Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla
<E.Dinkla@c...> wrote:
> I think you need a true BO curve implanted in QTR that will use 
> the black channel only to get BO printing from the Qimage-QTR 
> workflow. One way or another (greyscale-RGB input, (K separation 
> is unlikely in QTR)) as long as QTR uses the curves for all the 
> UC channels it will translate any greyscale or RGB image to all 
> the channels.
> 
> Giving Qimage simple greyscale files to start with may make it 
> easier to find what is wrong in the workflow, that Qimage still 
> makes RGB files in "print to file" is already a problem.
> 
> On lighter prints with Qimage-QTR: Could it be that the RGB print 
> to file output of Qimage still gets an extra Lab perceptual 
> greyscale curve treatment despite ICM being shut off ?  Or does 
> QTR something similar with any RGB grey file dropped at it ? 
> That can be checked with files from other sources.  On my Wasatch 
> SoftRip the lightness setting of 25% corresponds approx. with the 
> Lab value so that change in one file with PS may reveal whether 
> it is that percentage lighter.
> Related to this: AdobeRGB tagging.  If converted to sRGB with 1.8 
> gamma, a tagged file and one untagged, what are the results then 
> through the Qimage-QTR route ?

Ernst

Thanks for this reply, but I may have misled you a little.  I am not
trying BO through QTR.  And QTR is working just fine using the full UC
ink set.

My problem with light prints is when trying to print BO using the
Epson driver, with the driver set to "Black" rather than "Colour". 

As mentioned in my other posts, I seem to have tracked the problem to
the Epson driver printing only the black plate.

F_P