[argyllcms] Re: Profile Epson printer: Eye-one Photo LT or Design LT ?

On Tuesday 29 January 2008 05:21:08 Geert Janssens wrote:
> Hi,
>
> I am currently looking around to buy an X-rite Eye-one spectrometer. Based
> on the feedback I got from this list, I have been looking for the Photo LT
> edition.
>
> I noticed there is also a more expensive edition, Design LT. The difference
> seems to be that the Design LT can be used for profiling CYMK printers
> (in "limited mode" whatever that may mean, while the Photo LT would only be
> useable for RGB printers (also in "limited mode"). Is this a limitation of
> the included spectrometer, or just the software bundled with it ? And what
> is meant with this "limited mode" ?
>
> I am asking because I don't know which one I should buy for my printer. My
> Epson Stylus Photo 950 is a 6-color inkjet printer (Cyan, Light-Cyan,
> Magenta, Light-Magenta, Yellow and Black). I would assume then that the
> printer is a CMYK printer.
>
> Also, I believe I read in the Argyll CMS documentation that what really
> matters is the  Driver's color space, whether the driver expects CMYK or
> RGB input. Or did I misunderstand ?

With GutenPrint you can supply either RGB or CMYK images and you probably 
should be profiling your printer as a CMYK device if you are using 
GutenPrint.  Then the CMM will handle the RGB to CMYK transform.

If you are on Windows you would profile the printer as an RGB device.

>
> I am using the Gutenprint drivers on linux for my printer. And I think this
> driver works in the CMYK color space, because I can tweak various cmyk
> density options in the advanced driver settings. But I don't know for sure.
> Anyone else know this ?
>
> One more question here. The Argyll documentation mentions that it can only
> profile three color CMYK, but my printer appears to use five. Does that
> mean I can't profile this printer with Argyll ?

Actually Argyll will handle up to 4 channels currently so for a multi-channel 
printer like yours just profile it as a CMYK device and let the GutenPrint 
driver handle the light/dark channel splitting.

Also CinePaint and and PhotoPrint give you a color managed printing workflow 
using GutenPrint on the back end.  Both will handle either CMYK or RGB 
images.

Hal

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