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  1. I recently just finished my first course in ceramics and it was great! I might be addicted now. anyways... I was experimenting with using a red iron oxide wash on a couple of my mugs and I love how they turned out. I painted on the iron oxide wash pretty heavily underneath a korean celadon glaze and it made this amazing effect that I've unofficially dubbed metal tyedye. Later when I was looking at them I realized that iron rusts and is, obviously, metal which is not good in microwaves. There are some spots on them that look and feel more like metal than glaze. Are there any health risks to using these mugs for drinking (coffee, tea, etc. ) on a regular basis and or using them in the microwave?
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