As the issue of print film used as camera film has come up a few posts ago, I was asked to comment on it:

Display films (and print films) in general have to 2 shortcomings concernig use as camera films:

-) very slow speed

-) their sensitization is optimised for the three dyes of the original film, not for the wide spectrum as in our environment

Something similar comes true for negative camera films. They are not necessarily good slide films. (Aside of the mask and Dmax issues.)
Here the problem may be that their dyes are to fit the sensitivity of the print material and vice-versa.

In the whole reproduction line we got the colour scope of the object world at the beginning and the viewers eyes at the end. What happens inbetween may be a total different story.