Re: PostScript output Half Toned not dithered

On 26 Jan 2006 Chris Evans <chris@xxxxxxxxxxxxxxx> wrote:
> I am having a strange problem here, I was doing a printout from Ovation to
> the excellent Samsung CLP550 when I noticed that our demo photo (jpeg) was
> a lot darker than normal, I could also see from the grey scalling demo that
> it was being half toned and not dithered.
>
> I can't see anywhere to select dithering in the PostScript driver or
> Ovation!

Postscript generally uses half toning, its bitmap based printers that support
error diffused dithering.

> Moving to different versions of RISC OS and/or !Printers sometimes is
> correcting things but I can't see a repeatable pattern.
>
> Any ideas?

Are you sure none of the setups is using the a PCL5 compatible driver, which
will support dithering?

---druck

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