Table construction space
| Egyptian 15th Cent. BC |
Roman 1st Cent. AD |
European 13th Cent. AD |
Syrian 14th Cent. AD |
Modern | |
|---|---|---|---|---|---|
| Silica, SiO2 | 65 | 68 | 53 | 70 | 73 |
| Soda, Na2O | 20 | 16 | 3 | 12 | 16 |
| Potash, K2O | 2 | 0.5 | 17 | 2 | 0.5 |
| Lime, CaO | 4 | 8 | 12 | 10 | 5 |
| Magnesia, MgO | 4 | 0.5 | 7 | 3 | 3 |
| Batch Materials | plant ash quartz |
natron sand |
wood ash sand/quartz |
plant ash sand/quartz |
synthetic components |