-----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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