That ribbon reminded me of the "first" color photograph:
https://upload.wikimedia.org/wikipedia/commons/7/7f/Tartan_Ribbon.jpgThe first color photograph made by the three-color method suggested by James Clerk Maxwell in 1855, taken in 1861 by Thomas Sutton. The subject is a colored ribbon, usually described as a tartan ribbon.
After I figured out all the details of sheet film, including reloading film holders in a change bag, the only problem I had was trying to cut 4 X 5" sheets into 9 X 12 cm sheets in the darkroom with no safe light.
Discovered that apparently, the friction of cutting them with a cutting board created microscopic sparks which were visible on the developed negative. Not too bad, but they were there.
Pain in the arse anyhow, since you had to set up the cutting board for one cut, put the film in a safe box, turn on the lights, reset the stop on the cutting board, then repeat for the other edge of the film.
That was when 9 X 12 sheet film was getting scarce as rattlesnake feathers in this country.
I used the rollback adaptor for a while, but it was not like the full-sized sheets at all. Sort of like driving an eight-cylinder car that was only running on 6 cylinders.
Terry