We can eliminate the few steps from the process and get similar results.
You can mix very thin crystal - ultra clear , transparent , optical - wet epoxy with silver bromide and silver iodide and take pictures with it after it dried ,epoxy dries at dust free room for 24 hours. Only rule , you have to sand it with 1000 grid sanding paper to developer able to contact with chemistry.
This is used at copper epoxy antifouling paints.
What anyone says to that ?
Otherwise , cellulose is one of the widest available chemical , comes in hundreds of forms and used at furniture instrument lacquer.
you might as well make your own silver emulsion
no point in reinventing the wheel
making emulsion is not hard
you can make it with just silver nitrate and salt water and gelatin
or you can mix in the bromide and iodide with the gelatin + silver nitrate.
i made some when i was about 20 .. if a 20year old college student
in a kitchen, with no internet, no help no instructions can make it, i am sure
you can make it too .. and you can make silver gelatin tintypes +dry plate ambrotypes
if you make your own reversal developer, and not have to deal with ether, nitrocellulose, or cyanide fixer.
if you it right they look very much like the wet plate tintypes ( the dry plate ambrotypes look different )
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collodion is different than lacquor and cellulose