Hi.
I am using and Epson 4880 and an Epson 7900 and I am not having the same
problem that you describe.
I am using and i1Pro spectro (without UV filter).
Here is my "parameter list" for Hahnemuhle Bamboo and Epson 7900:
targen -v -d2 -G -f2232 -g128 name
printtarg -v -ii1 -t360 -p310x450 name
chartread -v -H -B -T0.4 name
colprof -v -qu -i D50 -o 1931_2 -S AdobeRGB1998.icc -cmt -dpp -f -D
A-E7900-Bamboo-2880dpi-i1Pro name
I suggest you to try to increase the number of patches and to try to use
-S AdobeRGB1998.icc in colprof.
About OBA compensation; you can read here (maybe you already did):
http://www.argyllcms.com/doc/FWA.html
Using only -f in colprof means that your prints will be viewed with a
D50 ligh soruce.
For a better behaviour you should use
http://www.argyllcms.com/doc/illumread.html.
Let me know.
Vittorio Villani
> Date: Mon, 4 Apr 2011 11:25:58 +0200
> From: stefan@xxxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> CC: 1007140@xxxxxxxx
> Subject: [argyllcms] Re: Purple-Blue shift problem with Epson printer
>
> Hi,
> i tryed now a differend paper (even one without FWA) and differend
> printer (9800 and 11880). And the purple shift in blue is always the
> same compared with standard printerdriver settings and commercial CMM.
>
> All over Argyll CMM hit the colors very well but for this shift in blue
> i would give Argyll a "no go" :(
>
> The workflow is only RGB (not CMYK!) from Photoshop with Epson printer
> Driver. This should be a very common workflow and i wonder nobody
> getting in trouble with this before.
> May it is just me or i use wrong parameter creating the profile?
>
> targen -v -d2 -f441 eps_test
> printtarg -v -ii1 -pA4 -t 180 eps_test
> chartread -v -c1 -H eps_test
> colprof -v -D"eps_test-argyll-srgb" -qh -S sRGB.icc -cmt -dpp eps_test
>
> thanks for feedback :)
>
> best,
> Stefan
>
> Am 02.04.2011 00:17, schrieb Elena [service address]:
> > Hello Ernst
> >
> > On 1-Apr-2011, Ernst Dinkla wrote:
> >> Couldn't it be just the mismatch of an FBA effect of the paper and a
> >> profile not precisely compensated/adapted for it ?
> >>
> >> The fluorescent brightening effect in papers is much more varied than
> >> the compensations used suggest.
> >
> > Other than using -f I don't know what one could do - unless tweaking
> > with observer parameters, spectrum, etc. But it's my feeling that it's
> > a more subtle matter (not so big, of course).
> > A more or less common CMYK process will never allow a saturated RGB
blue,
> > so the resulting closest match is a de-saturated blue [unless using
> > saturation intent, maybe ?] And a de-saturated blue in my
experience always
> > tends to look more purplish than just light blue to the eye. This
also happens
> > on monitor with RGB: I often find useful, when creating light
blues, to add a
> > little amount of green to compensate for this purplish effect. So
maybe it's
> > just my eye, or a common and complex psycho-visual effect.
> >
> > /&
> >
> >
> >
>
