Jeff’s Long Beach Blue
 

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Cone: 9 – 10
Color: mottled light blue
Surface: matte
Firing: reduction
 
Recipe: (percent)
Whiting …………… 18.59
Custer Feldspar …. 60.61
EPK …………………. 16.18
Cobalt Carbonate … 0.81
Rutile ………………… 3.81
 
Totals: 100 %
 
Estimated Thermal Expansion = 9.03×10-6 /deg. C
 
Unity Formula for Jeff’s Long Beach Blue:
0.224 K2O 0.553 Al2O3 2.813 SiO2
0.101 Na2O 0.004 Fe2O3 0.160 TiO2
0.649 CaO 0.001 P2O5 0.001 ZrO2
0.002 MgO 0.000 Cr2O3 5.1:1 Si:Al Ratio
0.023 CoO 0.001 V2O5
 
Percentage Analysis for Jeff’s Long Beach Blue: (by weight)

55.42 % SiO2
18.49 % Al2O3
6.92 % K2O
2.05 % Na2O
11.94 % CaO
0.03 % MgO
0.60 % CoO
0.21 % Fe2O3
0.05 % P2O5
0.06 % V2O3
4.19 % TiO2
0.04 % ZrO2