A wollastonite containing glaze slurry was not sieved before use

Friday 7th July 2017

This glaze has just been applied to a bisqued tile. It contains wollastonite, which can insight-live.com/glossary/168">agglomerate in storage. It was propeller-mixed at high speed, but that was not enough to break down the white lumps (agglomerates). But they can be broken down by sieving the slurry through 80 mesh or finer. Many other materials behave in a similar manner (e.g. barium carbonate, iron oxide, cobalt oxide, clays, tin oxide, zircon, titanium dioxide).

Pages that reference this post in the Digitalfire Reference Library:

Wollastonite, Sieve, Agglomeration

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