Wissmach frits are made from crushed, screened and cleaned 96
COE tested compatible sheet glass from Wissmach 96 glass.
Frits are packaged in clear wide mouth plastic 16 oz. bottles and 4 lb jugs.
Some of the frits are made from luminsence glass and may have irid coating on them.
If you are casting the frit above 1410, it will burn off leaving nothing but the color.