QTR-Quadtone RIP

Mike Interesting observation - not sure any of us have done this
comparative, I certainly haven't - usually just work @ 2880.
But will give it a try next time I'm printing a wedge. Mike

On 28 April 2011 17:28, Mike Finley <mike.finley@...> wrote:

>
>
> no-one?
>
> On 27/03/2011 15:10, Mike Finley wrote:
> >
> > I decided to start calibration from scratch on some of the 'glossy'
> > papers I have (Innova Fibre Print White Gloss, Hahnemuhle Photo Rag
> > Baryta, and Permajet Fibre Base Royal). I'm using a PC with Windows XP
> > and QTR 2.7 (with the necessary patch!) Epson Pro 3880 and the standard
> > Ultrachrome K3 VM inks.
> >
> > I ran the first calibration prints using 1440 dpi unidirectional with
> > adaptive hybrid dither (which is what I've usually used for printing
> > with prebuilt curves), and for the first paper I was printing did a
> > second print using 2880 dpi to see if there was any density difference).
> > When I'd done the prints for all three I went back to the first to
> > compare the 1440 and 2880 prints which had time to dry a little.
> >
> > There's no obvious difference at the dark and light ends of the scale,
> > but there is in the middle - for the 2880 dpi print for each ink there
> > was very little visible difference between the 45 and 50 patches. On the
> > darker inks there's little visible difference anyway, as the inks are
> > reaching their maximum density by then, but the lighter inks continued
> > ton crease in density from the 55 patch onwards. The 1440 dpi print
> > behaved as one would expect on the prints both before and after this one
> > - there is a gradual progression 45-50-55 with each being distinct. I
> > then made a 2880 dpi calibration print for the Permajet paper, and this
> > too showed the same problem, so it appears to be a general problem
> > printing at 2880 dpi rather than a wierd paper glitch.
> >
> > has anyone else seen a similar problem with 2880 dpi?
> >
> > --
> > mike finley photography
> > http://www.mikefinley.co.uk
> >
> > _
>
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