It’s practical chemistry time folks. With a few moderately easy to obtain chemicals (Gelatin, potassium bromide, potassium iodide, and silver nitrate) you can create your very own glass plate films. These would be used in a medium format camera or even a pinhole camera (if you can stand long exposure times).
You can find more information on alternative photographic processing from these books:
Silver Gelatin: A User’s Guide to Liquid Photographic Emulsion
Historic Photographic Processes
Or from these links:
Alternative and Historical Process Links
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