Fusion Frit F-12 - Various Sizes

On paper, Fusion F-12 has a very similar chemistry to 3134.

Frits are used in ceramic glazes for a wide range of reasons. They are man-made glass powder of controlled chemistry with many advantages over raw materials. Ceramic Frits are important components of most ceramic glazes and predominantly consist of silica, diboron trioxide, and soda. Due to their various applications, there are numerous types of Frits, each with specific uses.