There is an industrial film from the 1930s called "The
Alchemist in Hollywood" on processing motion picture film
available at Archive.org Made by Consolidated Film Industries.
Shows rack and tank work.
Its in two parts:
https://archive.org/details/Alchemis1940
and:
https://archive.org/details/Alchemis1940_2
Archive.org allows viewing directly at the site or
downloading the movies in a choice of formats.
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
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