Potterycrafts Calcium Borate Frit

This frit can be used as a substitute for Gerstley Borate or Colemanite in special effect glazes recipes and also as a constituent in Matt earthenware glazes. It can also produce a raku glaze if mixed equal parts with P2962 High Alkali frit.

Technical Information:

• Expansion: 6.1x10-6/øC.
• Firing Range: 1050 - 1160øC
• SiO2: 17.9%
• B2O3: 50.3%
• MgO: 0.1%
• Al2O3: 4.9%
• K2O: 0.3%
• CaO: 26.5%