Steven Hill Clear

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Cone: 9 – 10
Color: clear
Surface: clear
Firing: reduction

Recipe:    (Percent)
Custer Feldspar ……. 36.00
Whiting ………………. 20.00
EPK ……………………. 13.00
Silica ………………….. 24.00
Ferro Frit 3110 ……… 4.00
Bentonite ……………… 3.00
Totals:        100 %

Comments:
if you are out of the Frit 3110, you may substitute gerstley borate for it.

Possible Health Hazards:
Silica: free silica-wear a NIOSH approved dust mask when handling dry material

Estimated Thermal Expansion = 7.57×10-6 /deg. C

Unity Formula for Steven Hill Clear:
0.150 K2O     0.414 Al2O3    3.531 SiO2
0.102 Na2O    0.005 B2O3     0.002 TiO2
0.738 CaO     0.005 Fe2O3    8.5:1 Si:Al Ratio
0.009 MgO     0.001 P2O5
0.000 Li2O

Percentage Analysis for Steven Hill Clear: (by weight)
66.71 %   SiO2
13.27 % Al2O3
0.11 %  B2O3
4.44 %    K2O
1.99 %  Na2O
13.02 %    CaO
0.11 %    MgO
0.25 % Fe2O3
0.04 %   P2O5
0.05 %    TiO2