4% iron oxide in a clear glaze. Unscreened. The result: Fired specks.


Thursday 11th May 2017

Iron oxide is a very fine powder. Unfortunately it can agglomerate badly and no amount of wet mixing seems to break down the lumps. However putting the glaze through a screen, in this case, 80 mesh, does reduce them in size. Ball milling would remove them completely. Other oxide colorants have this same issue (e.g. cobalt oxide). Stains disperse much better in slurries.

Pages that reference this post in the Digitalfire Reference Database:

Iron Oxide Red, Agglomeration


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