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System of Measurement
System of Measurement
Inch
Porosity
Porosity
0%
2%
7%
36%
48%
Fabrication
Fabrication
Fired
Semi-Fired
Sintered
Unfired
Clarity
Clarity
Opaque
Minimum Temperature
Minimum Temperature
-399° to -250° F
Not Rated
Tensile Strength
Tensile Strength
2,500 psi
6,000 psi
13,000 psi
31,000 psi
51,000 psi
Refractive Index
Refractive Index
1.78
2.1