Digital BW, The Print

Hi Paul thank you for your reply
I use Epson hot press natural on a Epson R1400 with eboni BO 
Qtr software 
Greetings
Mig

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul" <roark.paul@...> wrote:
>
> "mig2012photo" <michielmegens@> wrote:
> >
> >  I try to linearize with a Color Munki some of Paul Roark's excellent profiles  but I got the message after running the installer: Invalid linearize curve -- not constantly increasing. ...
> 
> 
> Most often that error message is due to the profile hitting its dmax too soon -- before the 100% input point.  Or, the starting curve may be too compressed in the shadows.  QTR requires some minimum difference between the values.
> 
> The normal Adobe RGB and Gray Gamma 2.2 workspaces we use have compressed deep shadow areas.  I prefer my profiles to have some compression there before linearization because it gives the program more actual data as opposed to having it interpolate (guess at) the values.  There are some steep cross-overs going on down there that make getting smooth transitions difficult.  
> 
> First, I'd be sure the dmax is actually being reached at the 100% input point.  Print a calibration mode print or a 21-step with a straight line K 0 to 100 curve.  (I often use these, and they may be in the Zip files.)  
> 
> Second, if the ink limit or boost is set correctly, but the starting, pre-linearization compression is too much, try modifying the curves (if we're talking ICCs) or ink limits (QTR) that control the darkest dilute inks.
> 
> Good luck with the setup.  More information about the exact printer, inks, profiles, paper, and Lab L values might help. 
> 
> Paul
> www.PaulRoark.com
>