i just got a small new uv light and ive started checking all my items over (they all look fine) but 2/3 of my postcards seem to glow dark green(?) and there are some dark green spots on the back of one postcard?
(they dont seem to glow like modern paper)
is the dark green glow due to storage?
thanks
(they dont seem to glow like modern paper)
is the dark green glow due to storage?
thanks
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