Ferro Frit 3195.  Manufactured by Ferro, who now call it Frit 3195-2. Like Frit 3124, this can be a complete cone 06-02 leadless pottery glaze with the addition of a little kaolin to suspend. Adding more kaolin and silica will produce glazes suitable for higher temperatures. And 85:15 frit:kaolin mix of this produces a transparent cone 04 base. This 85:15 blend is not mirror-glossy, having a slightly matte finish. Since Frit 3195 is middle-of-the-road thermal expansion the 85:15 mix will fit most bodies.  This frit works well at stoneware temperatures as a source of boron, all the other oxides it supplies are needed and none are excessive. If used in too high a percentage, this frit can push the boron too high for use in underglaze colors.