1. BS ISO 6769. Vitreous and porcelain enamels. Determination of surface scratch hardness according to the Mohs scale. (20th January 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Tracked Changes. Vitreous and porcelain enamels. Determination of surface scratch hardness according to the Mohs scale. (10th February 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Vitreous and porcelain enamels. Determination of surface scratch hardness according to the Mohs scale. (8th December 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗