Digital BW, The Print

> From: djon43
>
> Problem: This sharpness-demanding image (machinery with small details)
> looks unsharp at 8.5X11 using QTR (sepia toned), but  distinctly sharp
> using B-O.
>
> This seems not just contrast: unsharpness is obvious at edges of very
> small type in the image as well as metal details.
>
> I just ran a nozzel cleaning and nozzle check....everything looks perfect.
>
> Question:.....Is QTR's use of multiple pigments inherently unsharp Vs
> B-O's use of only two pigments?

Are you talking about BO with the Epson driver? It only uses one pigment,
the full black.

I would expect that QTR would be sharper, but I haven't tried it on the
2200. If it uses both dark and light black, and comes out fuzzier, it must
be the dithering algorithm. Or perhaps the driver includes some built-in
sharpening (i.e., edge enhancement), while QTR doesn't. You might see if you
can compensate with some unsharp mask up front.

Where I'd expect to see the advantage of light black is of course in the
light parts of the picture. I the dark parts, they're both going to be
spraying dark black dots.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...