[Openicc] GoSoC 2011: CPD and Color Management

Robert Krawitz rlk at alum.mit.edu
Wed May 4 17:09:19 PDT 2011

On Wed, 4 May 2011 13:07:19 -0600, Chris Murphy wrote:
> On May 3, 2011, at 3:57 AM, Richard Hughes wrote:
>> Don't get me wrong, I think it makes a lot of sense to have a
>> super-dialog for people printing on modified hardware on 42" canvas
>> with 9 custom inks. But we can't design a general purpose architecture
>> to be compatible with that, and also for a regular user just wanting
>> to print his tax return without being bamboozled with gobbledygook.
> Depends on context. If I want to print my taxes on 42" canvas with 9
> custom inks, the general purpose printing architecture should print
> that document, by default, with black only ink, just like any other
> device. And if I print a pretty picture, it should know to use the
> perceptual intent, also by default.

Not so obvious, actually.  There are some RGB (dyesub) and CMY-only
printers (the Epson C80 is a CMYK printer, but the black ink cannot be
used on glossy paper), and there are other printers whose "black" ink
isn't.  The Epson 2100, for example, has a "black" ink that's actually
a medium brown, which needs to have a fair amount of cyan ink added to
achieve a decent black.  And even the current UltraChrome photo black
ink isn't very dark (the matte black ink is, but it's not compatible
with glossy paper), so it's necessary to add some CMY to get a solid

Robert Krawitz                                     <rlk at alum.mit.edu>

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom  --  http://ProgFree.org
Project lead for Gutenprint   --    http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton

More information about the openicc mailing list