Monica’s Seafoam
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Cone: 9 – 10
Color: greenish, mottled with light spots
Surface: gloss
Firing: oxidation or reduction
Recipe: (Percent)
Whiting ………………… 4.69
Custer Feldspar …….. 40.22
EPK ……………………… 2.93
Dolomite ………………. 21.44
Silica …………………….17.16
OM-4 Ball Clay………. 6.85
Zinc Oxide ……………. 1.72
Tin Oxide ………………. 2.57
Granular Ilmenite ……. 0.86
Copper Carbonate ……..1.56
Totals: 100 %
Possible Health Hazards:
Silica: free silica-wear a NIOSH approved dust mask when handling dry material
Estimated Thermal Expansion = 8.47×10-6 /deg. C
Unity Formula for Monica’s Seafoam:
0.115 K2O 0.254 Al2O3 2.189 SiO2
0.052 Na2O 0.018 Fe2O3 0.018 TiO2
0.448 CaO 0.000 P2O5 0.045 SnO2
0.292 MgO 8.6:1 Si:Al Ratio
0.056 ZnO
0.037 CuO
Percentage Analysis for Monica’s Seafoam: (by weight)
57.94 % SiO2
11.41 % Al2O3
4.77 % K2O
1.42 % Na2O
11.07 % CaO
5.19 % MgO
2.01 % ZnO
1.30 % CuO
1.27 % Fe2O3
0.63 % TiO2
2.99 % SnO2