Digital BW, The Print

>. Stylus Pro 9500 to run the 4K+ inkset, and . QTR. 

 

As Jeff suggested, I think getting a good carbon core ramp is the first
thing I'd do.  As such the notes at
http://www.paulroark.com/BW-Info/QTR_2200_4K+_MBW-Carb-w7.pdf should be
useful.  It's a step by step description of what I did. Even though the
printer is different, the process of making the curve should be the same.
Also, I've found the relative ratios of the inks stays reasonably similar
when going from one printer to the next.  I'm using Epson light magenta and
the rest is MIS.  The Epson LM may profile just a little differently than
the MIS LM.  As you can see from the notes, I find the LM and LC in my setup
can use the same curve, just at different limits.  Not also that I'm using
an LC that is a 50% dilution.  If you use full strength LC, the ink limit
would be half of what I am using.  

 

I find that once the curve is set up, to move Lab a right or left, I just
swap LC and LM limits - that is, one up and other down.  Lab b stays rather
stable.  To move up or down the Lab b axis, I add or subtract LC and LM in
"equal" amounts (adjusted for 50% dilution or not, depending on what you're
using).  This gives relatively independent control of the Lab axes.  

 

See the curves and numeric coordinates used for a profile with QTR at
http://www.paulroark.com/BW-Info/QTR_2200_4K+C+cm_MBW-N.pdf, pp. 2 - 3.

 

For my 7500, I use IJC.  So, it's a slightly different workflow (harder to
get the core carbon profiled smoothly).  However, the relative limits may be
useful for you.  Look at http://www.paulroark.com/BW-Info/PM_Split_Tone.pdf,
p. 4.  IJC uses a scale of 1 - 26 for its ink limits.  (IJC also uses a
26-step test strip instead of the 21-step version I've usually used.)

 

Hope this helps.

 

Paul

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

 



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