... vetrosa,high transparent boron frit,used in (crystal polishing tiles,belt line,enboss) ceramic frit for wall tilesItemExpansion coefficient(×10-7/°C ... frit,third firing vetrosa,high transparent boron frit,used in (crystal polishing tiles,belt line,enboss),suitable for 1050-1150°CTransparent ... .It has good whiteness and can bemade with fast firing. ceramic frit for wall tiles