fritting

These structures have been initially interpreted as possible fritting (or melting) floors for the primary production of melted glass.

But whether this "fritting" was done in antiquity as a deliberate step in the manufacture of raw glass remains questionable.

Fritting, and the preheating of crucibles may have occurred in the upper areas of the main furnace.

Fritting, pre-heating pots and annealing processes were undertaken in different sections of the furnace, elevated above the heat source.

Partial fritting of the slurry favors the first stages of vitrification, which in turn lowers the final firing temperature.