Ceramic Frits are vitreous compounds that have been melted, and then rapidly cooled.
The compounds are insoluble in water, and when added to glaze, the glaze will be insoluble.
Frits allow even some hazardous materials to become safer components in fired glazes.
Frits also allow glazes to be fired at low temperatures, and encourage a more consistent result.
Frits can be used as a primary or auxiliary flux.
Ferro Frit 3195 is leadless frit that is high in boron and calcium.
It is very fluid, and not recommended for use in underglaze colors.
It has a range of cone 06 to cone 02.