Preventing Black Spots

Depends how long you wish to keep them sealed! Best way if your not going to open them for a long time is use food grade vacuum sealer. Then put that in a food-grade zip-lock baggie. Second way is two zip-lock bags one inside the other. a small container of desiccant along with them would be very helpful. Third way is purchase from a coin dealer a box to hold rolls which contains corrosion resistant materials in the box itself. A package of desiccant (drying agent) should always be around.

Just my opinions. Hopefully you will get a few more.

edgman

Thanks so much. Wish they were still made from copper so one would not have to store so carefully.