|Monthly Tech-Tip |
Alternate Names: F12 Fusion,Frit F12
As this cone 6 melt flow test demonstrates, the Fusion F-12 is giving very similar performance to the Ferro. The GR6-A recipe is just 80% Ravenscrag Slip and 20% frit (10% zircopax has also been added to opacify). The degree-of-melt on the glazed tiles in also very similar, however notice that some of the whiteness has been lost on the second F-12 tile (the first is frit 3134). We are attributing this to the better melting of F-12, that is amplifying the color of iron present in the Ravenscrag Slip. For the third tile we reduced the frit to 15%, that has whitened it somewhat. Likely an increase in the zircon and would whiten it more.
On paper, Fusion F-12 has a very similar chemistry to 3134. And in practice it also appears very similar, although a little more melt-fluid than the 3134.
G2926B is a popular recipe and there has been alarm recently because of the difficulty in getting the Ferro frit. This motivated us to get a supply of the Fusion equivalent, F-12. We have done much testing in glazes and with melt fluidity tests like this and so far it is looking good.
|Materials||Ferro Frit 3134|
|Materials||Solargil Frit FR8|
|Materials||Hommel Frit 14|
|Materials||General Frit GF-111|
|Materials||Pemco Frit P-54|
|Co-efficient of Linear Expansion||8.18|
|Frit Softening Point||1450F|