Glaze opacity refers to the degree to which it is opaque. There is more than meets to eye to the subject of opacity control.
Opacity of ceramics glazes is normally achieved by adding an opacifier like tin oxide or zircon. However there are chemical profiles that can turn transparent glazes milky and make it cheaper to opacify them.
|Oxides||ZrO2 - Zirconium Dioxide|
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