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Notice how the bubbling from the off-gassing of the manganese has variegated the surface.
| Glossary | Reactive Glazes In ceramics, reactive glazes have variegated surfaces that are a product of more melt fluidity and the presence of opacifiers, crystallizers and phase changers. | 
| Materials | Manganese Dioxide A source of MnO used in ceramic glazes and the production of ceramic stains. Commonly made by grinding pyrolusite rock. | 
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