Hi all
I'm very frustrated to see that a number of copper / bronze coins which I stored in plastic coins envelopes, within a wooden box, have developed green verdigris or similar round the edges, and also feel 'sticky' on the obverse & reverse. I'm sure that the envelopes claimed to be 'coin safe' but they were from EBAY a few years ago. Would a move to more expensive plastic coin envelopes or albums prevent this in future, or is all plastic a bad idea for copper and bronze? Any suggestions for safe storage welcome (I'm aware the Lindner type coin trays would be better but these are quite low value coins, probably not worth buying multiple new trays for).
And is there a safe way to remove the mild verdigris / stickyness?!
Apologies if this has come up before, and thanks in advance for any advice, Paul
