Soluble salts on a porcelain mug are causing plucking


Tuesday 27th June 2017

Fired to cone 10R. The porcelain contains bentonite and a plastic kaolin, both are contributing iron-stained solubles that come to the surface during drying. They tend to concentrate on this foot ring. The solution is to employ a little barium carbonate in the porcelain recipe to precipitate the salts. These could also be sponged or sanded off in the dry state.

Pages that reference this post in the Digitalfire Reference Database:

Soluble Salts, Efflorescence


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