[jcards]

I can understand the humidity factor as I live in Florida and some were in a closet with no ac and could get hot but then there are others that were kept in a cool dry dark area and it still happened, I think it is the chemicals and over time a breakdown occurs, basically all the cards will eventually change color, I just know the catalyst that helps it along. In Topps chrome the faces become a pasty white, just the skin tones turn color then rest of the card looks good. Unfortunately the cards are now worthless and don't look good, Its a shame because I even had BGS graded cards turn color, there is nothing that can protect them. So if you have mint older finest snd topps chrome cards that have not changed yet and they are valuable be vey carefull.