Digital BW, The Print

> From: Paul Roark <paul.roark@...>

> 
> 
>> ... Where could I see what the "Grey Gamma 2.2
>> space" does as opposed to the "Dot Gain 20" space regarding the
>> overall compression parameters (curve or actual pictures, please).
> 
> I find Photoshop Elements 4 to be the best program to see the differences.
> Starting with the R220 Readme, I'm converting to Elements 4 as the standard
> program.  Its simplified treatment of color spaces alone makes it worth the
> $50 on eBay.  To see the differences, in Elements 4, one just opens a
> 21-step test file in the "No Color Management" mode (set in Edit>Color
> Settings).  This strips off any embedded profile, so it's "untagged" (but
> treated like GG 2.2 -- the most common default gray space from what I can
> tell).  Once open, one can then go to Color Settings and alternatively check
> GG 2.2 and Dot Gain 20%, and see the monitor display change.  These changes
> are reflected in the color managed printing that ICCs provide.  (They are
> not carried forward in non-color managed workflows, which include my older
> approaches and "Advanced B&W.")
> 


A word of caution here.  I don't think you can ever look at a step wedge on
your display without colour management.  Even with "colour management off"
in PS a step wedge is still colour managed to the display.  Open a
non-tagged step wedge and choose not to colour manage it.  The image on your
display still reflects your workspace. As Roy highlighted not too long ago,
you can't have one profile colour management.  You need a source profile and
a destination profile.  If a document does not have a profile, ie there is
no source profile, PS ascribes your workspace for the conversion to your
display profile.  A good way of looking at this is to open the untagged step
wedge and watch it change in appearance when you change your workspace
setting.