Digital BW, The Print

>> ...I wonder if we experience this more than Paul cause we are on Macs
>> and he's on a PC. ...
> 
> We have run into a Mac-PC difference for the 1280.  I wonder if the 1160 is
> also affected.  Could you send me some test strips for the curves on EAM?

Anything you need! What's your pleasure, 21 step wedge? Lets just get clear
on what you need first, in terms of workflow and all. For instance I printed
the same image using sRGB and Adobe RGB, and went with Adobe because it gave
me a better screen match (brighter print) than sRGB. I start in Grayscale
gamma 2.2 like you, then Adobe RGB, then the same driver settings as you but
since the file is tagged Adobe, that is the source space (PS6). My monitor
is Spyder calibrated to D65K g2.2. So should I keep my current settings, or
use sRGB for our tests? What else?

So, if our prints match and you get a good screen to print match than it's
something in my monitor calibration, but if our prints differ it's something
in my workflow? Just wondering how you interpret the tests.

 
>> ...the blacks with the MIS inks seem to start out warmer (redder?)
>> than the Piezo, until the inks dry.
> 
> They should be the same.  I just did a raw scan of a Piezo test strip (Piezo
> driver) and an MIS variable-tone test strip.  The 100% black PS Histogram
> tool RGB readings are as follows:
> 
> Piezo black -- 10.3/7.8/5.8
> 
> MIS VM black -- 5.2/1.8/1.7
> 
> (The luminance difference is due to the lighter Piezo driver blacks, not the
> inks.)
> 
> The red minus blue values (that is the "warmth") of the inks are relatively
> close.  In my testing, the two inks seem so close that I think they probably
> are the same ink.

Hmm, as I told Jerry, they look less warm to me today, but...

It appeared more red when using a cool curve. It may just be the way the
toner is dispersed across the tones relative to the VP3 setup. Do you think
the toner ink mixes with the blacks at about the same percentage points
(points along the grayscale that is) as the VP3?

Also, reading your numbers above (forget luminance), MIS  Black's Red is
quite a bit higher by percentage than B & G, relative to the Piezo black no?
Doesn't that demonstrate a redder ink?

I'm just talking theory at this point BTW. I'm not making any more judgement
calls till I get more prints under the bridge.

Thanks,
Todd
 
> Paul Roark
> 1424 Aarhus Dr.
> Solvang, CA 93463
> 
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