Re: Epson Printers/Colorsync/OSX
Re: Epson Printers/Colorsync/OSX
- Subject: Re: Epson Printers/Colorsync/OSX
- From: Chris Murphy <email@hidden>
- Date: Fri, 11 Oct 2002 23:31:30 -0600
On Friday, October 11, 2002, at 07:31 PM,
email@hidden wrote:
There are APIs in ColorSync that allow smart apps to deliberately
bypass OS color management.
I've asked a couple of major app developers about this and it was news
to them and they weren't aware of it being used. Now the following is
pure speculation on my part, but I think the only applications that
need to be explicitly non-color managed are the display
calibration/profiling applications. Whereas it's the printer drivers
that need to make use of the API to turn color management off for
output, and it makes sense they'd use this API always unless the
ColorSync option were selected in the printer driver.
Perhaps early drivers weren't doing this, and perhaps there are some
remaining obscured drivers that still don't do it, but the ones I've
used and tested (1280 and 2200), aren't a problem.
Just don't print it from Preview...
That's probably good advice. It's possible for raster devices that have
a driver capable of expressing the desire to not color manage the
output to the OS would still produce the same results out of Preview.
But for PostScript devices, it looks like every application that does
not generate its own PostScript will cause the OS to include a CSA,
causing in-RIP color management to occur. For RGB content, this would
happen anyway. But for CMYK profile targets, you'll get a Generic CMYK
(based on TR 001 in OS X) CSA included with the job which means the
printer's RIP will do a conversion on that target. Not a good thing in
this case.
Chris
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