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Digital BW, The Print

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Re: [Digital BW] Make a print adjustment curve directly from luminosity data?

2013-06-07 by mccarvill

What I ended up doing was:

- Converting the luminosity values to K values by subtracting from 100
- Creating an adjustment curve where I substituted the `ideal' values for the actual ones (e.g. 85 becomes 77).

The ideal values came from Jon Cone's spreadsheet available here - http://www.piezography.com/PiezoPress/blog/piezography-k7-inks-and-curves/checking-your-linearization/

I just sent this corrected file to the print studio. I'll measure the corrected test strip and see how close I got.

Mark   
www.highparkphotography.ca 


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Paul Roark <roark.paul@...> wrote:
>
> I don't know or an easy way to take the linearization data and make a PS
> curve.  (I think that is what you're thinking of.)
> 
> Paul
> www.PaulRoark.com
> 
> 
> 
> On Fri, Jun 7, 2013 at 6:30 AM, mccarvill <mccarvill@...> wrote:
> 
> > **
> >
> >
> > Thanks, Paul. I've done that, but I was thinking more about making a curve
> > (like print transfer curves in older versions of Photoshop) to alter the
> > file based on the linearization data. I can do it manually but I thought
> > maybe there was a way to just import the data somehow and do it
> > automatically.
> >
> > M
> >
> >
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Paul Roark
> > <roark.paul@> wrote:
> > >
> > > Drop it into QTR's Create ICC-RGB and use the resulting ICC to soft proof
> > > the files.
> > >
> > > (I assume they are using ABW, which is not color managed. Hopefully they
> > > at least use consistent settings, which is a problem I had with a service
> > > bureau -- must be consistent).
> > >
> > > Paul
> > > www.PaulRoark.com
> > >
> > > On Thu, Jun 6, 2013 at 10:22 AM, mccarvill <mccarvill@> wrote:
> > >
> > > > **
> >
> > > >
> > > >
> > > > I'm exploring working with a print studio that doesn't linearize their
> > > > Epson 9900 (yes, really) and I'd like to try calibrating my image file
> > to
> > > > their printer. (Why work with them at all? Great price and quality,
> > other
> > > > than the lack of linearization, and I haven't found any better
> > alternatives
> > > > for large format printing).
> > > >
> > > > I've measured with my PrintFix Pro a 21-step test strip printed on
> > their
> > > > 9900 and want to use the luminosity data to make an adjustment curve to
> > > > correct for their printer. While I can use the data to eyeball how
> > much to
> > > > lighten my image (their printer prints too dark, significantly so in
> > the
> > > > shadows), my question is whether it's somehow possible to input the
> > > > luminosity data directly into Photoshop to achieve something more
> > accurate.
> > > >
> > > > Mark
> > > >
> > > >
> > > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>

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