QTR-Quadtone RIP

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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