Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, CDTobie@... wrote:
>
> 
> In a message dated 6/6/07 6:29:11 PM, michele@... writes:
> 
> 
> > Tobie, I made a profile reading the 255 patches + the extended grays
> > on Hahnemuhle FineArt Pearl. I then opened the 21steps wedge I found
> > in the QTR installation, printed using the PFP profile and read the
> > patches; here you go my readings:
> > 
> 
> I've never seen this type of red bias in PFP2 profiles. Where did
that 1.5 to 
> 2 points of red come from? The same device read the patches to build
the 
> profile as read the patches afterwards. If it had seen neutrals as
red the first 
> time, it would have neutralized them in the profile building. I've
profiled 
> numerous papers this way, and not seen this effect. Is the QTR
target a neutral 
> RGB file? What settings did you use in printing it, and what profile
was tagged 
> to it when it was printed?
> 
> C. David Tobie
> Product Technology Manager
> ColorVision Business Division
> DataColor Inc.
> CDTobie@...
> www.colorvision.com
> 

No idea why this red bias. The QTR target is a Greyscale 8 bit file,
if you have QTR this file is under 

Programm Files/QuadToneRIP/Eye-One/Step-21-gray.tif

I just opened this file, PS warmed it was in a different color space,
I left it on its color space (don't color manage). Then Print With
Preview, picked the PFP profile I made, I selected Relative
Colorimetric and Black Point Compensation. In the printer driver I
pick Premium Glossy Photo Pager and 2880dpi (that was the setting I
used to print PFP targets). 

Now, how can I neutralize this PFP profile? And, at the same time, how
can I achieve deeper blacks (at least comparable to ones obtained with
the ABW printing mode)?