Question time . . . . Al2O3

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Unit 6 Topic 11
Oxide Qualities
Excessive amounts of Al2O3 in a glaze can cause . . .
Crawling, pinholing and greyish colours with opacity.

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A soft surface with mottled uneven colour saturation.
Too much blue generated from rutile used as a colourant.
A surface which varies from shiny to matt and has crystals.
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