Re: ColorSync and printing -- Panther (2 of 2)
Re: ColorSync and printing -- Panther (2 of 2)
- Subject: Re: ColorSync and printing -- Panther (2 of 2)
- From: neil snape <email@hidden>
- Date: Mon, 22 Dec 2003 12:13:00 +0100
on 19/12/2003 3:32, John Zimmerer wrote :
>
12) "What about printing a target that I want to measure, in order to
>
create a custom ICC profile for my printer?" As you know, ColorSync is
>
always on in the printing system. That doesn't mean you can't get
>
unmatched device data to your printer. You need to force a "null match"
>
-- in other words, the source color space must be the same as the
>
destination color space. What you need to do is tag your target file
>
with the same profile that you register for your printer. It doesn't
>
matter what the profile is, really -- you just want ColorSync to see
>
that source=destination. ColorSync is smart enough to realize there's
>
no point in matching color that is already in the destination color
>
space. Now, keep in mind the warning from above -- make sure the driver
>
will actually USE the registered "Current Profile". Panther ships with
>
a number of CUPS-based drivers. If nothing else, you can create a new
>
print queue just for profiling your printer. Select the corresponding
>
GIMP-Print driver for your printer; assign a "Current Profile" using
>
the Colorsync Utility; tag your target file with the same profile (you
>
can use the "Embed chosen profile" script in
>
/Library/Scripts/ColorSync/), and make sure to select "Standard" in the
>
ColorSync PDE. Then print, measure, create your profile, and assign
>
this new profile as the "Current Profile", as above.
It's starting to become clear now, yet I still have questions about the
current and registered profiles.
On a certain HP printer (IP) and Postscript rip, the Mode "CMYK" is correct
but why does the Factory Profile claim Name: unknown or remote profile.
What does this mean and how do you set a current profile for a null
transform?
I really thought we had made a lot of progress into bringing simplicity to
using Colorsync in the last few years. I really hope that the book you're
writing will help dispel the the confusion brought about in the latest
upgrades. The technology is as exciting as ever, and the Colorsync team have
brought even more to the table. Please don't forget about the people that
actually have to try to implement this with the application of the current
crop of profilers and instrumentation. There have been so many questions
about people seeing different results in and on different Mac Os's recently.
Now we can see why that can occur, and how to work correctly inside of those
terms. We can also see how all but the most informed and insistent users
will be steered to using defaults by submission. Meanwhile with your help
and help of the others on this list hopefully we can all find some
resolution to current confusing state of the Colorsync interface.
Neil Snape nsnape @ noos.fr neil_snape @ mac.com
http://mapage.noos.fr/nsnape
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