I‘m seeking advice from someone acquainted with the types of plastics that corrode coins. I know there is a specific type of damage that can be done to coins (PVC corrosion?) and I want to know what types, if any, can corrode or damage coins.
Plastic does not corrode coins. Coin holders known as flips can contain PVC. These can cause a green haze on a coin which is very difficult to remove. Corrosion is caused by environmental gasses, and if a coin is buried. When early American copper coins were struck, the copper that was used was already corroded. This was due to copper sheets being kept at the bottom of ships bringing the copper from europe. The exposure to salt water corroded many of the copper sheets. This is why many early US copper coins are difficult to find without corrosion. With modern coins, you should not have any problems concerning corrosion.
Plastic does not corrode coins. Coin holders known as flips can contain PVC. These can cause a green haze on a coin which is very difficult to remove. Corrosion is caused by environmental gasses, and if a coin is buried. When early American copper coins were struck, the copper that was used was already corroded. This was due to copper sheets being kept at the bottom of ships bringing the copper from europe. The exposure to salt water corroded many of the copper sheets. This is why many early US copper coins are difficult to find without corrosion. With modern coins, you should not have any problems concerning corrosion.
