There is a memory that the verdigris (copper oxide) that adheres to 10-yen coins and the like was a deadly poison that would kill you if you licked it, so you absolutely must never lick it
I remember that the verdigris (copper oxide) that adheres to 10-yen coins and the like was a deadly poison that would kill you if you licked it, so you absolutely must not lick it. Also, I remember there being countermeasure coatings for copper-use products like copper wire, along with labeling that they were coated, and that the government and international organizations thoroughly investigated the toxicity, found the harmfulness, and moreover determined it to be a strong body-accumulating toxicity (electricians who had worked in electrical construction for many years, upon reaching old age, would have numbness in their hands and feet or would have gaps in their memory), so coating had been made mandatory, and yet there’s this story that all of a sudden the “countermeasure coating applied” labeling vanished into thin air.
This case is part of the Mandela Effect case database based on "The Window of Opportunity: A Guidepost to the Mandela Effect — The Ultra-Secret X-Files" by Aoyama Takuto.