Digital BW, The Print

Steve,

I suspect they will produce a PKN - I assume my PKN3 version.

By the way, modern printers don't need the UT-FSN-Y light ink.  In fact the
UT-FSN-M is even too light.  The middle-gray position UT-FSN I mixed for my
7500 is about right, being about the same density as the UT2 and UT7 light
inks.

In addition to the light inks just wasting jets in a printer, they tend to
flood glossy papers, making them rougher instead of smoother.  Also, I found
with the 7500 that closing the C to M density gap eliminated some persistent
micro-banding.  I set the density of the new 7500 medium density gray
empirically.  I tested a range of densities and balanced the dots at both
ends of the range and the microbanding until I found what seemed to be the
low point overall.  Perhaps not by coincidence, that density was very close
to what turned out to be the best on the 1280 and 2200.

Paul
www.PaulRoark.com 


-----Original Message-----
From: Steve Kale [mailto:stevekale@btinternet.com] 
Sent: Friday, January 21, 2005 6:06 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Neutral Photo Black


Any thoughts on MIS putting this in production?  I am running MIS PK
(ESC7600-4-PK) with QTR and (a) FSN C, FSN M and FSN Y for neutral prints
and (b) UT 2 M and UT 2 LM for warm prints, glop in the LK slot and all
prints on EPSG.  I can't get next day dMax to exceed 1.90 for either curve.
Here are the readings from my neutral curve after a short blast with the
hair dryer:

 Step    L   a   b 
  05  90.8   -0.3     -2.9
  10  86.3   -0.1     -2.3
  15  82.0    0.1     ­1.5
  20  77.6    0.3     ­1.0
  25  73.4    0.5     ­0.8
  30  69.5    0.7     ­0.7
  35  65.3    1.0     ­0.9
  40  61.3    1.2     ­1.1
  45  55.8    1.4     ­1.4
  50  52.8    1.8     ­1.6
  55  48.4    2.1     ­1.7
  60  44.1    2.3     ­1.9
  65  39.9    2.5     ­2.2
  70  35.5    2.6     ­2.4
  75  31.4    2.7     ­2.6
  80  27.1    2.8     ­2.7
  85  23.2    2.8     ­2.7
  90  18.0    2.4     ­1.9
  95  14.5    2.3     ­1.3
  100 09.8   0.3     ­0.6
 
  With BO I get a 100 step reading of L=10.1, a=0.2, b=-0.5.

The curves limit inks to 90% and overlap the PK with the "dark grey" by 10%.
I am going to cross check with an Epson PK cartridge.

Steve



> From: Paul Roark <paul.roark@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Thu, 13 Jan 2005 10:46:04 -0800
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: RE: [Digital BW] Neutral Photo Black
> 
> 
> 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.





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