Just returned from Photo Plus East in NY today. Not to muddy the waters any more, but I will share a few thoughts. First, I applaud Hp for often enlisting its engineering staff from Spain to help out on the trade show floor. It's great to talk to highly knowledgeable people about products they have worked on and are justifiably proud of. I happened to remark to one such Hp engineer that I was a potential customer but the on-board spectro actually seemed redundant because I already own a Spectroscan with Profilemaker 5 software. My remark prompted a very interesting and refreshingly honest reply from this Hp engineer. He said essentially that the spectro was necessary to achieve the printer's closed-loop calibration consistency, but my standalone version of Profilemaker 5 would actually build an even higher quality profile than those produced by the printer software, even the APS option. He then advised "you can import your own custom reference target data to print, use the on-board spectro to generate your measurements, then export the measured color patch data as a text file to build an even better profile with your external application". That advice confirms others' comments about the Z3200 spectro's data exporting feature, and presents a justification why one might want to do just that. Kind of reminds me of Bill Atkinson's "bouquet of profiles" made with different profiling apps.
I had the following exchange with an Epson rep about the HDR ink in the 7900: I said "I assume the orange ink in the HDR set is being blended and swapped for yellow and magenta inks to make skin tone colors". He replied, "Absolutely! The orange ink improves the skin tone reproduction and our beta testers have told us they see noticeably better skin tones". I then asked" How does the new orange ink affect the light fastness of the skin tones". He replied - "It's been tested by....(an independent lab)". I said "but this lab's published testing methodology doesn't include any colors other than two levels of cyan, magenta, yellow, and gray. Do you happen to know if the testing was modified to handle the new HDR ink set?" He then answered "Well, the orange ink is not the limiting factor". Our discussion had quickly reached what I know to be the current limits of light fade testing in the industry. The legacy testing procedures of the traditional color print era which are still in use today for inkjet prints are not well equipped to rate the fading response of new multi-colorant systems. I am looking forward to getting some samples into my own tests which can differentiate skin tone performance, but the printer's limited availability probably mean it's going to be a while before I can get some test targets printed.
Epson also had a very nice set of three prints mounted side-by-side that were made from the same digital image file on a 7800, 7880, and 7900. The image was one of those anorexic looking models dressed in a bright "floral pattern" dress and vivid lime green hat to illustrate the respective color gamut differences in the K3, K3 vM, and HDR Ultrachrome ink sets. The dress pattern had a dizzying array of magenta, red-magenta, violet-magenta, and lime green color regions. The dress pattern was obviously chosen to accentuate and reveal the differences in color gamuts of the three ink sets. My take was this: Yes, you could indeed see subtle increased color vividness in the magentas, and greens in the expected order from K3 to K3vM to HDR. But the difference was extremely subtle even for this image purposefully chosen to illustrate the differences. These differences would not be considered significant by the vast majority of viewers or even noted in anything other than a direct side-by-side comparisonof prints. Moreover, there were other more significant lightness and contrast differences in the prints which were probably attributable to the three translations of the file rendered by three different profiles. Thus, there were various local regions in all three prints that I favored slightly. Likewise, for skin tone reproduction. Kind of like making three "identical" custom prints in the old darkroom days, and preferring one slightly better than the other two because the hand dodging and burning came out ever so slightly differently! I think the printmaker(s) did a good job with a very challenging assignment, ie., to take a single digital file and reproduce it exactingly on the same paper type using three different printers in order to illustrate very subtle differences indeed between the three printers and their respective ink sets.
With respect to GD, bronzing, and Gloss enhancers, by examining a variety of prints not under glass, I think that neither the Z3200, nor the Canon, nor the Epson offerings have totally eliminated the need to choose substrates wisely, and in some cases resort to post coatings if residual GD and bronzing issues are still of concern. In theory, a gloss enhancer should eliminate GD and bronzing for all glossy/semigloss papers, but this pigment-free clear ink can sink right into a number of third party papers, in some cases making image surface appearance worse rather than better. Hp to its credit has recognized this tendency of the clear ink to sink right into some image coatings rather than stay on top, and therefore more user control over GE inking levels has been added to the Z3200. The HP engineer I mentioned above conceded that despite the added control over GE, some third party papers are still not always responding well to the GE. Again, I found his candor very refreshing.
My sense from the 7900 samples I saw, is if you already own a 7800 or 7880, IQ improvements from the HDR ink technology on the 7900 are subtle and not a compelling reason to upgrade, but increased speed, likely improvements in clog-free reliability with Epson's teflon nozzle coating technology, plus easy PK/MK switching are all a nice step forward. I don't pay much attention to what the official customer demographic is for the Epson 7900. Photographers and fine art printers are going to embrace it for sure. Schewe, your 7900 print with the image of clasped hands superimposed with the world map that was on display at the Epson booth was truly captivating, and it also left no doubt about the technical precision of the 7900.
Lastly, I was amazed to see learn how deeply various dealers at the show were willing to discount the price of a Canon ipf X100 series printer. This printer line has the requisite internal calibration/linearization technology to handle printer/environment/media variability, but not the full spectro/profiling capability. However, at it's current street price point, one aught to take a good hard look at the Canon printer line before settling on a Z3200 or Epson 7900. You can buy a lot of custom made profiles for the price differential!