Potterycrafts Gound & Dried High Boro-Silcate Ferro Frit

This frit has a very high Boron content and is not recommended for use over underglaze colours but with the addition of approximately 5% China clay it makes a good low firing (1000°C) glaze.

Technical Information:

• Linear Thermal Expansion: 6.5x10-6/°C.
• Firing Range: 920 - 950°C
• SiO2: 47.4%
• B2O3: 23.0%
• Al2O3: 12.4%
• Na2O: 6.0%
• CaO: 11.2%