Fluxes for Ceramics and Glaze - The Spruce Crafts
Magnesium fluxes include: Magnesium carbonate: flux for high-fire range, increases glaze adhesion and viscosity. Used for matte glazes. Talc: Used as a flux in low-temperature clay bodies, and as a flux in both low- and high-fire glazes. Dolomite: A calcium-magnesium carbonate flux used in the high-fire range when both elements are desired.