Re: Color cast when printing
Re: Color cast when printing
- Subject: Re: Color cast when printing
- From: Daniel Salazar <email@hidden>
- Date: Tue, 23 Dec 2008 06:59:22 +0100
Roger
This tells me that when the printer is managing color and the
pictures are
perfect, the printer driver is carrying the correct color
conversion, from,
say, sRGB or your custom monitor profile to your Spyder3Print printer
profile. You need ti discover, exactly, which chain of conversions,
which
profiles are being concatenated, by the print driver. So that you
can turn
around and do the same in Aperture or PSE when Aperture or PSE
manage the
colors.
I've found that when PSE lets the printer to manage the colors, then
ColorSync is deactivated and is "vendor matching".
In Aperture and PSE when these applications are managing the color are
set as "ColorSync", therefore I guess that here ColorSync is doing
something weird.
It is important to mention that previous to decide that the printer
is
managing the colors, on the ColorSync Utility I changed the profile
to
the printer under devices.
Boy! Is there a way you could afford to *not* use color conversions
happening at system level? Not that I don't trust ColorSync workflow
but, if
I was you, I would want to manage the color conversions myself, that
way I
have a chance of following what is going on.
I just uninstalled my printer, repaired permissions and then
reinstalled again. Now everything is as it would be new and the color
conversion is not happening anymore at system level..... however the
problem is still happening. I do not know why ColorSync is
Daniel, could you experiment with color converting your files, in TIFF
perhaps, completely outside either Aperture or PSE? I was thinking
using
the ColorSync utility or through some ColorSync scripts (do these
still
exist in OSX I'll admit that's been a while since I had to hunt or use
them). But color converting in the ColorSync environment will give
you the
definitive answer.
I just exported from Aperture the same picture with snow. One using a
sRGB profile, another using the profile I created and the last one
using the profile delivered with the printer (same paper type as the
one I created). I print the one created with an sRGB profile and using
preview I printed twice, one setting ColorSync to manage the color and
the other one letting the printer do it. The result is that the one
printed letting the printer manage the color doesn't have any cast and
the snow color is snow color and not yellow as the one printed letting
ColorSync managing the colors. So, now I suppose that ColorSync is
giving this color cast, however I do not know why? it is supposed to
match all the different profiles in order to preserve the same color.
Any idea?
Just curious, did you disable any color management in Aperture or
PSE when
you first printed Spyder3Print testcharts?
Just a crazy thought ...
Ye, I think so, I selected "application managed colors" when printing
them using Spyder3Print, that means - to me- that Spyder3Print is
managing the colors.
Many thanks
Daniel
On 21.12.2008, at 21:08, Roger Breton wrote:
Daniel,
Your situation is not easy to tell from a distance.
I got a Spyder3Print and already profiled some paper I have.
Spyder3Print? Maybe C.D.Tobie could help as I'm not up to speed on
this
ColorVision product :(
I decided to try then with a picture of my son laying on the snow. I
proof the profile on screen and looked perfect, however when I try to
print the picture, then choosing the profile (Aperture is managing
the
color) on the ColorSync Profile list I saw that the picture on the
preview acquired a yellow color cast.
I am not familiar with Aperture but the color shift maybe a sign that
Aperture does not color manage the Preview? Much the same way
Photoshop
pre-CS3 did not.
I also did the same trying with Photoshop Elements and happened the
same.
Again, it's possible that both applications just pass the preview
image to
the system unmanaged.
Just when I try on PSE and the printer is managing the color, the
pictures is perfect.
This tells me that when the printer is managing color and the
pictures are
perfect, the printer driver is carrying the correct color
conversion, from,
say, sRGB or your custom monitor profile to your Spyder3Print printer
profile. You need ti discover, exactly, which chain of conversions,
which
profiles are being concatenated, by the print driver. So that you
can turn
around and do the same in Aperture or PSE when Aperture or PSE
manage the
colors.
In Aperture the results when the printer is
managing the colors is similar as when Aperture manage them.
Which is encouraging because that's the behavior you want, in a way.
Which
does not seem the case when you do the same in PSE.
It is important to mention that previous to decide that the printer
is
managing the colors, on the ColorSync Utility I changed the profile
to
the printer under devices.
Boy! Is there a way you could afford to *not* use color conversions
happening at system level? Not that I don't trust ColorSync workflow
but, if
I was you, I would want to manage the color conversions myself, that
way I
have a chance of following what is going on.
I really do not know what is happening, at the begging I though it
was
the paper, I though that the paper distributed here in Switzerland by
HP would have some variations to the one they used when creating the
profile, now when I created my own profiles I really do not know.
Daniel, could you experiment with color converting your files, in TIFF
perhaps, completely outside either Aperture or PSE? I was thinking
using
the ColorSync utility or through some ColorSync scripts (do these
still
exist in OSX I'll admit that's been a while since I had to hunt or use
them). But color converting in the ColorSync environment will give
you the
definitive answer.
Another route you could take is download a free CMS utility like
Argyll
(www.argyllcms.com) and execute the profile conversions at the
command line?
That may prove challenging at first but you would not, once and for
all,
without the shadow of a doubt, what to expect from your Spyder3Print
printer
profiles. Then you could use Argyll's output to benchmark Aperture
or PSE.
Just curious, did you disable any color management in Aperture or
PSE when
you first printed Spyder3Print testcharts?
Just a crazy thought ...
MfG / Roger
__________ Information from ESET Smart Security, version of virus
signature
database 3709 (20081220) __________
The message was checked by ESET Smart Security.
http://www.eset.com
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden