Barium Carbonate / 100 g

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Barium carbonate is used as a glaze additive acting as a flux, matting agent and crystallising agent. With certain colouring oxides it produces unique colours that are difficult to obtain by other means; with zinc oxide it promotes crystal formation in matt glazes. Due to its Xn classification and the possibility of leaching to the surface, it is not recommended for dinnerware. A fritted form of barium (BaO – barium oxide) is often used for safer application.

Barium carbonate is also added to clay to precipitate soluble salts (calcium and magnesium sulphates).

BaCO3, or barium carbonate

Harmful (Xn)
R-phrases	R22
S-phrases	S2 S24/25