Latent_Image.png 1,368×1,402 pixels

“Printed out” image on a 35mm B&W film, overexposed by approximately 24 stops (about two days of exposure at f/2), without any chemical processing, showing that the silver clusters can grow up to visible sizes without developing.

https://en.wikipedia.org/wiki/Latent_image#/media/File:Latent_Image.png