Re: The color of gray
Re: The color of gray
- Subject: Re: The color of gray
- From: Peter Miles <email@hidden>
- Date: Tue, 02 Sep 2014 18:45:17 +1200
Florian Höch wrote
> because around a decade ago Adobe decided they would
> no longer support absolute colorimetric for RGB display profiles (you
> can select it, but it'll use relative colorimetric behind your back).
It's starting to make sense!!
Hmm....
With our Epson7900 printers, "AdobeRGB White" gets inked when we print Absolute colorimetric from photoshop. I did a quick check on the numbers.
When I print using photoshops "Absolute colorimetric" into our Epson Premium Luster 260 (CMYK) printer colorspace, "AdobeRGB White" gets sent to our RIP as 0,1,2,0 CMYK .
So Judging by both the CMYK numbers I'm getting for "AdobeRGB White", and how the resulting print hues looks _very_ similar to my 5000K monitor when the print is viewed in a GTI viewing booth, it would appear....
That with the printer colorspace profiled as a CMYK space and Adobe doing the Absolute transform from AdobeRGB to the printer colorspace, what I effectively get is a relative colorimetric transform from AdobeRGB's D65 white into D50 white, followed by an Absolute Colorimetric transform from this D50 space into the CMYK printer color space.
BUT... I would expect that if the printer colorspace were to be profiled as an RGB space, then the same Adobe "Absolute Colorimetric" print pipeline would result in "AdobeRGB White" remaining un-inked on the print. And so the print would then take on a colder appearance compared with me having via a CMYK printer profile. Because now, with an RGB profile as the destination, it would be Relative Colorimetric all the way to the cold paper white of Epson Premium Luster 260.
Gosh! I think the fog is lifting at last!
Thanks everyone for the great feedback.
Regards
Peter Miles
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