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These are higher temperature frits. 10 gram balls were melted on to this tile.
| Materials | Fusion Frit F-69 A magnesia borosilicate frit having very low thermal expansion and melting point. Commonly used as a substitute for Ferro frit 3249. | 
| Materials | Fusion Frit F-524 A low fire base glaze, add 10% kaolin, adjust thermal expansion using other frits. | 
| Materials | Frit LA-300 | 
| Materials | Frit B325 | 
| Materials | Ferro Frit 3124 A commonly available calcium borosilicate frit. | 
| Materials | Ferro Frit 3249 A magnesia borosilicate frit. Very low thermal expansion and melting point. Invaluable in pottery to increase the MgO in glazes and thereby prevent crazing. | 
| Materials | Chrysanthos Frit FR002N | 
| Materials | Chrysanthos Frit FR006 | 
| Materials | Ferro Frit 3565 | 
| Materials | Fusion Frit F-49 | 
| Materials | Fusion Frit FZ-557 | 
| Materials | Fusion Frit FZ-556 | 
| Materials | Ferro Frit CC-257 | 
| Materials | Fusion Frit F-15 | 
| Materials | Fusion Frit F-38 High strontium low alumina borosilicate flux. | 
| Materials | Chrysanthos Frit FR001 | 
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