Then I printed a third test print with my PS working space set to sRGB and no color management anywhere in the driver. That print matched my second print (assigned sRGB Profile) and also mimicked my profiled monitor.
So I have determined that, for sure, if I set PS to no color management and the printer to no color management the working space determines the final printed output. That then leads me to believe that a profile must be assigned to an untagged image and that profile must/should match the default profile in CU or that the PS working space must/should match the CU default profile. Is any of this making sense?
As this is something I haven't tried, I have just run two tests with some changes to my default working space (under Edit, Color Settings...)
1. Edit, Color Settings.... Color Management changed to Off.
Opened TC9.18 test chart and printed on matte paper with Photoshop CS4 CM off and print driver version 6.55 CM off. The result was still noticeably wrong and no different to the print that I had produced with my default working space set to ProPhoto.
2. Edit, Color Settings.... default RGB working space set to sRGB.
Opened TC9.18 test chart and printed on matte paper with Photoshop CS4 CM off and print driver version 6.55 CM off. The result was still noticeably wrong and no different to the print that I had produced with my default working space set to ProPhoto.
Note that under Photoshop Edit, Color Settings... I always set Color Management Policies to Preserve Embedded Profiles for RGB, CMYK and Grey. I also select Profile Mismatches: to yes for "Ask When Opening" and "Ask When Pasting"; and I also select Missing Profiles: to yes for "Ask When Opening".
It might be helpful if a common methodology is used to make the tests. Indeed it was only when Wayne precisely followed my test methods back in January that he finally saw what I have been seeing.
Leopard / Snow Leopard
Mac Photoshop CS4
A different version of Photoshop on either Windows or Mac or i1Match for comparison.
Epson 7900/9900
Test chart TC9.18 (a small section of it is enough to see the error)
Matte paper (Wayne and I have been using Epson Enhanced Matte)
Open target with Mac Photoshop CS4 with CM off.
Print with Photoshop CS4 CM off and print driver CM off.
Repeat with a different version of Photoshop or print target with i1Match.
Compare...
Myself, Wayne and others concluded that a version other than Photoshop CS4 is required to correctly print targets under Leopard and 7900 driver 6.39. I am close to reaching the same conclusion with Snow Leopard and 7900 driver 6.55.