Digital BW, The Print

Terry Ritz <t.ritz@...> wrote:
>
> ...It will be really interesting to see which HP PK /
> MIS glop dilution you end up settling on.

> "Paul" <roark.paul@...> wrote:
> > I've found the 2:1 dilution of HP PK with MIS glop 
> > (33% PK, 67% Glop) ... has a higher dmax than the 100% HP PK, ...


So far, I'm still targeting my 1100 HpGO setup, with the caveat that I'll use HP PK and not MIS PK. (These is nothing at all wrong with MIS PK, it's excellent warm carbon.  However, I want the same neutral-cool glossy pigment type in the printer.)

In the 1100 I have 2 LK-density positions (2 parts glop to 1 part HP PK).  There is also an LLK (33% LK).  So the HP-Glop "Quad" half of the "Dual Quad" setup will be 1 PK, 2 LKs and 1 LLK.  This keeps the setup more consistent with existing, pre-mixed (HP and other) inks.  It gives me 2 LKs to play with and optimize the dmax where appropriate.  The one LLK gives me the totally smooth, dot-free highlights, and the PK allows me to produce a drier 100% black where needed.

With the 1400 I did run into a downside of using more dilute LK to achieve a better dmax.  The wetter blacks are more prone to pizza wheel marks.  

On the 7800 that should not be a problem, but the ability to control the final 100% black net dilution by selecting a blend of Lk and Pk via software (QTR) seems like a more flexible approach than doing it in a fixed ink mix. 

Using relatively standardized ink densities (PK, LK, LLK) is part of a theme of mine.  I want competitive inputs.  You'll notice the "EZ" 1100 uses just an LK and PK -- any you might want to try.  Likewise with the 1400 "Eboni-4 Plus," the 2 additional inks are LK and PK.

Paul
www.PaulRoark.com