QTR-Quadtone RIP

I have also printed the file that was made available o9n the
inkjetmall website.  The resulting text is somewhat smaller than the
1pt text I created (also vector text created in a drawing program --
and also had text in different directions: normal, and at 45 and 90
degree angles).  It does appear that producing the file to 1080dpi
resolution seems to make a difference.  It is significantly different
than my initial comparison with a 360 dpi file.  Since as Roy
explained, both QTR and the Epson driver down samples to 720 dpi (I
used the "Fine Detail" setting on the Epson driver which uses 720
dpi), QTR must be doing something differently than the Epson driver.
And I don't think I am going too far out on a limb, based on my sample
print, that it does it better.  The differences are not as huge as
they are in the promotional Piezography sample print, but it is
unquestionably significantly better.  I am surprised, based on what I
saw before.  Certainly from now on, when printing, if I can send a
file to QTR at 1080dpi, I will.  See a scan of my comparison print of
the inkjetmall file here:
http://tech.ph.groups.yahoo.com/group/QuadtoneRIP/photos/view/d000?b=4&m=f&o=0

Is there any reason to believe that QTR won't produce similar results
with different inksets, such as for example, UT7 and UT-3D?  

While a test like this may be of limited value, it does suggest the
level of detail that is potentially attainable in a print.

Out of curiosity, what is the potential for expanding the QTR software
to similarly handle full color printing?


--- In QuadtoneRIP@yahoogroups.com, "Paul Roark" <paul.roark@...> wrote:
>
> Jon Cone wrote, in part:
> 
> >... I posted a 1/2 inch square file ...
> >  if you would like to test it ...
> 
> > Download at http://www.inkjetmall.com/piezoTypetest_tif.zip
> 
> I just tried printing this on an Epson 1400 with QTR and the Epson
driver.
> It's very sharp with either.  The text actually looks a little
larger than
> the "1 point" text I had printed earlier.
> 
> I'm not sure what QTR does with a 1080 dpi file.  I think the Epson
driver
> downsizes it to 720.  That might actually be a source of difference that
> could affect the K3 example.  I've experimented with very high
resolution
> files in the past and noticed that the information thrown out by the
Epson
> driver (I forget what printer model) made the very high resolution file
> print less well than one that was "only" 720.  That is, there may be a
> difference in how the approaches treat very high res files.
> 
> At any rate, while high resolution scans are wonderful, I can't imagine
> anyone wanting to deal with or needing a file in excess of 720 ppi
at the
> print size.  The 20,000 pixel wide panorama file I just printed was
such a
> nuisance to deal with and print at its full resolution that I
downsized to
> 240 ppi for the 51 inch print.
> 
> Paul
> www.PaulRoark.com
>