Levels of quality
In order to remedy exactly this ignorance, we will show here the differences of the ceramic materials and explain in the following the effects of these 6 factors (group / quality grade / malleable mass / glaze / firing / Mohs hardness) in relation to the use in professional gastronomy by means of some examples. The ten most important material types for the dining table and kitchen sector are shown in bold in the following table.
| Group | Quality level | F - mass | Glaze | Firing | Hardness |
| Course ceramics | Brick | Clays - Mud | - | MB 800 - 1.000 °C | 3-4 |
| Course ceramics | Clinker | Clays - Mud | Salt | MB 800 - 1.000 °C | 3-4 |
| Course ceramics | Architectural ceramics | Clays - Mud | - | MB 800 - 1.000 °C | 3-4 |
| Course ceramics | Clay | Clays - Mud | Mud | MB 800 - 1.000 °C | 3-4 |
| Course ceramics | Sanitary ceramics | Clay - Kaoline | Quartz - Lead | MB 1.100 - 1.300 °C | 5-6 |
| Fine ceramics | Earthenware | Clay - Kaoline | Mud - Lead | MB 800 - 1.000 °C | 3-4 |
| Fine ceramics | Majolica | Clay - Kaoline | Lead | BB 1.000 - 1.100 °C | 3-4 |
| Fine ceramics | Fayence | Clay - Kaoline | Pewter - Lead | BB 1.000 - 1.100 °C | 3-4 |
| Fine ceramics | Stoneware | Clay - Kaoline | Quartz | BB 1.100 - 1.300 °C | 3-4 |
| Fine ceramics | Stoneware | Stoneware - Clays | Salt glaze | BB 900 °C | 3-5 |
| Fine ceramics | Fine stoneware | Clay - Kaoline | Feldspar | BB 900 ° C | 4-5 |
| Fine ceramics | Viterous | Clay - Kaoline | Quartz - Lead | BB 1.250 - 1.300 °C | 4-5 |
| Fine ceramics | Magnesium | Magnesium - Kaoline | Quartz - Lead | MB 1.240 - 1.280 °C | 4-5 |
| Fine ceramics | New Bone China | Clay - Kaoline | Quartz - Lead | MB 1.240 - 1.280 °C | 4-5 |
| Porcelain | Feldspar porcelain | Kaoline | Feldspar | MB 1.320 - 1.380 °C | 5-6 |
| Porcelain | Hard porcelain | Kaoline | Feldspar | BB 800 - 1.000 °C | 5-6 |
| Porcelain | Bone China | Boron-Kaoline | Lead - Boron - Feldspar | BB 1.240 - 1.280 °C | 5-6 |
| Porcelain | Dental ceramics | Feldspar - Kaoline | - | MB 1.280 - 1.300 °C | 6-7 |
| Porcelain | Technical ceramics | Corundum - Kaoline | - | MB 1.200 - 1.350 °C | 6-7 |
| Porcelain | Alumina | Corundum - Kaoline | Feldspar | BB 800 - 1.000 °C | 5-6 |
| Porcelain | High Alumina | Corundum - Kaoline | Feldspar | BB 800 - 1.000 °C | 5-6 |