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 agglomerate in storage. It was propeller-mixed at high speed, but that was not enough to break down the white lumps (insight-live.com/glossary/168">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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