Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Olivier" <odesmais@...> wrote:
...> 
> The real issue here is that when I re-load the paper I can see the 
> damage : lots of rubber roll marks on the inked patches. I can let it 
> dry longer but there's still marks looking like waves if I look 
> carefully.
> Might be I put down too much ink, but the output is fine and less ink 
> reduces Dmax.

Olivier, I'm not experiencing this problem. How long are you letting them dry after 1st ink 
go-down? What printer?

snipping questions for Paul...

> Fine. Yet in my experience, I don't see any benefit in multiple inks 
> at Dmax with MPS, where I see a big plus is that some lighter inks 
> helps separating shadows and smooth the ramp. Provided you find the 
> right mix which is an other story. Some might have more valuable 
> experience than mine.

I suspect you are using something that lets you control underinking. SP doesn't let me do 
that. Underink is driven out by an ink reaching 100%. So any limiting at the low end leaves 
underink of the adjacent dark gray. I suspect there would indeed be an advantage to C 
under a PK, as CMYK profilers put a lot in there to make "neutral, and it does increase 
dmax.
But I think that is a very different situation than the inks you and I are using.

To address an earlier question you had- yes, in the ink go-down different amounts of GO 
are necessary in different parts of the scale, and that really varies with paper. Total ink 
does as well, often going back and reducing lighter ink limits after the necessary GO winds 
up mottling a bit is necessary...
For example IGFS can take more ink, and requires way more GO in the highlights, Innova 
US (Epson whatever they call it) can take much less, and requires less GO in the highlights 
and more in the deep shadows...

Then I still think it needs a second run through of around 50% GO...
That may all change tomorrow.

Tyler