... raw material .such asKNaO,Al2O3,ZrSiO,wollastonite and so on.Description: to make water-proof frit with raw material.such as:KNaO ... ,Al2O3O,ZrSiO,wollastonite and so on.Non-Porous Frit ... raw material .such asKNaO,Al2O3,ZrSiO,wollastonite and so on.Description: to make water-proof frit with raw material.such as:KNaO ...