Sod it. When I'm back in London I'm going to immerse some raw copper in 10% citric acid and see what happens.
You'll get some hydrogen maybe?
Don't worry Dad, I'll wear my lab coat and goggles when I insert the lit splint
@Chalfie started
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Sod it. When I'm back in London I'm going to immerse some raw copper in 10% citric acid and see what happens.