Fusion Frit F644

Alternate Names: Fusion Frit F-644

Description: Very high sodium, boron free, low alumina, high expansion frit

Oxide	Analysis	Formula
Na2O	29.43%	1.00
Al2O3	5.94%	0.12
SiO2	64.63%	2.27
Oxide Weight		210.67
Formula Weight		210.67

Notes

Used in crystalline glazes. Very high thermal expansion.

This material is highlighted in the video: A Broken Glaze Meets Insight-Live and a Magic Material (link is provided on this page).
This frit has an incredibly high Na₂O content coupled with very low Al₂O₃, that makes it potentially very useful in fixing glazes lacking sufficient clay content to suspend and harden them (substituting this enables lowering the feldspar and introducing clay to supply the lost Al₂O₃, for example). Ferro Frit 3110, commonly used in crystal glazes for its high KNaO, only has half as much as this! And for many applications Frit 3110 has unwanted B₂O₃.

Related Information

Links

Materials	Frit Frits are made by melting mixes of raw materials, quenching the melt in water, grinding the pebbles into a powder. Frits have chemistries raw materials cannot.
Materials	Degussa Frit 90208
Materials	Ferro Frit 3110 High sodium, high thermal expansion low boron frit. A super-feldspar in clay bodies. Melts a very low temperatures.
Materials	Mondre and Manz Frit 1233
Typecodes	Frit A frit is the powdered form a man-made glass. Frits are premelted, then ground to a glass. They have tightly controlled chemistries, they are available for glazes of all types.
URLs	http://www.fusionceramics.com/ Fusion Ceramics Frit Website
Media	A Broken Glaze Meets Insight-Live and a Magic Material Use Insight-Live.com to do major surgery on a feldspar saturated cone 10R glaze recipe with multiple issues: blistering, pinholing, crazing, settling, dusting and possibly leaching!

By Tony Hansen
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