Great work!
It sort of reminds of one of the first scenes of the Russian movie Стиляги (2008) that shows how they made bootleg copies of records...using X-Ray film base:
https://www.youtube.com/watch?v=UavmKtLIV3Y&t=126s
https://en.wikipedia.org/wiki/Stilyagi_(film)#Historical_context
@KrajciTom @miunau thanks! I actually have a bunch of old x-rays I got for this purpose