Quote:
Originally Posted by PhilNap
I think the black light test is not fool proof. For one, new items can be printed on old paper. Also, modern wax and parchment paper do not react under black light as you might expect. See the below image of both with a modern 3x5 and a vintage postcard.
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The wax coating (coating modern paper) might play a role in this as well. I'm not sure how anyone could feel comfortable with a damaged H version at this point.