Ferro 3134 is a high soda-calcium, low potash borate frit with low silica content.

Composition:
10.3%       Na₂O       Soda
20.1%       CaO        Calcium
23.1%       B₂O₃       Borate
46.5%       SiO₂        Silica Oxide

Fusion Temperature: 1450^o F

What is frit? 
Frit is ceramic chemicals that have been melted together and cooled rapidly (shattered), then ground to a fine powder. The purpose is to render soluble materials insoluble for workability and stability in glaze and clay formulas. Frits are always used as a flux in a formula even though they also contain percentages of alumina and silica in combination with common flux materials.

8/23