Digital BW, The Print

Jerry,

This only seems to apply to the Piezo driver but Nij pointed this out that
you can get rid of a banding artifact perpendicular to head travel by
changing the resolution sent to the printer. I don't know if it is really a
round number issue or just the fact that some resolutions don't work so well
with the Piezo driver.

I just hit this myself yesterday after telling everyone how band free my
1280's have been. So of course I immediately get perpendicular banding in
Best mode (2880 dpi?) with the Piezo driver. By changing the image size with
out resampling so that the dpi shifted a few units the problem went away.
In "better" mode (1440 dpi) the perpendicular banding was not there but some
light horizontal (direction of head travel) corduroy banding in the lower
3/4 tones showed up. A shift in image size to change the dpi sent to the
driver seems to have cleared it up. I have no explanation why and it is
certainly not a cure for all banding but it is something to add to the bag
of tricks.

Martin Wesley

http://www.borderless-photos.de/guests.html



----- Original Message -----
From: "Jerry Olson" <jerryolson@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Monday, August 12, 2002 2:25 PM
Subject: Re: [Digital BW] Sudden epson 1160 vertical banding w. Piezo/MIS FS
after layoff


> Why should you not use round numbers for DPI? and what numbers caused
> the improvement?
>
> Jerry
>
> andrewjadler wrote:
> >
> > Martin -- Your suggestion about avoiding round-number DPI settings
> > has made a substantial improvement. Thanks SO much!
> >
>
>
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