Digital BW, The Print

Each printer is a little different.   The relationship is based on this:
> > The thing to realize in all cases is that the smallest size  
> > determines the dottiness in
> > the highlights, the largest size times the resolution must be  
> > enough to provide enough ink for dMax.  
For the R800/R1800 you need 2880 or 1440x1440 to get the 1.5pl drop.
At 1440x720 you need a bigger big dot and that goes with a bigger small dot.

The R260 is special in that a 1.5 drop is available with a bigger big dot so it
can still be used at 1440x720.  You always pick the set of 3 based on the big
dot and resolution -- then what size small dot is whatever comes with it.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield <list@...> 
wrote:
>
> Roy,
> 
> Thanks for clarifying the dot sizes question.  Is it also necessary  
> to use the highest print resolution to ensure that the smallest dot  
> sizes will be used or is there no relationship between resolution and  
> dot sizes?
> 
> Carl
> 
> On May 29, 2007, at 12:11 AM, Roy Harrington wrote:
> 
> >
> > I've got an R260 that I've started playing with -- I expect the  
> > 1400 is pretty similar.
> > The Epson's touting of 5 drop sizes is a bit of marketing hype  
> > IMO.  It's still a 3 dropsizes
> > at a time printer just like all the other recent printers.   The  
> > difference is that they
> > have more choices in what 3 sizes can be used but you must still  
> > pick the set of 3
> > before any printing.
> >
> > The thing to realize in all cases is that the smallest size  
> > determines the dottiness in
> > the highlights, the largest size times the resolution must be  
> > enough to provide
> > enough ink for dMax.  The old printers always gave you 3 sizes that  
> > were consecutive
> > like 1,2,3 or 2,3,4 the R260 has 1,2,3 or 1,2,4 or 1,3,5 or  
> > 2,3,5.   Does all this make
> > a difference?  It's hard to tell.  I expect low res, fast printing  
> > may benefit but for the
> > best high res printing it's probably a toss up.
> >
> > I think one of the advantages of Paul's multi-eboni approach is  
> > that he can keep the
> > ink limits of the individual channels low enough to stay in the  
> > small dot range but
> > still get to dMax because he has multiple channels firing.
> >
> > Roy
> >
> >
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield  
> > <list@> wrote:
> >>
> >> Paul,
> >>
> >> Do you know what the dot size distribution is across the tonal scale
> >> for these "1.5 pl" printers?  Epson describes the new printers, not
> >> as 1.5 pl printers, but rather Dx5 variable drop size.  I'd assume
> >> that the smallest drop size (1.5pl) is used only in the highlights,
> >> but I don't really know that.  Here is Epson's blurb:
> >> "With DX5 (droplets x 5 sizes), each nozzle has advanced capabilities
> >> to discern and adjust the ink droplet size based on the needs of your
> >> print job."
> >>
> >> Can you look at a 21 step printed grayscale and actually see
> >> different drop sizes on the print?  Could also be resolution
> >> dependent where smallest drop sizes are only used at highest printing
> >> resolution.
> >>
> >> Carl
> >>
> >> On May 28, 2007, at 3:24 PM, Paul Roark wrote:
> >>
> >>> Hi Myron,
> >>>
> >>>> For purely B&W printing using 3rd party B&W inks,
> >>>> is there any advantage to the Epson 1800 over the 1400?
> >>>
> >>> I'm waiting for my 260 to arrive.  I'll let people know as soon as
> >>> I can get
> >>> it running with my new approach.  Hopefully, I'll have the multi-
> >>> channel
> >>> Eboni approach running in that under $100 printer soon.
> >>>
> >>>> Both have 1.5 picolitre jets, and both will handle 13" paper.
> >>>> The 1800 has eight heads, while the 1400 has six, but this
> >>>> should not be an issue with B&W.
> >>>
> >>> Yes, 3 channels appears to be all that are needed.
> >>>
> >>>> Will QTR work with the 1400?
> >>>
> >>> I expect QTR support is not too far off.  Also, I think I can set
> >>> up an
> >>> Epson driver workflow with the 260/1400.
> >>>
> >>>> Aside from that, is there any reason I
> >>>> should not save the $150-$200 and get the 1400?
> >>>
> >>> The relative build quality and paper handling will be issues I'll
> >>> be looking
> >>> at.  One the one hand the 1400 is a second generation 1.5 pl
> >>> machine, so
> >>> Epson may actually have learned a few lessons that will allow it to
> >>> improve
> >>> the printing.  On the other hand, it's cheaper.  Some of the cheaper
> >>> printers show it.
> >>>
> >>> Paul
> >>> www.PaulRoark.com
> >>
>