Fired at 350F/hr to 1350F and held for 15 minutes. Some are still burning off carbon (which seems strange). The two FZ16s are starting to move. Frit 3134 is expanding. 3602 is also starting to melt.

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Fired at 350F/hr to 1300F and held for 15 minutes. Some are still burning off carbon (which seems strange). There are two early leaders: Ferro frit 3110 and Fusion frit F75 are starting to deform (they have almost the same chemistry). Amazingly, these two frits have low boron, they rely on high soda as the flux.

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Fired at 350F/hr to 1400F and held for 15 minutes. Frit 3134 is still expanding. 3602 is also starting to flow. A number of them are shrinking and densifying like a porcelain would.
| Materials |
Ferro Frit 3110
High sodium, high thermal expansion low boron frit. A super-feldspar in clay bodies. Melts at very low temperatures. Useful to make crackle glazes. |
| Materials |
Ferro Frit 3124
A commonly available calcium borosilicate frit. It is glaze-like, needing only a kaolin addition to create a low-temperature glossy glaze. |
| Materials |
Ferro Frit 3134
A frit with 23% B2O3. The most common of frits used in pottery in North America. Around the world, other companies make frits of equivalent chemistry. |
| Materials |
Ferro Frit 3195
A commonly available calcium borosilicate frit. It is glaze-like, needing only a kaolin addition to create a low-temperature semi-glossy glaze. |
| Materials |
Ferro Frit 3249
A magnesia borosilicate frit. Very low thermal expansion. Invaluable for increasing the MgO in glazes (to prevent crazing and create matteness). Low melting. |
| Materials |
Frit LA-300
|
| Materials |
Frit B325
|
| Materials |
Ferro Frit 3602
A lead bisilicate frit with 2.5% alumina oxide. |
| Materials |
Fusion Frit F-15
|
| Materials |
Fusion Frit F-38
High strontium low alumina borosilicate flux. |
| 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-75
High sodium, high thermal expansion low boron frit. An equivalent of Ferro Frit 3110. |
| Materials |
Fusion Frit FZ-16
The champion in our frit melt-off competitition. This frit showcases the amazing fluxing power of boron and zinc working together. It is 15.5% ZnO. |
| Materials |
Fusion Frit F-524
A low fire base glaze, add 10% kaolin, adjust thermal expansion using other frits. |
| Projects | Comparing the Melt Fluidity of 16 Frits |
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