Digital BW, The Print

Hello Robert,

  no other findings other than what I mentioned. Since we print only
on uncoated paper, we run all the inks with an ink limit of 50 (except
for 100% black) in order to spray the inks at the smallest available
size. Then, we optimize the dilutions of the lighter grays for a
particular paper.

Daniela



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "robert49brake"
<robert49brake@...> wrote:
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dgattarino"
<dgattarino@> 
> wrote:
> >
> > I am asking this question to all the people using 3MK with QTR,
> > expecially with the 3.5pl Epson printers (like Robert Brake). 
> > 
> > Here is the question.
> > Did you ever compared DMAX obtained from 3MK with that obtained with
> > one black cartridge only (using the same ink, of course)?
> > The rational behind the question is as follow. When you use an ink
> > limit lower or equal to 50 with QTR and more than one ink channel
> > (like you do with 3MK) the head uses the smallest 3.5 pl droplets and
> > it deploys those droplets in many more dots, because of the dithering
> > with thre channels combined. On the other side, when using one channel
> > only, the 100% black is obtained using the largest droplets the
> > printing head is capable of, with the ink being deployed on 1/3 of the
> > points. Therefore, at least in theory, 3MK might be able to induce a
> > larger inkload on the paper and, potentially, a better DMax.
> > Do you 3MK users experience such effect?
> > 
> 
> Hello Daniela, 
> 
> Back when I tried BO printing with a 220 I didn't have a spectro. 
The dMax results I got 
> with 3 and 4 mk on a 220  with PAHP205 were I believe close to what
I get from the UT-
> 3D I normally use in the 220: in the neighborhood of 1.60.  I'm away
from home for a 
> while so can't check it.
> 
> Have you found any more info on how or if QTR takes advantage of the
variable droplet 
> size in the newer printers.  For me it was just a theory but it
might provide some great 
> advantages in different inksets.  Might be a question to ask in the
QTR forum.
>