Fluxes are the materials we use to bring down the high melting temperature of our glass formers. Without fluxes you would need to fire your kiln to 2000°C (3632°F). That’s pretty hot. Hotter than our kilns can typically go to.
The fluxes are mainly found in the first two columns of the periodic table (with the exception of Zinc, also a flux).
The alkali metals, primarily Lithium, Sodium and Potassium are our primary fluxes and are in the first column of the periodic table.
The alkaline earth metals are our secondary fluxes and consist of Magnesium, Calcium, Strontium, Barium and Zinc. The first four are in the second column of the periodic table and Zinc is in the 12th column but behaves the same.« Back to Glossary Index