Missouri Straw Yellow
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Cone: 9 – 10
Color: mottled yellow
Surface: satin
Firing: reduction
Recipe: (Percent)
Cornwall Stone ……………52.00
EPK Kaolin………………… 20.50
Dolomite …………………….11.70
Magnesium Carbonate …. 6.30
Whiting ……………………… 6.30
Bone Ash ……………………. 3.20
Totals: 100 %
Also add:
Rutile ………………………… 5.00
Red Iron Oxide …………… 2.00
Comments:
Never make more than a 7,000 gram batch!!!
Estimated Thermal Expansion = 7.44×10-6 /deg. C
Unity Formula for OU Missouri Straw Yellow:
0.059 K2O 0.409 Al2O3 2.132 SiO2
0.091 Na2O 0.003 Fe2O3 0.003 TiO2
0.483 CaO 0.033 P2O5 5.2:1 Si:Al Ratio
0.367 MgO
0.001 Li2O
Percentage Analysis for OU Missouri Straw Yellow: (by weight)
56.10 % SiO2
18.27 % Al2O3
2.43 % K2O
2.47 % Na2O
11.87 % CaO
6.48 % MgO
0.01 % Li2O
0.21 % Fe2O3
2.05 % P2O5
0.11 % TiO2