RE: Epson 7600-Profile as RGB or CMYK?
RE: Epson 7600-Profile as RGB or CMYK?
- Subject: RE: Epson 7600-Profile as RGB or CMYK?
- From: "Steve Lawrence" <email@hidden>
- Date: Tue, 4 Nov 2003 18:31:35 -0000
- Thread-topic: Epson 7600-Profile as RGB or CMYK?
Chris McFarling wrote:
>
Should the Epson 7600, or any Epson printer for that matter,
>
be treated as an RGB or a CMYK device when profiling it?
>
(Assuming that printing is done via the Epson print driver
>
and not a 3rd party RIP)
>
>
>From what I can gather, the common way is to treat it as an
>
RGB device.
>
>The
>
reasoning there is due to the fact that the driver expects
>
RGB data as input. However, that doesn9t make total sense to
>
me because what comes out of the printer is CMYK. Since the
>
whole point of profiling a printer is to determine the gamut
>
that it can actually produce, it would seem to me that it
>
makes more sense to profile the device as CMYK.
If you are talking about OS level non-postscript (PS) printer drivers
you should profile as RGB. The reason is that the OS limits the driver
from receiving anything other than RGB colour data. The driver then
internally does the conversion from RGB to output colour space (e.g.
CMY, CMYK and CMYK+photo ink) and passes the data to the printer.
If you try to profile as CMYK, when you print the CMYK test chart from
your application, the CMYK data will be converted to RGB before it is
passed to the printer driver anyway. Sending CMYK only introduces
unnecessary additional conversions, that you are unlikely to have much
control of. So it's best to profile and send print data as RGB. You can
get excellent results from RGB profiles.
Trust me on that ;)
Regards,
Steve
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