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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Re: [Digital BW] Make a print adjustment curve directly from luminosity data?
2013-06-07 by mccarvill
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