From: Modeling of Bohemian and Moravian glass recipes from Gothic to Baroque periods
Glass-forming material | Flux | Calcium source | Additives | ||
---|---|---|---|---|---|
Gothic | Quartz | Beech ash | Beech ash potash | – | – |
Renaissance | Quartz | Beech ash | Beech ash potash | Limestone | NaCl |
Baroque | Sand | Industrially produced potash | Limestone | As2O3 |