[argyllcms] Re: Printer Profiling RGB vs CMYK
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 9 Jul 2018 16:39:56 +1000
Gary . wrote:
I have an HP3200 printer and the total ink set is represented by -d10 in targen.
right. But the native printer inkset isn't terribly relevant unless there is
printing interface that exposes it. i.e. if the only print driver you have
to just exposes an RGB interface, then that's all you have to work with.
I believe I understand CM but it isn't clear
how targen handles these two options regarding ink.
Do you have options though ? What printing interface exposes the native
printer inkset ? Typically this is either a RIP of something like
Gutenprint, and (in my understanding - correct me if I'm wrong) even
Gutenprint fudges the driver by using various tables and settings to
make the printer look like CMYK, rather than exposing the native
inkset to ICC profiles or using an ICC link as a CVMYK to native
My printer's use is only for fine
art photography, and since the monitor is calibrated in RGB it seems -d2 would
I'm not sure why you are talking about your display colorspace and your
They are independent.
However, when I investigate other ICC profiles that were provided by
various companies for the HP3200, I see that internally they are marked as CMK
and a few are RGB profiles.
Interesting. Hard to know how your driver interprets the CMY profiles. What
value corresponds to white in them ?
From this though it seems that your print driver only offers an RGB/CMY 3
emulation, using its own separation tables to the native inkset.
Targen usage summary only explains that -d selects the
colorspace. I'm using Adobe1998 colorspace usually, so does a -d10 offer more
color definition than using only -d2 when generating the target colorspace.
any information on this.
See above. Your use of AdobeRGB is not at all relevant. The whole point of a
profile is to allow a CMM to convert from one colorspace (i.e. AdobeRGB) to
(i.e. your printers colorspace.) An ICC device profile defines each colorspace.
CMM links them on the fly to form a colorspace conversion.
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