A calcium borosilicate frit (fused, powdered glass) with oxide proportions suitable for use as a functional ceramic glaze with only minor additions. For a cone 04 glaze, add 10-15% EPK; for a cone 6 clear glaze, add 15% EPK and 10% silica.
First fusion: 1600ºF / 871ºC. Flow/Flux: 1750ºF / 954ºC. cte: 7.94 x 10-6