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Bleach will not clean a penny well at all - in fact, it will cause a reaction between the copper of the coin and the chlorine in the bleach. The oxidation will turn the majority of the penny black whilst also producing a green and white paste comprised of mainly copper hydroxides and also maybe some zinc hydroxide.

Unless you have a common circulation coin or a junk coin without a date, using any household chemicals, juice, soda, erasers, etc. will destroy its collector value.

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13y ago

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