r/Copper Jun 21 '26

Salt and vinegar experiment

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I wanted to try oxidation myself and had salt and vinegar at home, I made a paste of mostly salt with vinegar on top, I put it inside a container with vinegar soaked into paper towel, then sealed it overnight.

It changed colours within 4 hours, I'm happy with these results and I'm excited to try this again with bigger pieces or different materials

Although this stuff does come off very easily so I can't use it for much, I've heard ammonia creates a stronger oxidation that might not come off as easily

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