Frits are parts of a glaze recipe that have been melted and ground to be added into a new glaze recipe. Frit 3269 is a significant source of boric oxide and alumina oxide with almost no calcium oxide. The material is used in gloss tile glazes fro cones 06-01. The frit is balanced enough to use on its own, but has a high thermal expansion, making it useful as a crackle glaze.
Information gathered from Digitalfire Ceramic Materials Database and The Potter's Dictionary of Materials and Techniques by Frank Hamer.
