------------------------------------
----------------------------
KNO 0.225 5.16% FRIT 3134 12.60
CaO 0.773 14.24% SILICA 37.40
MgO 0.001 0.02% FLUORSPAR 14.20
Al2O3 0.326 10.90% EPK Kaolin 17.90
P2O5 0.001 0.05% Custer feldspar 14.60
B2O3 0.137 3.14% Cryolite 3.30
SiO2 3.366 66.42% Tin Oxide 7.50
TiO2 0.003 0.07% Chrome Oxide 0.32
K2O 0.054 1.68%
Na2O 0.171 3.48%
Al:Si 10.334
Expan. 7.257
ST 354.430
---------------------------------
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
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