POTASH - FELDSPAR
Potash Feldspar Feldspars are distinguished thanks to their structure and chemistry. Potassium (K) feldspars are polymorphous, so they have the same chemical composition and their molecular weight is 197.12. Potassium feldspars melt at about 1200ºC. They might also produce a crystalline phase which helps to its opacity. That’s the reason why in industry potassium feldspars are often especially used for opaque enamel, while sodium feldspars are used for bright enamel.