Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Nick H. Nugent" <nghin@p...> 
wrote:
> Hi Roy,
> 
> It's good to know you're working on the R printers. 
> Please see my comments below.
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> <roy@h...> wrote:
> > ...
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Nick H.
> Nugent" 
> > <nghin@p...> wrote:
> > > ...
> 
> > The profiles were made for 1440x1440 and you need to
> > use this res to get the 1.5pl drops. 1440super uses
> > more like 3pl drops.
> 
> I'm not sure I understand this. The help file says
> 1440super is "Eight pass printing at 1440 dpi
> (reduces the likelihood of banding)". So you use
> larger droplets to achieve the samething?

Hi Nick,

The idea is that at 1440x1440 you can use 3 dotsizes approx:  (1.5, 3.5, 8) pl.
But at 1440x720 (that's the 1440dpi and 1440super) if you use those small dotsizes
there's no way to get enough ink on the page for a dMax black.   So with 1440x720,
we go with dotsizes approx: (3.5, 8, 15) pl.  This gives enough ink but then it's
like the older printers such as the 2200.

It basically boils down to if you want smaller dots you have to use more of them.

> 
> > > 5. The black-only prints at any dpi on the R1800 is
> > > very smooth. The dots are almost invisible. Toned
> > > prints look even smoother and very pleasing.
> > 
> > Is that using the Epson driver?  I think it uses more
> > inks which helps by more volume of ink but the
> > trouble is is that they are color inks.
> 
> I'm talking about prints I made using the EEM cool
> and sepia profiles in QRT.

I guess I'm confused.  Does QTR and R1800 give acceptable prints or is there
banding?

> 
> > >Sofar my wishlist for the R1800 is ...
> > 
> > >All in the works (except the 5760dpi, I think that's
> > >mostly hype).
> 
> Great. I wonder what Photo RPM mode is in the Epson
> driver. It doesn't even give me any resolution
> selection: Photo, Best Photo, Photo RPM, etc... Maybe
> Photo RPM is not even 5760 like you said. Anyway,
> 2880 in QTR is already very good, just needs to be
> a little faster, or maybe I need a machine with more
> horse power.

As far as I can tell the 5760 is just doing more passes. But the dotsize doesn't get
any smaller than what's used in 1440x1440.  So you'ret going to be putting out
about the same number dots.  Positioning of the dots my vary but I can't imagine
(1/5760) = 0.0002 inch being that much of a difference.

Roy

> 
> > > Overall with the help of QTR the R1800 can really be
> > > an all-in-one printer for both color and b/w works
> > > and of course glossy and matte.
> > 
> > Maybe.
> 
> Well once the R1800 printer is fully supported by QTR
> I really do think I can make all my prints with it.
> Currently the 1160 is still my best printer for making
> b/w prints.
> 
> --nick