Digital BW, The Print

The initial dmax of Ilford with the PKN3 jumped to over 2.5.  The others
jumped also.  The shadows are now cool.  The midtones are cool, with C
typically .03 density units above Y.  This makes a great BO ink.  

PKN3 is still mostly carbon, just with blue (and none of that weakling
magenta) added.  

We can now match the cool shadows of the selenium-toned silver prints.  Add
Glop to take care of the bronzing, and I see a new inkset.  MIS is going to
hate me.

Paul
www.PaulRoark.com 

___________________

-----Original Message-----
From: Paul Roark [mailto:paul.roark@...] 
Sent: Thursday, January 13, 2005 9:18 AM
To: DigitalB&WPrint
Subject: [Digital BW] Neutral Photo Black


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/> 

 

 



[Non-text portions of this message have been removed]




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