Posted By:
John SDan,
I have some gum pieces as well...I always wondered if Violet and Mint chips are discernable by sight. Some of my Colgan's cards have Violet colored staining and/or toning. Since yours can be traced to their original owner, it is unlikely that the staining on my cards could be attributed to the gum (100 years might have had some effect on the gum however). My gum pieces look just like yours, black mold and all.