adamjh3
Forum Culinary Powerhouse
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Yup. You don't have any practical way of telling if they are chemical or thermal. Better to protect yourself by assuming they are chemical and treating them in such a way that it's going to stop the burning process regardless of the underlying cause.
Shake and bake.
Pop quiz kiddies: What's the chemical historically used to treat WP burns? Why?
Bonus question: Why is WP fun at raves?
Don't know if this is what you're looking for because you said historically, but my EMT book says copper sulfate neutralizes WP, so I imagine that would be used at least to help clean the wound.
But isn't copper sulfate toxic?