Donne, Juvenilia, 1633 (F1v, raking light)
Imaged under a raking light, this blank page reveals a great deal more texture than images usually do, including wrinkled (or cockled) paper, vertical wire lines, the bite of type as it pushes out the paper from the other side, and the bite into the paper from some uninked (or blind) type in the middle of the page (“These eleven Paradoxes”). Some copies of this edition have this imprimatur inked and legible; others, like this one, seem not to have included it, although the type was clearly left in the forme even if it didn’t print. (Compare this image to the one under usual flat lighting to see how different lighting shapes what we see.)
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John Donne, Iuuenilia: or Certaine paradoxes and problemes. London: Elizabeth Purslowe for Henry Seyle, 1633. (sig. F1v)
Folger Shakespeare Library, STC 7043.2 (CC BY-SA)