OK thanks - so you are basically trying to extend longevity using other inks. You probably know about the experience running Cone inks through Epson printers as quite a few people do it; however the real novelty would be running HP inks through them, along with the custom RIP. Where do you intend to get the custom RIP configured? Can you do this yourself?
Can't QTR do this, using a spectrophotometer?
If your research indicates that this is a completely novel concept with no assurances of whatever outcomes, are you planning to experiment regardless?
That's the whole point of experimentation, isn't it? If it's already done and proven, it's no longer an experiment.
And, really, to me, the current options aren't that satisfactory. Not only do you get colour shifts, but, since the colour inks are used for luminance as well as chroma, you get luminance shifts between various parts of the image, too, so that, when the colour fades, the remaining black ink doesn't give you a black-and-white image that looks anything like the original.
And once done, how do you intend to get the comparative longevity tested?
Firstly, the rough-and-ready bush method - make three test prints using this method, keeping one unprotected, coating another with protective spray and framing the third under museum-grade acrylic or glass, and do the same with one or two normal colour prints using Epson or HP inks and printers. Then stick them on my rear windshield and drive around for a few months under the Australian sun, exposed to the atmospheric pollutants in a big city, and measure each of the colour patches again using a spectrophotometer. You could also do further tests, exposing prints to various concentrations of bleach and sulfuric acid for various lengths of time and comparing the fading exhibited to that exhibited by regular prints.
If the tests are positive, then the next step would be to submit some test prints to Aardenburg, together with detailed printing methodology so that it can be replicated by anyone else using the same inks, and getting some formal testing done.
Now I just need to get access to a printer I can tinker with - as I currently can't justify the cost of maintaining a printer at home, I outsource all my printing, often having printers print images using all sorts of methods and print surfaces. But this is something different entirely!