December 2014 - colorsync-users

Device values from i1 swatch measurements
by Jeremy Hansen 17 Jan '15

17 Jan '15

Hello, all. Anyone aware of an application which will facilitate reflective measurement of a sample, using an Eye-One Pro (ideally, any rev, A-E), and return device values for a chosen ICC profile? It would need to run on the latest Mac OS. Export options (such as Excel, Photoshop) would be nice, but not necessary. This functionality was available in PM ColorPicker and Eye-One Share, neither of which are supported or functional on current Mac platform. Thanks for any suggestions!

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Creating synthetic CMYK profiles?
by Terence Wyse 22 Dec '14

22 Dec '14

While creating custom or synthetic RGB profiles is pretty straightforward, does anyone here know of any tools to create synthetic *CMYK* profiles? I’m looking for something that will allow specifying of CMYK primaries and secondaries and a customizable TRC and then build an ICC profile. The intent here is to build something like a “reference” or simulation profile for digital press and/or inkjet devices. I’ve gone through all the ISO 15339 CRPC profiles but none of them have the kind of gamut boundaries that I’m looking for.. Only tool that I can think of at the moment is the rather antiquated Custom CMYK tool in that’s been in Photoshop for a very long time…I’m not confident it will give me what I need. Regards, Terry Wyse

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Re: Creating synthetic CMYK profiles? (Terence Wyse)
by Mike Strickler 20 Dec '14

20 Dec '14

Terry, I do have a new tool (still in beta, so I can't identify it) that will do this. It helps if we can start with spectral data in order to model the overprints. I tested it with you in mind, and it seems to work quite well. Contact me directly and we can give it a try. Mike > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 19 Dec 2014 14:46:23 -0500 > From: Terence Wyse <wyseconsul(a)mac.com> > To: "'colorsync-users?lists.apple.com' List" > <colorsync-users(a)lists.apple.com> > Subject: Creating synthetic CMYK profiles? > Message-ID: <F8CDC5F1-4060-4980-842E-181C487A2EE1(a)mac.com> > Content-Type: text/plain; charset=utf-8 > > While creating custom or synthetic RGB profiles is pretty straightforward, does anyone here know of any tools to create synthetic *CMYK* profiles? > > I’m looking for something that will allow specifying of CMYK primaries and secondaries and a customizable TRC and then build an ICC profile. > > The intent here is to build something like a “reference” or simulation profile for digital press and/or inkjet devices. > I’ve gone through all the ISO 15339 CRPC profiles but none of them have the kind of gamut boundaries that I’m looking for.. > > Only tool that I can think of at the moment is the rather antiquated Custom CMYK tool in that’s been in Photoshop for a very long time…I’m not confident it will give me what I need. > > Regards, > Terry Wyse > > >

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Re: Images and TAC values
by Ulf Wittenberg 20 Dec '14

20 Dec '14

Hello all, I'd like to offer another script based solution. Asks for your max TAC value and then creates a new bright green channel of the respective areas. Looks like the TAC warning in Acrobat Pro … Download: http://kurz.link/2Sy Regards, Ulf Am 16.12.2014 um 21:00 schrieb colorsync-users-request(a)lists.apple.com: > Von: Todd Shirley <todds(a)urbanstudionyc.com> > Betreff: Aw: Images and TAC values > Datum: 16. Dezember 2014 00:21:18 MEZ > An: "'colorsync-users?lists.apple.com' List" <colorsync-users(a)lists.apple.com> > > > The OP expressed a desire for a plugin or some kind of live warning system but not "a specific Action for Photoshop". I agree with Mike and Martin that such a thing would be useful. FWIW, there is a set of actions out there that I use all the time: > http://www.curvemeister.com/downloads/cmyk_tac/index.htm > > Indeed, these are "clunky", but not as clunky as placing the image in InDesign or saving as a PDF to open in Acrobat. It is kind of weird that this isn't available in Photoshop. Maybe if everyone on the colorsync list piled onto this feature request Adobe would notice:http://feedback.photoshop.com/photoshop_family/topics/cmyk_ink_densi… > > -Todd Shirley > > >> Lots of people want this feature in Photoshop. >> >> This feature is already available in both Acrobat AND IN INDESIGN FFS! so why are Photoshop users left in the stupid position of having to place an image in InDesign just to get a “gamut warning style” TIL preview! >> >> -- >> Martin Orpen -- ============================================= Appel Grafik Berlin Reichenberger Straße 124 Haus B / Aufgang 5 D-10999 Berlin Tel.: +49 30/6 90 04 58-11 Mobil: +49 171/6 54 26 48 Skype: uwitberg Appel Grafik Berlin ist ein Geschäftsbereich der Appel Grafik Hamburg GmbH & Co. KG Geschäftsführer: Markus Lenz Amtgericht Hamburg - HRA 92980 ulf.wittenberg(a)appel-group.de http://www.appel-grafik.de =============================================

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Creating synthetic CMYK profiles? (Terence Wyse)
by Niall Coady 20 Dec '14

20 Dec '14

Hi Terry. Been a long time (-; Besides creating a table of values by hand, god forbid spectral values (-; In order to create a truly custom CMYK profile you will need a suitable dataset to start the process. These could be standard datasets where for instance you would like to alter the Dot Gain target, end points, paper white point etc... To achieve this change I would recommend . http://www.crossxcolor.com/#!colorant-overview/c20bv Colorant is an extremely powerful tool for correcting and adapting datasets to achieve smooth printed results and even corrects bad readings in the data. My description does not do the product enough justice so please contact them directly for more information. For the record ColorLogic in Europe is a huge brand backed up by the best quality profile/device link technology I have ever used professionally. I would always highly recommend them. IF you use their Copra product to build your profiles and or Device Links you will have the added ability to adapt rendering intent calculations to add Chroma while maintaining tonal integrity. Their EDIT function allows you to edit a conversion in Photoshop using adaption layers. This needs exploration, I don't want to type for 30 mins on the iPhone but editing a device link conversion in Photoshop is simply genius. I hope this helps you out. Merry Christmas from London! Niall Coady MyPressXpert.com Sent from my iPhone > On 19 Dec 2014, at 20:00, colorsync-users-request(a)lists.apple.com wrote: > > Creating synthetic CMYK profiles? (Terence Wyse)

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Re: Colorsync-users Digest, Vol 11, Issue 167
by Louis Dery 19 Dec '14

19 Dec '14

Hi Terry, I think there is a way to do so. Can you send me the color data (LAB) you would like to create this synthetic CMYK profile and I will send you back the profile and workflow. Regards, Louis Dery louisdery at videotron.ca > On 2014-12-19, at 15:00, colorsync-users-request(a)lists.apple.com wrote: > > Message: 1 > Date: Fri, 19 Dec 2014 14:46:23 -0500 > From: Terence Wyse <wyseconsul(a)mac.com <mailto:wyseconsul@mac.com>> > To: "'colorsync-users?lists.apple.com <http://lists.apple.com/>' List" > <colorsync-users(a)lists.apple.com <mailto:colorsync-users@lists.apple.com>> > Subject: Creating synthetic CMYK profiles? > Message-ID: <F8CDC5F1-4060-4980-842E-181C487A2EE1(a)mac.com <mailto:F8CDC5F1-4060-4980-842E-181C487A2EE1@mac.com>> > Content-Type: text/plain; charset=utf-8 > > While creating custom or synthetic RGB profiles is pretty straightforward, does anyone here know of any tools to create synthetic *CMYK* profiles? > > I’m looking for something that will allow specifying of CMYK primaries and secondaries and a customizable TRC and then build an ICC profile. > > The intent here is to build something like a “reference” or simulation profile for digital press and/or inkjet devices. > I’ve gone through all the ISO 15339 CRPC profiles but none of them have the kind of gamut boundaries that I’m looking for.. > > Only tool that I can think of at the moment is the rather antiquated Custom CMYK tool in that’s been in Photoshop for a very long time…I’m not confident it will give me what I need. > > Regards, > Terry Wyse

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Re: Colorsync-users Digest, Vol 11, Issue 167
by Don Hutcheson 19 Dec '14

19 Dec '14

Terry, The best bet is a hack in Excel of an existing profile. If you want a profile that simulates real-world printing, the challenge is to simulate overprints and trapping with any accuracy. For that you need a good grasp of hinted Neugebauer, but it's never the same as working from actual printed characterization data. If all you want is something that shows gamut boundary, not an actual spring profile, the Excel hack is relatively easy. Don ........................................................ Don Hutcheson, President HutchColor, LLC Washington, NJ 07882, USA office: (908) 689 7403 cell: (908) 500 0341 ........................................................ On Dec 19, 2014, at 15:00 , colorsync-users-request(a)lists.apple.com wrote: > Send Colorsync-users mailing list submissions to > colorsync-users(a)lists.apple.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.apple.com/mailman/listinfo/colorsync-users > or, via email, send a message with subject or body 'help' to > colorsync-users-request(a)lists.apple.com > > You can reach the person managing the list at > colorsync-users-owner(a)lists.apple.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Colorsync-users digest..." > > > Today's Topics: > > 1. Creating synthetic CMYK profiles? (Terence Wyse) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 19 Dec 2014 14:46:23 -0500 > From: Terence Wyse <wyseconsul(a)mac.com> > To: "'colorsync-users?lists.apple.com' List" > <colorsync-users(a)lists.apple.com> > Subject: Creating synthetic CMYK profiles? > Message-ID: <F8CDC5F1-4060-4980-842E-181C487A2EE1(a)mac.com> > Content-Type: text/plain; charset=utf-8 > > While creating custom or synthetic RGB profiles is pretty straightforward, does anyone here know of any tools to create synthetic *CMYK* profiles? > > I’m looking for something that will allow specifying of CMYK primaries and secondaries and a customizable TRC and then build an ICC profile. > > The intent here is to build something like a “reference” or simulation profile for digital press and/or inkjet devices. > I’ve gone through all the ISO 15339 CRPC profiles but none of them have the kind of gamut boundaries that I’m looking for.. > > Only tool that I can think of at the moment is the rather antiquated Custom CMYK tool in that’s been in Photoshop for a very long time…I’m not confident it will give me what I need. > > Regards, > Terry Wyse > > > > > ------------------------------ > > _______________________________________________ > Colorsync-users mailing list > Colorsync-users(a)lists.apple.com > https://lists.apple.com/mailman/listinfo/colorsync-users > > End of Colorsync-users Digest, Vol 11, Issue 167 > ************************************************

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Another color puzzle
by Peter Harris 16 Dec '14

16 Dec '14

Perhaps not the kind of puzzle you were thinking of, this is a 1,000 piece jigsaw of the CMYK color gamut. No kidding! http://puzzle.lamingtondrive.com Too late for Xmas, alas, as the first edition is sold out. Peter Harris Programmer/Analyst Staff Research Associate Baskin Visual Arts Studios University of California Santa Cruz Santa Cruz, CA 95064 831.459.3107 831.459.1028

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Images and TAC values
by Mike Stewart 15 Dec '14

15 Dec '14

Does anyone know of a Photoshop plugin that can display TAC warnings as you are working on an image. I'm not talking about the Info palette or a specific Action for Photoshop. I want to be warned that I am going over the TAC limits set by the Output ICC Profile I am using as I am manipulating the image. Something similar to the Gamut warning maybe. Thanks - Mike Stewart

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Re: Soft-proofing discrepancy (?) [was: Softproof puzzle]
by Peter Miles 09 Dec '14

09 Dec '14

Hi Martin and Matthew No, I don't think it's 8 bit issue or a dithering issue or black point compensation. I did the following test 1: I created a new document - Adobe RGB1998, 2000x500 pixels, 16 bit, In photoshopCC 2: Filled the document with a gray ramp, with no dithering, black to white, from from one end to other. 2: Duplicated the document 3: Converted the Duplicated document to Gray Gamma 2.2 4: Soft-proofed both Gray ramps : Hahnemuhle308 profile (profiled as cmyk), RelCol, BPC = on, Simulate paper white = on Result: RGB gray ramp show posterizing in shadows. Gray Gamma 2.2 Gray Ramp shows smooth shadow transition Viewing on EizoCC241 Monitor And... While I see the banding in the soft-proof of the RGB file, the banding disappears when I actually do a Profile To Profile conversion into the printer colorspace. Further, the soft-proof* of the converted file now matches the soft-proof of the Gray Gamma 2.2 gray ramp file. *[Hahnemuhle308, Rel Col, BPC = on, Simulate paper white = on] Regards Peter Miles

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