Hi. I have been working with epson printers for many years. Yes, quadtonerip is a great tool for dosing inks individually (like any rip does, but at a much higher cost) thus enabling you to search for your own curves in your own setup by setting ink limits and so on.
That said, I later discovered that once you get hold of the process, you can get perfect results with the epson driver as well by playing with the parameters ,like Christina Anderson suggests in her gum printing books.
So, the truth is that all those oversophisticated "methods" , patented or not, are only marketing. Any printer which uses inks dense enough to let you reach pure white in your process is good, that is, inks that block UV radiation to a suitable extent. Qtr is beautiful because you can choose to use only those inks that actually block UV, but it does not really matter in practice, because you just orint out your step wedge, read the results (densitometer or scanner), plot your curve, play around a little to adjust it.. and you're done.
The only question that really matters is if Canon inks block enough UV, and that is to be tested. Epson inks are ok.
Hope this helps
Regards
Given big discounts through Wednesday, looking to purchase either...
Canon Pro-4000 ($3500 https://www.bhphotovideo.com/c/product/1259008-REG/)orEpson SureColor 9000 ($4000 https://www.bhphotovideo.com/c/product/1189030-REG/)The Canon seems to edge out the Epson in features such as non-clogging (even with occasional use only or in low humidity), greater gamut (barely), replaceable printhead, ink usage (esp. with no matte/photo black wasting), clear coat “ink”, built-in hard drive, WiFi, print accounting/reporting, etc.BUT Canon does not offer a straight-through path (eg, metal print panels) nor does it seem to be supported by QuadtoneRIP.QuadtoneRIP seems critical to enable me to dip my toe into Digital Negatives for Platinum Prints (?)Any wisdom? (much appreciated)-c