Digital BW, The Print

John,

I've done these tests and agree with you. I have seen 2nd pass on EEM 
where the density decreases for the reasons you state.
I have also seen the Epson driver at 720dpi  and Matte Heavyweight (I think)
squeeze out an extra few 0.01's compared to OPM (which runs at 1440). 

If you were to plot the typicall matte paper that's been given
a 26 scale print without ink limits, it would seem to peak somewhere
in the middle (around step 15 or so) and then start to drop as it
hits 26. That's why when profiling in IJC, the first thing you do
is run a test print (automatically generated) that shows you the
limits for each ink, pretty much at a glance. Makes it very fast
and without even the need for a densitometer.



Antonis








--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "johnglodge" 
<john.lodge@s...> wrote:
> Antonis,
> 
> I addition you may want to consider:
> 
> when I tried using enhanced matte on 2200 with Epson ink:
> 
> 1. Printing the QTR greyscale for example and reprinting on top of 
> it to get one two and three pass results. (The object of the 
> multipass greyscale is to see increasing density in the lighter 
> samples while to highest density reduces).
> 
> 2. Or using the ink config/density settings in the Epson driver with 
> a single pass shows the same result. (Initially I thought the Epson 
> driver was doing something odd in regard to the +density settings. 
> It was only recently that I thought to compare with multipass 
> results).
> 
> The ink density increases the blackness to a maximum past which ink 
> sheen lowers the observed density. That is to say with the Epson 
> Matt Black at least; something about the pigment pellets causes the 
> blackness to go though a minimum past which more ink will reduce the 
> apparent density.
> 
> Not exactly sure what I am seeing but it seems to be "pellet sheen".
> 
> If this is so at least for pigment inks maximum density may have to 
> be tuned or calibrated before the densities are measured.
> 
> It is less of an issue with gloss or lustre than for matt.
> 
> ...John