Digital BW, The Print

Greg wrote:
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
> <tyler@...> wrote:
>> not heresy at all. Doing it here, but keeping the quad machine alive
>> and well too.
>> How about making that CMY in your setup just the light inks? Of course
>> you have no choice with the Y, but still...
>> A small gamut CMY would be even better, I still think it's those high
>> saturation dots, no matter how spares, that are a problem.
>> Tyler
>>
>>
> 
> Yes that's what I was thinking, the light colors, or maybe even
> diluted light colors should work very well. And if you had 5 black
> inks, you should be able to get all (or more) of the tonality that the
> quads use. Or use a double 4 black ink set so that you had both photo
> and matte black installed. Actually for matte paper I would still run
> all 5 blacks, but gloss would be only 4.
> 
> And depending on the light inks used, you can still get a decent sized
> gamut if you use them at full mixture. I tried making a 4 color
> comparison once with the cmYK and CMYK, the plots were different but
> the over all volume was fairly similar. I wouldn't suggest trying to
> pass this off as a full color printer, but for the occasional B/W with
> some selective color it should have been OK.

There will always be a compromise whether one uses the CMY or 
the cmY hues of a CcMmYK. The inkloads of cmY only inks in 
color printing and to cool down a greyscale print are 
problematic + the fading will be higher. CMY inks on the other 
hand show too much dot in the highlights. Given the choice I 
would use CMY inks and MK, PK, k,k,k.

It is typical that the R1800 has CM inks that are not as 
strongly pigmented as the CM inks of the CcMmYK UC inksets 
(according to Robert Krawitz). A compromise between less 
visible highlight dots and acceptable saturation at full 100%. 
So instead of CM or cm one could find the compromise in a 
blend in between for a good B&W printer with some 4 color 
capability.

In quads: on cooling warm K inks I think Paul Roark made the 
right decision to use Blue ink. Less ink needed than with a CM 
or cm mix (less bleeding), better fade resistance than with a 
CM/cm mix. Hard to get that with CM/cm inks.

Ernst
-- 

                    --
           Ernst Dinkla


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