Technical question re neg on print film ?


I have a can of picture neg film and neg track originally from MovieLab. Rather than the picture neg being on negative stock, on appears to be a neg on print stock ( current guess). Te marking on the side of the neg says “Eastman 23 safety film”

The year is 1970. I talked to the film maker a few years ago but I am not sure they dealt with the technical side of it.


Also in the gallery are the lab cards that were wit the can. The positive renderings are from some automatic software (but does not give stable colours).

I notice the film seems to have limited dynamic range and would require a lot of “curve correction shot to shot. The lab card suggests this may have bee the case when printing to positive film.

Would this negative have been used to make a final print?
Why would this type of negative been used?