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QTR-Quadtone RIP

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RE: QTR 21 Step Wedges not linear?

2014-02-26 by <paulmwhiting@...>

Roy,
What I've run into is that Elements does not offer Luminance (Lab L) under the mode tab, but I did run across something in one of Paul Roark's pdfs, that in the Info Palette you can choose HSB, Paul says it's close enough to Lab L. I'm going to try that.
I've tried scanning a Kodak 21step file, scanning a 21step print in QTR, and then interpolating from the Kodak file to get linear densities for use in the linearization table - but this has been problematic, I can't get enough densities to fill in all 21 blanks. I run short at one end or the other, if that makes sense. Not sure I'm making clear what I mean!
Regards,
Paul

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