Re: Turn off color management!
Am 04.03.2016 um 01:59 schrieb colorsync-users-request@lists.apple.com:
Message: 7 Date: Fri, 04 Mar 2016 01:16:35 +0100 From: Uli Zappe <uli@ritual.org> To: Martin Orpen <martin@idea-digital.com> Cc: ColorSync <colorsync-users@lists.apple.com> Subject: Re: Turn off color management! Message-ID: <D70CB7E3-87AC-4AC9-82C5-D9EDFE4CCF2E@ritual.org> Content-Type: text/plain; charset="windows-1252"
Anybody running a business that relies on Apple products in their workflows is in a very risky position. No risk no fun. :-)
The risk sounds to me like to talk only with the jailer. Not the kind of social live I prefer.
Maybe you should do another search of the Apple’s Developer Library to see if you can find anything about ColorSync written in our current decade? Why should I do another search?
I have already found all I need. :-)
Some docs I recently used:
https://developer.apple.com/library/mac/technotes/tn2227 (2011, ColorSync & AV Foundation) https://developer.apple.com/library/mac/samplecode/ImageApp (2012, ColorSync & Core Image) https://developer.apple.com/library/mac/samplecode/From_A_View_to_A_Movie (2013, ColorSync & OpenGL) https://developer.apple.com/library/mac/samplecode/convertImage (2013, ColorSync & Accelerate) https://developer.apple.com/library/mac/technotes/tn2313 (2014, ColorSync Best Practices, a technology overview with code examples)
Thanks for sharing. However, what I expect from your previous posts some info about, how to get (and eventually set) the print and monitor device color profiles programatically. As you and some others described here, these profiles would be needed to created a NullTransform on OS X these days. Last time I looked into that topic, all existing API's became deprecated without a public known substitute. Thanks
Am 04.03.2016 um 20:20 schrieb Kai-Uwe Behrmann <ku.b@gmx.de>:
However, what I expect from your previous posts some info about, how to get (and eventually set) the print and monitor device color profiles programatically. As you and some others described here, these profiles would be needed to created a NullTransform on OS X these days.
You certainly need not touch the monitor profile. For the rest, are you talking from a user’s or a software developer’s perspective?
Last time I looked into that topic, all existing API's became deprecated without a public known substitute.
The low level substitute API is publicly known as it is documented in the public headers of the ColorSync framework: /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ColorSync.framework/Headers/ But depending on what exactly you are trying to achieve in your code, you might have no need to go to such a low level. Cocoa classes like NSColor, NSColorSpace, NSBitmapImageRep etc. offer lots of ColorSync related methods that might be sufficient for you. Bye Uli _________________________________________________________________________ Uli Zappe, Christian-Morgenstern-Straße 16, D-65201 Wiesbaden, Germany http://www.ritual.org Fon: +49-700-ULIZAPPE Fax: +49-700-ZAPPEFAX _________________________________________________________________________
Hello everybody This isn’t exactly color management but I’m hoping one of you has experience with this topic. What exactly is the difference between Pantone Process Inks (PANTONE Process Cyan, PANTONE Process Megenta, PANTONE Process Yellow, PANTONE Process Black) and "standard" CMYK process inks? I work with a designer who insists her work should be printed with Pantone Process inks, not "Standard CMYK". She is under the impression that Pantone Process inks will produce a wider gamut or will reporoduce "better" in some way. I have always believed that a CMYK image will look the same with either "kind" of inks because in fact there is no difference. I had actually made this inquiry of Pantone a couple years ago, and they supported my position that there isn't any such thing as "pantone process inks" and that the shading for all CMYK primaries is governed under ISO 2846-1. However, not only does the designer persist in her belief that these are different inks, she has 2 different printers and another vendor who agree with her and insist that printing with "pantone process" produces better results than standard CMYK. One of the printers said they mix their own "pantone process inks." Is this really a thing? Is it perhaps just a higher quality ink? Does anybody know what they are talking about? I had settled this in my mind years ago, but just recently was in a meeting with the above client, vendors and printers and was somewhat angrily rebuffed when I dismissed “pantone process” out of hand. So maybe I’m the crazy one. If so, please correct me! Thanks -Todd Shirley
On Mar 7, 2016, at 12:49 PM, Todd Shirley <todds@urbanstudionyc.com> wrote:
What exactly is the difference between Pantone Process Inks (PANTONE Process Cyan, PANTONE Process Megenta, PANTONE Process Yellow, PANTONE Process Black) and "standard" CMYK process inks?
The great thing about standards is there're so many to pick from. There's nothing stopping a printer from buying "standard" CMYK inks from whatever source with whatever quality controls or specifications or what-not. Using the Pantone trademarks at least opens you up to some liability from Pantone (X-Rite) if you're not meeting their standards. The only real way to answer in a specific case would be to compare spectrometer readings from the inks in question, or to compare profiles built from the different inks. For practical porpoises, if your client's work lies within the color gamut of both, and if your entire process is well controlled and profiled, there won't be any difference. And chances are slim that there'll be anything that lies within the gamut of one CMYK inkset but outside another...and slimmer still that there's enough of a difference for it to actually matter. Anything far enough outside of a CMYK gamut (any CMYK gamut) to be a problem is going to need a different pigment entirely -- whether it be the orange or violet of large format inkjets or a spot (true Pantone) color or hexachrome something even more exotic. Cheers, b&
Your interpretation is correct…Pantone CMYK primaries are governed under ISO 2846-1. http://www.pantone.com/help/?t=CMYK-Primaries-not-found-in-PANTONE-FORMULA-G... On Mon, Mar 7, 2016 at 2:49 PM, Todd Shirley <todds@urbanstudionyc.com> wrote:
Hello everybody
This isn’t exactly color management but I’m hoping one of you has experience with this topic.
What exactly is the difference between Pantone Process Inks (PANTONE Process Cyan, PANTONE Process Megenta, PANTONE Process Yellow, PANTONE Process Black) and "standard" CMYK process inks? I work with a designer who insists her work should be printed with Pantone Process inks, not "Standard CMYK". She is under the impression that Pantone Process inks will produce a wider gamut or will reporoduce "better" in some way. I have always believed that a CMYK image will look the same with either "kind" of inks because in fact there is no difference.
I had actually made this inquiry of Pantone a couple years ago, and they supported my position that there isn't any such thing as "pantone process inks" and that the shading for all CMYK primaries is governed under ISO 2846-1. However, not only does the designer persist in her belief that these are different inks, she has 2 different printers and another vendor who agree with her and insist that printing with "pantone process" produces better results than standard CMYK. One of the printers said they mix their own "pantone process inks." Is this really a thing? Is it perhaps just a higher quality ink? Does anybody know what they are talking about?
I had settled this in my mind years ago, but just recently was in a meeting with the above client, vendors and printers and was somewhat angrily rebuffed when I dismissed “pantone process” out of hand. So maybe I’m the crazy one. If so, please correct me!
Thanks
-Todd Shirley _______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription:
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participants (5)
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Ben Goren
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Kai-Uwe Behrmann
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Michael Eddington
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Todd Shirley
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Uli Zappe