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Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

Message

Re: QTR: relinearizing an existing curve

2010-04-05 by William

Thank you, Igor, amazing how hard it is to find out this info!

Jon

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "igor_mountain" <igorkarpenko@...> wrote:
>
> Yes, it can, QTR supports both.  
> 
> Igor
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "William" <agiprop@> wrote:
> >
> > Hi,
> > 
> > Can the procedure below be done with a densitometer? So the LINEARIZE="..." data will be in density not LAB?
> > 
> > Jon
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "David Wroblewski" <dawroblewski@> wrote:
> > >
> > > Roy, could you confirm that this is the right procedure for
> > > re-linearizing a curve that already has LINEAR="..." data,
> > > such as the one Carl sent me this afternoon:
> > > 
> > > (1) Edit the .txt file and comment out the existing LINEARIZE="..."
> > > line. Verify CALIBRATION=NO.
> > > 
> > > (2) Process and install the curve with quadprofile/quadcurves
> > > scripts.
> > > 
> > > (3) Print out 21Step.tif using the curve of interest
> > > with Output Mode=Quadtone Rip, *NOT* Quadtone Rip Calibration.
> > > 
> > > (4) Measure the patches and add result to the .txt file as a 
> > > LINEARIZE="..." data, then reprocess and install the result, 
> > > 
> > > (5) Reprint 21Step.tif to make sure you got a sensible result.
> > > 
> > > Thanks,
> > > David
> > >
> >
>

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