You need to remember that color paper for printing color negatives has a fairly high contrast (about 2.2 IIRC), since color negative film has a fairly low contrast (about .6 IIRC) to give the file the extended exposure range needed for consumer photography.

The paper is tungsten balanced and includes an allowance for the film orange base color.

All the recent color negative papers I've run into are RC based so I don't know how you could make the base transparent. Years ago (when I worked on color paper for EK) I visited a large commercial lab (Olan Mills) that could actually strip the emulsion from the base and put it on canvas. They made it look easy, but I never had much luck.