William Brouillard on tue 23 sep 97
Some fake Mashiko glazes from the Clayart list and other sources.
Also you might try mixtures of feldspar and RIO. Start with 4% and work your way
just like the real thing. Some elmers glue or a small amout
of gum will hold it in suspension.
Spar---------93
RIO-----------4
Gum---------1-3%
kaki glaze
Herbert Sanders is:
Neph. Syn. 38.7
Colemanite 20.0
Zinc Oxide 8.10
Barium Carb. 9.85
Kaolin 25.8
Flint 33.0
Red Iron Ox. 2 to 6 percent
Reeves Mashiko Synthetic AK5 ^10
Reeve's synth Mashiko over a clear glaze and wax resist.
recalculated from an analysis of Mashiko stone.
OM4 11.5
China Clya Clac. 11.3
Kona F4 31.4
Bone Ash .5
Talc 5.2
Wollastonite 6.5
Silica 27.0
Spanish Iron Ox 6.4
TiO2 .5
MnO2 .2
------
100.5
Glaze Name: Mashiko Synthetic AK5
Cone: 10
Color:
Testing: Untested
Surface: ?
Firing Type: Ox. or Red.
Glaze Type:
Date: 7/19/95
Ingredients % Amounts
OM-4 Ball clay 12.31
Calcined kaolin 12.10
Kona F-4 Feldspar 33.62
Bone Ash 0.53
Talc 5.57
Wollastonite 6.96
Silica 28.91
Total: 100.00 %
Also add: (colorants, etc.)
Titanium Dioxide 0.53
Manganese Dioxide 0.21
Red Iron Oxide, Spanish 6.85
Estimated Thermal Expansion: 60.06 x10-7
Silica/Alumina ratio: 7.9:1
Unity Molecular Formula:
0.102 K2O 0.852 Al2O3 6.773 SiO2
0.199 Na2O 0.006 Fe2O3 0.023 TiO2
0.443 CaO 0.011 P2O5
0.256 MgO
Percentage Analysis:
73.28 % SiO2
15.65 % Al2O3
1.73 % K2O
2.22 % Na2O
4.47 % CaO
1.86 % MgO
0.17 % Fe2O3
0.28 % P2O5
0.33 % TiO2
Comments: comments: I use Reeve's synth Mashiko over
a clear glaze and wax resist. John recalculated from an analysis
of Mashiko stone. I got the the following two glazes from the
anadian Potter, John Reeve: I saw it looking over his
shoulder at his glaze notebook while he was looking for
another glaze. :^) I _did_ ask if I could copy it! ;^) source for
original recipe: John Reeve submitted by: Lee in PigsEye e-mail:
leelove@MILL2.MILLCOMM.COM
Possible Health Hazards:
Talc: wear a NIOSH approved dust mask when handling dry material
Silica: free silica-wear a NIOSH approved dust mask when handling dry material
Manganese Dioxide: TOXIC-avoid inhalation-wear
a NIOSH approved dust mask when handling dry material
Glaze Name: Kaki
Cone: 10
Color:
Testing: Untested
Surface: ?
Firing Type: Ox. or Red.
Glaze Type:
Date: 7/19/95
Ingredients % Amounts
Red Art clay calcined 61.95
Custe Feldspar 17.70
Silica 8.85
Kaolin 2.65
Dolomite 5.31
Bone Ash 3.54
Total: 100.00 %
Also add: (colorants, etc.)
Red Iron Oxide 2.65
Estimated Thermal Expansion: 82.23 x10-7
Silica/Alumina ratio: 7.4:1
Unity Molecular Formula:
0.261 K2O 0.806 Al2O3 5.928 SiO2
0.072 Na2O 0.161 Fe2O3 0.050 TiO2
0.378 CaO 0.067 P2O5
0.289 MgO
Percentage Analysis:
66.02 % SiO2
15.23 % Al2O3
4.56 % K2O
0.83 % Na2O
3.93 % CaO
2.16 % MgO
4.77 % Fe2O3
1.76 % P2O5
0.74 % TiO2
Comments:
comments: Here is another Kaki I use over clear and wax resist.
This is sometimes more metallic red than Reeve Mashiko,
but covers (stays opaque over) the clear better. submitted by:
Lee in PigsEye e-mail: leelove@MILL2.MILLCOMM.COM
source for original recipe: Jim Gritner
Possible Health Hazards: Silica: free silica-wear a NIOSH
approved dust mask when handling dry material
Kaki, Jim Gritner ^10
Here is another Kaki I use over clear and wax resist:
Calcined Red Art 70
Custer 20
Flint 10
Kaolin 3
Dolomite 6
Bone Ash 4
Red Iron Oxide 3
This is sometimes more metallic red than Reeve Mashiko, but covers (stays
opaque over) the clear better.
--
william brouillard
1011 literary road
cleveland,oh.44113
ch151@cleveland.freenet.edu
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