Rutile Blue

Rutile Blue

Cone: 9 – 10
Color: mottled blue, tan, brown
Surface: glossy
Firing: reduction

Recipe:    (Percent)
Dolomite ………… 15.80
Whiting ………….. 11.10
Custer Feldspar … 30.00
EPK ………………… 16.80
Silica  ………………. 26.30
Totals:    100 %
Also add:
Rutile…………………. 8.00

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

Estimated Thermal Expansion = 7.03×10-6 /deg. C

Unity Formula for Rutile Blue:
0.099 K2O     0.339 Al2O3    2.748 SiO2
0.044 Na2O    0.003 Fe2O3    0.002 TiO2
0.610 CaO     0.001 P2O5     8.1:1 Si:Al Ratio
0.248 MgO

Percentage Analysis for Rutile Blue: (by weight)
64.31 %   SiO2
13.47 % Al2O3
3.63 %    K2O
1.06 %  Na2O
13.33 %    CaO
3.90 %    MgO
0.19 % Fe2O3
0.06 %   P2O5
0.06 %    TiO2