How Much Frit is Too Much

Scheduling for powder and frit.

 

Bullseye  pumpkin orange medium frit 00321.0002
Cedit: Bullsye Glass Company

“How much frit is too much for thickness calculation?”

There are differences between powder and frit effects on calculations for scheduling.

Powder needs to be about 2mm thick to provide strong colour, and will thin to 1mm or less during firing, so there is unlikely to be any significant effect for scheduling.

Fine frit sizes for Bullseye are between 0.2 and 1.2mm, so a single thickness layer will not affect the firing.  However, several layers thick over a portion of the area will make up to a 3mm layer and will need consideration in the scheduling.

Medium (Bullseye) frit is 1.2 to 2.7mm, So, a concentrated layer of medium and larger frits needs to be treated as an additional layer when they cover significant areas of the glass.

Scattered frits of any size with proportionate spaces between the frit will not need separate consideration in the scheduling.  Frits used to fill spaces between pieces of glass will have no effect on the scheduling either.