this post was submitted on 07 Oct 2025
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Water that's boiling is 100 degrees C, as long as you're reasonably close to sea level. Boiling it longer doesn't make it hotter. If you want super critical water, you need to microwave it in a very smooth container. Please be warned that this is incredibly dangerous as s.c. water can cause horrific burns as it will boil and overflow when you try to pour it. It also doesn't make good coffee, it over extracts.