Does The Carbon Spot On This Coin Hurt It ?

Along these same lines, about 10 years ago I put together a few of those 1982 Lincoln Cent year sets, (the year with different size dates, different compositions; I think it came to about 7 different varieties. The other day I pulled a couple of those out where I had put them into the black cardboard holder and then placed them in the plastic/vinyl? sleeve. (probably loaded with PVC) Talk about damage coming out on a coin after "encapsulation". There were several nice prominent fingerprints on some of the cents where I had (I won't say unknowingly because I knew better, just too lazy to take precautions!) pushed them into the cardboard holder with great force. That was nice first hand proof for me that contaminants on coin surfaces can and do show up years later. So, buy those modern red encapsulated coins with caution, someone might have sneezed, touched, breathed, or whatever before the coin went into the slab!