Re: Networked printer profile in OSX
Re: Networked printer profile in OSX
- Subject: Re: Networked printer profile in OSX
- From: EBI Aktivitet <email@hidden>
- Date: Sat, 27 Sep 2003 00:18:07 +0200
OK... Well, I'm happy you could supply a clear answer to this question, but
I'm not sure I'm as happy with the consequences this implementation of color
management brings with it...
If you don't mind, may I continue a line of thought?
Suppose a users printer has a RIP that9s set up with input queues, having
their own color management setup. Now, the user prints documents from a
variety of applications, both those who generate their own Postscript, and
apps that rely on OSX.
Let's, for the moment, forget about the additional complexities of documents
containing both RGB and CMYK, but instead think of a document containing a
mix of tagged and untagged CMYK images and colors, the profile being the
users offset profile of choice.
If the document is printed from an app that generates its own Postscript,
all should be ok, and the RIP takes over the necessary matching to the
printer.
If the user prints the document from an app relying on OSX, well, we'd be in
trouble, right? The untagged CMYK would be converted using OSX default CMYK
profile as source, and the tagged images would also be converted, but using
the tagged profile as source, ending up in a strange unpredictable mix of so
called color management...
As a second problem it would seem that Jaguar relies on the unlikely
assumption that the printers built in CRD is good, or that a custom CRD has
been downloaded to the printer, prior to print job being sent to the
printer.
I also can't help wondering if only images are sent to the printer as device
independent colors, of if vector graphics and text is sent this way too?
PS. I'm out travelling and haven't checked the list for a while, sorry if I
missed any continuation of this thread that might have touched this
subject...
Regards, Adim Lundin
Den 03-09-19 02.54, skrev "John Zimmerer" <email@hidden>:
>
Adim,
>
>
> Thanks John!
>
>
No problem. You're welcome.
>
>
> But... Are you telling me that every printed Postscript job on OS X is
>
> sent
>
> to the printer as device independent color?!
>
>
Almost every job. Apps that generate their own PostScript handle their
>
own color management. Their PostScript just gets passed through the
>
printing system, virtually untouched.
>
>
> Questions:
>
>
>
> 1. Can I disable this behavior? How else print a test chart for
>
> measuring an
>
> ICC-profile, just as an example of when I would like to disable
>
> Postscript
>
> color management...
>
>
There is no way to "disable" this on Jaguar (or earlier). You could
>
print from an application that generates its own PostScript, like
>
Photoshop, and do the color management therein. On Panther, you can
>
assign a non-RGB profile (Gray or CMYK) as the printer profile, then
>
tag the source color data with this profile.
>
>
> 2. Although CSA->CRD color matching actually can work, under extremely
>
> controlled circumstances, it normally creates more trouble than
>
> benefit, at
>
> least that9s my experience. If I would like to register an output
>
> profile
>
> for my Postscript printer (even if this is sent to the printer as a
>
> CRD), is
>
> there any way to do that, or am I stuck in a hard wired workflow?
>
> There are
>
> many printers out here that don9t allow changing CRD's easily...
>
>
Jaguar's behavior cannot be changed. You could print from an app that
>
generates its own PostScript and have the app do the match, or save
>
files as PDF, then print from Reader. Panther will let you choose the
>
output profile and do on-host matching.
>
>
> Regards, Adim Lundin / EBI
>
>
JZ
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