I ran the experiments, and made the contacts for the Kodak.
Two sheets EPP. One normal and one overexposed by two stops:
After printing the grey card to within a few points of neutrality (hey; I'm lazy and cheap - so sue me!), the color over all is very close to normal. The contrast is a little jacked up, and the secondaries start losing their accuracy; notably loss of green in the colors that have green mixed in. For example, chartreuse patch on the chart became very close to plain-ol' yellow. The greyscale and primaries (RGB/CMY) all look very accurate, and all simply look like more saturated versions of the ones on the chart. When the grey card is printed to middle grey, the seven-step gray scale only shows tonal separation on the lower half of the scale. The two brightest patches are pure white, and the next brightest is only a very light grey. There is separation between the darkest patch and the next darkest patch, albeit not a great deal. Exposure f/5.6 at 24 sec. Filter pack 90Y/45M. The paper box (Supra Endura surface E) calls for a starting filtration of 55Y/65M, so this is not a huge correction (+35Y/-20M). I usually apply more Y correction than that off of the box recommendation when printing normal color neg. film, and often more M correction (though it is usually +M instead of -M). A correction of +35Y/-20M means that the film must go about 35 yellow and 20 green when crossed. So, the final word from the test: EPP has jaundice (though it is easily curable)!!!
In the over two example, when it is printed down so that the grey card looks like a grey card, the results are FAR more "normal" looking. In fact, they look *extremely* normal to me, especially in the aspect of contrast. Saturation is lower, and so is contrast. There is greater separation between the lower tones on the grey scale, and the second-to-brightest patch actually shows a tiny bit of grey tone. Exposure f.2.8 at 30 sec. Filter pack 90Y/45M. The grey card is more cyan than the normally exposed example, but not by a huge amount.
The Astia film came out with a heavy green mask on the film.
When the Astia was printed at the same filtration as the EPP, it looked as though the MacBeth chart and grey card were swimming in a glass of water dyed bright primary red. It looked like a photo taken with a primary red gel over the lights, or a #29 filter over the lens. Additionally, at the same exposure time used for the Kodak, the Astia images print darker. As with the Kodak, the shot at EI 25 is less contrasty and less saturated than the shot at EI 100. One thing that is definitely interesting is that the shot at EI 25 is not overexposed by as much as the Kodak shot at EI 25. The difference between EI 100 and EI 25 is greater with the Kodak. They also look lower in contrast and saturation than the Kodak, though I can't judge this yet. I have not had the chance to make the proofsheets corrected for the Astia yet. I was running out of time, so just banged off one "shotgun" attempt at the Fuji: f/2.8 at 60 seconds at 175Y/145M. It was an overestimation, and everything on the Fuji is heavily cyan now (though my exposure extrapolation was almost perfect). Fuji paper is also significantly colder than Kodak paper when they are both printed at the same filtration, so the Astia is definitely workable. If the Fuji cast is able to be tamed even on Kodak paper, then it can certainly be tamed on Fuji paper. I just need to get in and do it before I can report the results any further.
Even though this is 4x5, it looks like perfectly printable results will be obtained...as they always have been before when I have used 4x5 cross processed...and this has been almost every time I have cross processed. Why is it that it is hard to get printable results with 4x5?
I did not try the contacts using a blank orange mask in addition to the filter pack. Should I be doing this to more properly run this test?