ACPU has a known (to Adobe) problem of incorrectly resizing some outputs, which prevents scanning by iSIS. Lower in priority to them than working on Photoshop print pipeline, even though it disables the functionality it was created to have to work around the removal of the option to turn off color management.
Turning off color management can cause Windows (or Photoshop, not sure) to apply a conversion to sRGB to data going to the printer driver. An example of how this could occur is setting Photoshop (and maybe other apps) to "Printer Manages Color" and then in the printer driver setting "Color Management Off", in an attempt to work around the inability to apply "No Color Management" in Photoshop.
Latest version of iProfiler won't print. XRite says it is a known problem to be fixed in next release. Have to print TIFF to file and use ACPU. Interesting that XRite produces a product for which actually printing the test chart is a central feature doesn't place top priority on a bug that prevents it from doing so. the TIFF/ACPU workaround works but you still have to beware of the sRGB problem in Windows.
https://www.xrite.com/service-support/rgbprintertestchartwontprintini1profiler171onwindows "RGB Printer Test Chart Won't Print in i1Profiler 1.7.1 on Windows
The RGB Printer test chart will not print in i1Profiler 1.7.1...this is a known bug reported to engineering,.The RGB Printer profiling “Print” button does not work in the Test Chart workflow step. This has been verified and logged as a software bug to fix in the next update of i1Profiler. In the meantime, you have a few options:
1.Some users have reported that if they uninstall one of their printers (preferably one that you no longer use) and then reboot the PC, the “Print” button worked.
2.You can save the test chart out as a TIFF and then print it with all color management turned off.
3.You can uninstall i1Profiler 1.7.1 and X-Rite Device Services Manager in Control Panel > Programs & Features, reboot the PC, and then reinstall i1Profiler 1.6.7 using the following link
http://www.xritephoto.com/ph_product_overview.aspx?ID=1397&Action=Support&SoftwareID=1672 "
So with the ACPU resizing problem and the sRGB conversion issue and the nonprinting defect in iProfiler, and none of these things afforded much publicity, it is no wonder that people are having problems.
Says Dave Polaschek of the Adobe Photoshop printing team (2015):
"Picking "Printer Manages Colors" on Windows guarantees that your color data will be converted to sRGB. We could adopt XPS printing to get around that, but there are many new and exciting bugs waiting to be found by the first application to head down that path.
On Mac, Picking "Vendor Color Management" and "Adobe RGB" does not mean the color data will automatically be converted to Adobe RGB. It means that untagged color data will be treated as Adobe RGB. When I last discussed this with the Apple printing engineers, I got a long explanation of when color conversions will happen, and the printer driver gets a chance to say to the OS "Yes, I can use color data in that color space" or "No, please convert that color data to XXXXX profile for me" (where XXXXX is the default profile for the printer, which you can set in ColorSync Utility.app).
When using "Printer Manages Colors" on Mac OS X, with a printer driver that says "Yes, send the color data as-is" when asked about what the application is offering to print, that data will be passed to the driver without conversion. I've done this with CIELAB data. I don't believe Epson's drivers will accept CIELAB, but when last I investigated (when the x900 printers shipped), they would accept ProPhoto RGB when using "Printer Manages Colors." There was only one conversion of the color data to the printer's final profile, and that was done by the driver.
All else being equal, fewer conversions between color spaces is preferable."
Dave Polaschek said (2015): "This always happens. When using "Printer Manages Colors" on Windows, Windows ICM 2.0 assumes that any color data passed to it is in sRGB, so Photoshop converts the colors to sRGB (so users don't get wrong colors when printing). We can't know whether the user has picked ABW or not (the driver-specific print settings are a black box to us at this point), and we must provide sRGB to the OS in this case."
Dave's comments from:
http://forum.luminous-landscape.com/index.php?topic=122927.40 This thread also mentions some printing differences between PS and LR.
Adobe instructions for ACPU:
https://helpx.adobe.com/photoshop/kb/no-color-management-option-missing.html John Nack of Adobe re ACPU resizing:
http://blogs.adobe.com/jnack/2010/12/a-no-color-management-print-utility-for-photoshop.html [Thanks for bringing this to our attention. Apparently it’s a known issue, and we’d like to issue an update, but I don’t have an ETA for that happening (as enhancing Photoshop’s print engine needs to take priority). –J.]
ACPU does no color conversions at all."
Dave Polaschek — 10:24 AM on December 03, 2010 (Same link as John Nack above):
"On Windows, the main difference between using the mode that Michael describes and this application is that with Printer Manages Colors, the image data is converted to sRGB before sending it to the Windows print system (because that’s a requirement of the print system). So if your target is tagged with a color profile (it really shouldn’t be, but some are), there will be a color conversion done by Photoshop.
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Stan