Re: was - P700 and P900 full channel support

> It should be possible to support this, other than the violet channel.  We
> could support the violet
> channel for raw printing (i. e. the user has to do the separations), but
> actually supporting the
> violet ink for normal printing would be a fair bit of tuning work and
> would need to be hands-on.  If
> you're interested in doing this, be prepared to put a lot of time and a
> fair bit of consumables into it.
>
> The first thing to do would be to look at src/xml/escp2/inks/cmykrb.xml in
> the Gutenprint source
> tree to see an example of what we did for the R1800 and R800, which is
> CMYK+red+blue (which is
> actually closer to purple, but Epson calls it blue).  The most
> non-standard part of this is the
> <Curves> section, which is a set of transfer curves for each ink channel
> by hue, starting with
> blue=0.  I always tested these by printing a rainbow sweep pattern and
> trying to get as good of a
> match as I could with ordinary CMY(K).
>
> My thought about this is that we should at least at first only support the
> violet ink in raw mode,
> as effectively a spot color.
>

Your description applies to the violett channel?!
Because I'm new to print driver development I'd like to start with
supporting the matte black channel. At least I think it should be easier,
right?
What  would be your advice to start?

Oliver

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