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4

Try a magnet - dollars to doughnuts, those are somewhat peeled and rusted chrome plated steel, and the blue is a normal steel oxidation color, and not toxic (also, were you planning to drip food down there, scrape it off and then eat it? If not, nothing to worry about regardless.) They are stunningly unlikely to be copper, though there may be a minuscule ...


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Edit3: Bleach will react with copper to produce copper hydroxychloride and as wikipedia says, is commonly found in metal corrosion products. Iron (II) chloride is often greenish colored. Iron and copper chloride will react to produce iron chloride. Looks like bornite (Cu5FeS4) (yes, bornite is toxic too). But it's unlikley, unless someone spilled some ...


1

I'm a little skeptical because of how purple those stains are, but if these drip pans are made of copper then it could well be Verdigris. This is likely happening because the plates were not sealed properly and vegetable oil was spilled and not cleaned off as heat was applied over time. If I were you I'd scrape some off (it's OK if some powder comes into ...



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