(Glass Making) The material of which glass is made, after having been calcined or partly fused in a furnace, but before vitrification. It is a composition of silex and alkali, occasionally with other ingredients.
2.
(Ceramics) The material for glaze of pottery.
Frit brick, a lump of calcined glass materials, brought to a pasty condition in a reverberatory furnace, preliminary to the perfect vitrification in the melting pot.
