I thought some of you might find this interesting.
http://www.atlasobscura.com/articles/the-forgotten-china-girls-hidden-at-the-beginning-of-old-films (http://www.atlasobscura.com/articles/the-forgotten-china-girls-hidden-at-the-beginning-of-old-films)
"Used as quality control, these haunting images were never meant to be public...."
Oddly enough, I've seen some of these, but never gave them any thought.
Thank you for posting this. It is another wonderful reason to preserve film in a digital age.