toning of gum on stamps
Toning-Seek out stamps with clean, original undisturbed gum. A very light even tan is ok, but where you see spots leave it alone.Should it be a scarce stamp that you just must take custodianship of, you could isolate it.hen the buyer gets the stamp, they will very likely notice the toned paper when they put it in their album next to other stamps.I do not know how far the spores travel.I neglected to mention, the other kind of toning occurs from a chemical reaction with plastics.