Digital BW, The Print

Hi all - I have been testing Paul's LLk swap for yellow with
( -3, 20 ) and getting a nice warm-neutral print on Silver Rag that is
almost dead on to what I see on my monitor (without the tone).  So out
of curiosity I printed out a 21 step with those ABW settings and
measured it with a PFP Spectro and ran it though QTR's Create ICC.  I
then loaded that icc and printed with no color controls in the print
properties but the print came whacked towards magenta.  I might be
over training here, but I am not sure what I am doing wrong.  Has
anyone else had success with this?

Also when printing with these ABW coordinates it does not appear that
the LLK (Y) is being used very much.

Cheers, John

>... I have been testing Paul's LLk swap for yellow with
>( -3, 20 ) and getting a nice warm-neutral print on Silver Rag that is
>almost dead on to what I see on my monitor (without the tone). 

> So out of curiosity I printed out a 21 step with those ABW settings and
>measured it with a PFP Spectro and ran it though QTR's Create ICC. I
>then loaded that icc and printed with no color controls in the print
>properties but the print came whacked towards magenta. ...

So, for this you're using a grayscale file and Roy's "Create ICC" (not
"Create ICC-RGB).  So, you're dealing just with grayscale, and the text file
made with the spectro can omit any color information (or have it, but
labeled with -- L (tab) A (tab) B (tab)).


Be sure the right ICC is loaded in the print preview, and be sure the
printer driver properties are exactly as they were when you made the ICC.


>Also when printing with these ABW coordinates it does not appear 
>that the LLK (Y) is being used very much.

It's used just as much as the yellow ink would have been, but it's much
harder to see.  LLK dots on a 2400 are virtually invisible.  Much or the
carbon warmth in a system like this comes from the core LK and LLK.  To get
a better range, I use MIS carbon there, which is warmer than the Epson LK
and LLK (which is about half carbon).

Paul
www.PaulRoark.com

Hi Paul - Yes I used a grey scale (G2.2) 21 step strip, but I dropped
the resulting text file in both the RGB and Grey scale Create ICC exe.
and the Out text file looked the same.  I will run it again through the
grey scale exe. and use that icc.  I believe my mistake was not keeping
the same ABW settings when I printed with the icc.  And yes I too have  
installed MIS LK and LLK per your suggestion in an earlier post.  Thanks
for the quick response.

Cheers, John.

Hello Paul,

>Much or the carbon warmth in a system like this comes from the core LK 
>and LLK.  To get a better range, I use MIS carbon there, which is 
>warmer than the Epson LK and LLK (which is about half carbon).

If I was to begin using MIS LK and LLK, and LLK(Y), and wanted to keep
the same resulting tone as I have with K3 inks, would I not have to
dial in more coolant to compensate?  If this is true, would the result
be any more or less lightfast?  


Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm