2023DIN EN ISO 6769:2023-02 Vitreous and porcelain enamels - Determination of surface scratch hardness according to the Mohs scale (ISO 6769:2022); German version EN ISO 6769:2022
2023DIN EN ISO 6769:2023 Vitreous and porcelain enamels - Determination of surface scratch hardness according to the Mohs scale (ISO 6769:2022)
1970DIN EN ISO 6769 E:2022-02 Determination of surface scratch hardness of enamels and glazes according to Mohs hardness scale (draft)