Digital BW, The Print

Tyler Boley schreef:

>  with the desired luminance correction and preview, for workflows that require an rgb data path, and think Qimage is like this as well?

Correct Qimage only knows an RGB path. But it will convert greyscale 
data to neutral R=G=B on the fly like QTR does the opposite on the fly. 
That is what probably all the drivers do that do not know more paths 
like some RIPs have. With QTR ICC profiles the greyscale or the RGB 
version I prefer to do the conversion in Photoshop instead of Qimage, 
Roy once discussed it with Mike Chaney of Qimage and the man Marty?of 
LCMS that Qimage uses for its color management, so the RGB type profile 
should work but I have seen shifts that were not normal. Printing from 
Picture Window Pro with QTR profiles was even worse.

I'm not familiar with Lightroom but I would advise to test it thoroughly 
too by comparing targets printed through PS and LR. As I understand it 
Lightroom has Prophoto as its basic color space, a 1.8 Gamma type. 
Whether everything goes through an extra conversion as a result of that 
is something I'm curious about. If so16 bit may be a better choice than 
8 bit. There were some rudimentary CM controls on the printing output in 
early versions like BPC missing or automatically applied. I have no 
complaints about Qimage's CM of color but with less often used B&W CM 
workflows there just isn't enough discussion to get it on the rails, 
might be the same for Lightroom.


-- 
Met vriendelijke groeten,   Ernst


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