Paper edge under electron microscope.
https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...116#post207562
https://www.homemadetools.net/forum/...832#post206565
https://www.homemadetools.net/forum/...747#post186501
https://www.homemadetools.net/forum/...298#post161591
https://www.homemadetools.net/forum/...516#post158794
