Potclays Frit 2275

Alternate Names: 2275 Alkalifritte, Potclays High Alkali Frit

Description: Very high alkali frit

Oxide	Analysis	Formula
CaO	5.32%	0.17
K2O	17.35%	0.33
Na2O	17.46%	0.50
Al2O3	5.69%	0.10
B2O3	3.88%	0.10
SiO2	50.30%	1.49
Oxide Weight		178.37
Formula Weight		178.37

Notes

This is a high expansion frit. All frit manufacturers have high-expansion frits in their product line and the mechanisms of all of these are the same: High levels of Na₂O and/or K₂O.

In pottery, the most common use for these frits is to produce crazing (e.g. for Raku). In traditional ceramic production, this type of frit can be employed to raise glaze thermal expansion to solve a shivering problem. This one has an unusually high percentage of Na₂O+K₂O. The most common similar frit in North America is Ferro Frit 3110, it contains less alkali and more SiO₂ so a higher percentage might be needed in a recipe.

Related Information

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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	Podmore Frit P2250
Materials	Ferro Frit 3110 High sodium, high thermal expansion low boron frit. A super-feldspar in clay bodies. Melts a very low temperatures.
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.

Data

Frit Melting Range (C)	860-1060C

By Tony Hansen
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