Digital BW, The Print

It would be good if the community berated Apple on this stuff

http://www.apple.com/feedback/macosx.html

On 2 Mar 2012, at 10:55, Steve Kale wrote:

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> There do appear to be issues with QTR, ABW and OS-X (at least with 10.6.8) but they appear to be surmountable. I exchanged messages with Roy on this and he was, as ever, extremely helpful (and patient as I refreshed my memory on some of this stuff that I've been away from for awhile). He commented that, at least with QTR, OS-X always converts a greyscale image to Generic Gray Gamma 2.2. I decided to run a few tests with ABW. At least if PS is set to Printer Manages Colors (as this is what I was testing) OS-X 10.6.8 converts a greyscale file (whether tagged or not) to Generic Gray Gamma 2.2 Profile before it gets to Epson ABW as well. I printed an untagged step wedge, a step wedge converted to Generic Gray Gamma 2.2 Profile, a step wedge converted to Gray Gamma 1.8 and a step wedge assigned with Generic Gray Gamma 2.2. The first 3 produced an almost identical L* ramp from the printer (similar enough for the variance to just be paper, ink drying etc). The last step wedge had a much different profile (and a more linear L* ramp suggesting no colour management adjustments). 
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> If the above is correct then when printing targets for QTR Create ICC profiling we would, I believe, need to assign Generic Gray Gamma 2.2 to the target before printing (Printer Manages Colors and your preferred ABW/QTR settings). That way K values sent to the printer aren't altered. When printing an image with the resultant QTR ICC profile, we would need to convert the image to this profile and then assign Generic Gray Gamma 2.2 before printing with Printer Manages Colors and the ABW/QTR settings relevant to the selected QTR ICC profile.
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> It would be great if someone else using OS-X and ABW could confirm the results of the tests I did - and also if someone using 10.7.x could do the same.
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