Digital BW, The Print

These are some of the "next day" readings of the current (version 2) of the
neutral "PKN2."  All of these were printed with a 1280. In addition to the
dmax, I note the BO 50% CMY and Lab (a, b) readings (after application of a
curve to linearize the output).  The BO prints tend to be slightly cool in
the highlights, neutral at 50%, and reach their warmest point at about 75%
to 85%.  The Lab a (red-green axis) stays relatively the same.  The Lab b
(yellow-blue) is what varies.  So, I note the "warmest" (highest) Lab b
value in the shadows, since getting rid of the warm crossovers in the
shadows is one of my goals.  

 

Kirkland MIS PK = 2.14, PKN2 = 2.29, BO 50% CMY all = .61, Lab (a, b) =
(.17, -.49), warmest b = .99;

 

Premium Semigloss MIS PK = 2.06, PKN2 = 2.18, BO 50% CMY all = .61, (-.02,
.54), warmest b = 1.08;

 

Ilford Smooth Pearl (I have no good MIS PK comparison),

                   PKN2 100% = 2.31, 50%  = .60 all, Lab (a, b) = (.39,
-.31), warmest b = 1.24;

 

PSM MIS PK = 1.96, PKN2 = 2.03, BO 50% CMY = .60, .59, .59, (.15, -.61),
warmest b = -.2

 

 

There will be another PKNx today that will be cooler.  I'm curious to see if
the dmax can go higher, how cool the inkset needs to be to get totally rid
of the warmth in the deep shadows, and whether a cooler version makes for
better BO prints on popular glossy papers.  I tend to think glossy prints
look better if they are a bit on the cool side.  Also, if the PKN were
cooler, people could always buy bulk and mix it with MIS PK to achieve the
degree of coolness or warmth they prefer.

 

 

Paul

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

 

 



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