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I remember talking with Lynn about razor edges a few years back. He mentioned that some full hollow edges are not much thicker, at the apex, than a sheet of tin foil. Mighty delicate in spite of the...

I don't have the wherewithal to post such photos, and I've never rolled an edge. If you have a microscope or a 30x eye loupe, and some extra razors you could do your own experiment in rolling an edge...