QTR-Quadtone RIP

There is a Kayenta profile in the 1800-3MK folder of QTR.  See if the curve
end points are what you're using.  The dmax I got (17.44 - read after drying
with a hair drier, but not left overnight) is shown in the linearization
tab.  I suggest looking at the curve end points because the math to get
there might be a little confusing.  In retrospect, I could have made it a
lot easier, but it just sort of evolved.

 

Paul

www.PaulRoark.com <http://www.paulroark.com/>  

 

 

  _____  

From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
Behalf Of colingruk
Sent: Monday, December 10, 2007 7:45 AM
To: QuadtoneRIP@yahoogroups.com
Subject: [QuadtoneRIP] Building qidf for Kayenta with PK neutral on Epson
1800

 



Awhile ago I was able to modify Paul Roark's HPR qidf files using the
sliders to get good linearization. Since then I have switched the GL
position to the Y with generous help from Carl Schofield and put
new\inks in a bulk feedsystem. The curves no longer work.

I therefore tried to start afresh with the 3MK-Dmax_test and 3MK-start
files.

Using amy Pulse Elite I get an Lmin reading of 17.41 (Dmax of 1.72)
on step 18,, or 85 per cent. The best Lmin I can get before
linearization has been about 20! I have tried raising the 100% limits
in the curves and lowering them, but cannot get the blacks that I had
with the 3MK-Dmax_test file.

With the "linearized curves" I get from `show curve', the highlights
are dark as are the darks but the centre part of the plot is light. 
What do I need to do to bring these to a linear plot?

Colin

-- 
Before photography, I looked - now, I see.

www.colinconwayphotography.com

 



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