June 2022 - colorsync-users

[WANTED] Research/Innovation in Electronic Imaging *Deadline Approaching*
by Roberta Morehouse 22 Jun '22

22 Jun '22

Electronic Imaging Symposium (EI 2023) January 15-19, 2023 Downtown, San Francisco https://bit.ly/EI2023 EI 2023 CALL FOR PAPERS IS NOW OPEN! https://bit.ly/EI2023_Submissions The Electronic Imaging Symposium offers a unique opportunity for researchers and makers from industry, government, and academia to explore the broad range of subjects that comprise the field through short courses and technical sessions. Classes and talks range from practical, real-world applications to the fundamental science and technology that underlie them. There is no other place that offers you such breadth, depth, and camaraderie in one event. DISCIPLINES *Human Perception, Artistic Visualization, and Cognition for Emerging Technologies *Real-time Image and Video *Image Capture Systems *Image Reproduction and Material Appearance *Document Processing and Media Security *Image and Video Modeling, Processing, Quality, and Systems *Virtual and Augmented Reality, 3D, and Stereoscopic Systems *Web and Mobile Imaging and Visualization EXPLORE THE 17 EI CONFERENCES > > https://bit.ly/EI2023_Conferences SUBMISSION OPTIONS > > https://bit.ly/EI2023_SubmissionOptions 1. IF YOU WANT A JOURNAL CITATION >> Select the Journal-first Option Accepted papers submitted to the Journal of Imaging Science and Technology (JIST) or Journal of Perceptual Imaging (JPI) will be cited as a journal manuscript, presented as oral papers during the Symposium, and published as reprints in the conference proceedings. **DEADLINE: 1 JULY 2022** 1. IF YOU WANT A CONFERENCE PAPER CITATION >>Select the Proceedings Paper Option Accepted papers appear in the Conference Proceedings volume - review the call for papers for the conference of interest. **PRIORITY SUBMISSION DEADLINE: 15 JULY 2022** 1. PRESENTATION-ONLY OPTION Presentation-only submissions are often by invitation or permission of the conference but are also suitable especially for industry contributors restricted from submitting proceedings papers. *This option allows you to present a talk at a conference without submitting a proceedings paper for publication. **PRIORITY SUBMISSION DEADLINE: 15 JULY 2022** ***Regular Submission Deadline: 15 AUGUST 2022*** Authors who submit after the Priority Submission Deadline are notified as conference programs are finalized during Fall 2022. HOW TO SUBMIT TO EI 2023 >> https://bit.ly/EI2023_Submissions Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T) -imaging across applications- imaging.org <http://www.imaging.org/> IS&T is a non-profit organization dedicated to advancing science and technology in imaging. Please consider donating<https://www.imaging.org/site/IST/About_Us/Donations/IST/About/Donations.asp…> today. Connect with us on LinkedIn<https://www.linkedin.com/company/society-for-imaging-science-and-technology…> and Twitter @ImagingOrg<https://twitter.com/ImagingOrg>

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[London Imaging Meeting] In-person Registration Closes 22 June!
by Roberta Morehouse 21 Jun '22

21 Jun '22

London Imaging Meeting 2022 - Display Science 6-8 July 2022 Institute of Physics (IOP), London UK *In-person registration closes on 22 JUNE https://bit.ly/LIM2022 Join us in London for a full day of display science courses-LIM 2022 Summer School-followed by two exciting days of technical talks and networking opportunities. LIM Summer School is ONLY available in person, whereas participants have the option to attend the Technical program online or in person. The Post-LIM 2022 Networking Event + Demos at the University of Cambridge is complimentary. ************************************************************************************* 6 JULY: LIM 2022 Summer School https://bit.ly/LIM2022_SummerSchool TALKS * THE REALITY OF AUGMENTED REALITY DISPLAY AND OPTICS - Karl Guttag, Ravn * OPTIMIZING HOLOGRAMS FOR STANDARD HOLOGRAPHIC DISPLAYS - Kaan Akşit<https://kaanaksit.com/about/>, University College London * COLOUR PERCEPTION - Sophie Wuerger<https://pcwww.liv.ac.uk/~sophiew/>, University of Liverpool * GAMUT MAPPING & HIGH DYNAMIC RANGE - Javier Vazquez Corral<http://www.jvazquez-corral.net/>, Universitat Autònoma de Barcelona 7-8 JULY: LIM Technical Program KEYNOTES * Foundations of Perception Engineering, Steven M. LaValle<https://ieeexplore.ieee.org/author/37280522300>, Center for Ubiquitous Computing, University of Oulu (Finland) * The Display of Perception and the Perception of Displays, Robert Pepperell<https://www.cardiffmet.ac.uk/artanddesign/staff/Pages/robertpepperell.aspx>, Fovotec Ltd/Cardiff Metropolitan University (UK) TOPICS * PERCEPTUAL METRICS AND OPTIMIZATION * PERCEPTUAL AND AUTOMOTIVE DISPLAYS * DISPLAYS AND HDR * HOLOGRAPHIC, TENSOR, AND WIDE COLOUR GAMUT DISPLAYS * VR/AR AND VOLUMETRIC CONTENT * COLOUR 9 JULY: Post-LIM 2022 Networking Event + demos in Cambridge * Visit the University of Cambridge after LIM 2022. Network and view demos of some of the HDR and 3D display prototypes + other work done in the Graphics and Displays group headed by Prof. Rafal Mantiuk. Among other things, see the 3D HDR hyper-realistic display.<https://www.cl.cam.ac.uk/research/rainbow/projects/hdrmfs/> Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T) -imaging across applications- imaging.org <http://www.imaging.org/> Connect with us on LinkedIn<https://www.linkedin.com/company/society-for-imaging-science-and-technology…> and Twitter @ImagingOrg<https://twitter.com/ImagingOrg>

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Spot Colors | Alternate Color Space behaviour | PDF export
by Mike Strickler 09 Jun '22

09 Jun '22

Marc is correct, and I’ll add more. Downsteam applications such as RIPs and color servers normally (or at least should) ignore the Alternate Color Space and search for the spot color by name in its internal libraries and apply the Lab value. The Alternate Color Space exists as a fail-safe to defer to when color information for the spot color can't be found by that application, assuming its color settings allow for such a substitution. It is better that they don’t, of course, but just in case: In Illustrator enter the spot color’s Lab values (correct ones not Adobe’s) so as the Alternate Color Space so the result will still be correct. By the way, if a “Book” color is added to the swatch palette and it is a solid spot color (not process equivalent) Lab values should be automatically filled in as the Alternate Color color. They will be wrong because Adobe’s libraries are, but at least the color will look something like that specified in Pantone’s libraries and won’t be clipped to the CMYK press gamut. Good luck, Mike > On Jun 9, 2022, at 10:03 AM, colorsync-users-request(a)lists.apple.com wrote: > > Today's Topics: > > 1. Spot Colors | Alternate Color Space behaviour | PDF export. > (Axel Robert) > 2. Re: Spot Colors | Alternate Color Space behaviour | PDF > export. (Jon Meyer) > 3. Re: Spot Colors | Alternate Color Space behaviour | PDF > export. (Axel Robert) > 4. Re: Spot Colors | Alternate Color Space behaviour | PDF > export. (typhoon correctcolor.org) > 5. Re: Spot Colors | Alternate Color Space behaviour | PDF > export. (Axel Robert) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 9 Jun 2022 14:03:34 +0000 > From: Axel Robert <axel.robert(a)ubisoft.com> > To: "colorsync-users(a)lists.apple.com" > <colorsync-users(a)lists.apple.com> > Subject: Spot Colors | Alternate Color Space behaviour | PDF export. > Message-ID: <EE772B4C-D403-4519-9407-9B41DBDC70D9(a)contoso.com> > Content-Type: text/plain; charset="utf-8" > > Good afternoon. > > I was wondering if somebody else already experienced and solved this problem, as well. > > We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It?s almost a late binding workflow before sending the final PDF to our printers. > > So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. > > So far, we did have any issue, but we recently received a document with a Spot Color template in it. > And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). > > We tried to find why without any success. > But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. > > The PDF export has no color conversion except an OI and OC for the PDF itself. > And despite all the color swatches we use, the result is equal. > The only difference lies when we use a PDF Export Preset which converts colors to the destination. > In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. > > How is it possible? > Would you have any idea? > > Thanks! > Axel > > UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality > Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. > I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or > follow up on this email outside your working hours. > > > > ------------------------------ > > Message: 2 > Date: Thu, 9 Jun 2022 11:01:52 -0400 > From: Jon Meyer <jonmeyer(a)grafixgear.com> > To: Axel Robert <axel.robert(a)ubisoft.com> > Cc: "colorsync-users(a)lists.apple.com" > <colorsync-users(a)lists.apple.com> > Subject: Re: Spot Colors | Alternate Color Space behaviour | PDF > export. > Message-ID: <95374687-8660-4672-A044-225B03485A99(a)grafixgear.com> > Content-Type: text/plain; charset=utf-8 > > Hello Axel - > The only correct way to describe spot color is in L*a*b* values. This is supported in Illustrator. > > I would not waste time with attempting to rig another workflow (unless your RIP is not L*a*b* compliant - in which case one must reduce expectations to just pleasing color). > > Jon > >> On Jun 9, 2022, at 10:03 AM, Axel Robert via colorsync-users <colorsync-users(a)lists.apple.com> wrote: >> >> Good afternoon. >> >> I was wondering if somebody else already experienced and solved this problem, as well. >> >> We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It?s almost a late binding workflow before sending the final PDF to our printers. >> >> So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. >> >> So far, we did have any issue, but we recently received a document with a Spot Color template in it. >> And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). >> >> We tried to find why without any success. >> But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. >> >> The PDF export has no color conversion except an OI and OC for the PDF itself. >> And despite all the color swatches we use, the result is equal. >> The only difference lies when we use a PDF Export Preset which converts colors to the destination. >> In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. >> >> How is it possible? >> Would you have any idea? >> >> Thanks! >> Axel >> >> UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality >> Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. >> I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or >> follow up on this email outside your working hours. >> >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> colorsync-users mailing list (colorsync-users(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/colorsync-users/jonmeyer%40grafixge… >> >> This email sent to jonmeyer(a)grafixgear.com > > > > ------------------------------ > > Message: 3 > Date: Thu, 9 Jun 2022 15:25:22 +0000 > From: Axel Robert <axel.robert(a)ubisoft.com> > To: Jon Meyer <jonmeyer(a)grafixgear.com> > Cc: "colorsync-users(a)lists.apple.com" > <colorsync-users(a)lists.apple.com> > Subject: Re: Spot Colors | Alternate Color Space behaviour | PDF > export. > Message-ID: <89385690-664F-4377-AC61-4099B2D8512A(a)ubisoft.com> > Content-Type: text/plain; charset="utf-8" > > Hello Jon. > This transformation unfortunately occurs in the Adobe export process itself before doing any ripping action afterwards. > I know that Spot Colors shall be describe in Lab (even if some former Adobe Pantone swatches are still in CMYK). > But the problem arises in the process from the source file to final PDF export, so far. > That's why I don't understand this behavior, so far. > > Sincerely. > Axel > > ?On 09/06/2022 17:02, "Jon Meyer" <jonmeyer(a)grafixgear.com> wrote: > > [You don't often get email from jonmeyer(a)grafixgear.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > Hello Axel - > The only correct way to describe spot color is in L*a*b* values. This is supported in Illustrator. > > I would not waste time with attempting to rig another workflow (unless your RIP is not L*a*b* compliant - in which case one must reduce expectations to just pleasing color). > > Jon > >> On Jun 9, 2022, at 10:03 AM, Axel Robert via colorsync-users <colorsync-users(a)lists.apple.com> wrote: >> >> Good afternoon. >> >> I was wondering if somebody else already experienced and solved this problem, as well. >> >> We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It?s almost a late binding workflow before sending the final PDF to our printers. >> >> So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. >> >> So far, we did have any issue, but we recently received a document with a Spot Color template in it. >> And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). >> >> We tried to find why without any success. >> But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. >> >> The PDF export has no color conversion except an OI and OC for the PDF itself. >> And despite all the color swatches we use, the result is equal. >> The only difference lies when we use a PDF Export Preset which converts colors to the destination. >> In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. >> >> How is it possible? >> Would you have any idea? >> >> Thanks! >> Axel >> >> UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality >> Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. >> I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or >> follow up on this email outside your working hours. >> >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> colorsync-users mailing list (colorsync-users(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.app… >> >> This email sent to jonmeyer(a)grafixgear.com > > > > ------------------------------ > > Message: 4 > Date: Thu, 9 Jun 2022 16:28:14 +0000 > From: typhoon correctcolor.org <typhoon(a)correctcolor.org> > To: Axel Robert <axel.robert(a)ubisoft.com> > Cc: Jon Meyer <jonmeyer(a)grafixgear.com>, > "colorsync-users(a)lists.apple.com" <colorsync-users(a)lists.apple.com> > Subject: Re: Spot Colors | Alternate Color Space behaviour | PDF > export. > Message-ID: <827BD460-C299-4310-B331-D410FCFCA3C5(a)correctcolor.org> > Content-Type: text/plain; charset="utf-8" > > Axel, > > Actually, the way you describe spot colors in Illustrator should be irrelevant. If printing to a traditional press, then a spot color should be an actual ?spot? color, and a separate plate, and as long as it is, and you ink up that fountain with the right ink, it works. > > If printing to digital, the ?spot? color is a L*a*b* value, but in the RIP, and that L*a*b* value in the RIP corresponds to the spot color name. The name is all that matters in the file. The name in the file must correspond exactly to the name in the RIP that is associated with the L*a*b* value that spot color should represent. If it?s a true spot color, the RIP will disregard any color information in the file and attempt to print that L*a*b* value, provided it recognizes the name, meaning that the name is in its spot color library, and that library is turned on. > > Somewhere in your conversion, there?s always a ?convert spots to process? option. That needs to be disabled. > > If your spots are coming through with any color information other than that they are spot colors, that would be the first place to look. > > > > Mike Adams > Correct Color > > On Jun 9, 2022, at 10:25 AM, Axel Robert via colorsync-users <colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>> wrote: > > Hello Jon. > This transformation unfortunately occurs in the Adobe export process itself before doing any ripping action afterwards. > I know that Spot Colors shall be describe in Lab (even if some former Adobe Pantone swatches are still in CMYK). > But the problem arises in the process from the source file to final PDF export, so far. > That's why I don't understand this behavior, so far. > > Sincerely. > Axel > > ?On 09/06/2022 17:02, "Jon Meyer" <jonmeyer(a)grafixgear.com<mailto:jonmeyer@grafixgear.com>> wrote: > > [You don't often get email from jonmeyer(a)grafixgear.com<mailto:jonmeyer@grafixgear.com>. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > Hello Axel - > The only correct way to describe spot color is in L*a*b* values. This is supported in Illustrator. > > I would not waste time with attempting to rig another workflow (unless your RIP is not L*a*b* compliant - in which case one must reduce expectations to just pleasing color). > > Jon > > On Jun 9, 2022, at 10:03 AM, Axel Robert via colorsync-users <colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>> wrote: > > Good afternoon. > > I was wondering if somebody else already experienced and solved this problem, as well. > > We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It?s almost a late binding workflow before sending the final PDF to our printers. > > So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. > > So far, we did have any issue, but we recently received a document with a Spot Color template in it. > And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). > > We tried to find why without any success. > But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. > > The PDF export has no color conversion except an OI and OC for the PDF itself. > And despite all the color swatches we use, the result is equal. > The only difference lies when we use a PDF Export Preset which converts colors to the destination. > In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. > > How is it possible? > Would you have any idea? > > Thanks! > Axel > > UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality > Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. > I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or > follow up on this email outside your working hours. > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > colorsync-users mailing list (colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>) > Help/Unsubscribe/Update your Subscription: > https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.app… > > This email sent to jonmeyer(a)grafixgear.com > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > colorsync-users mailing list (colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/colorsync-users/typhoon%40correctco… > > This email sent to typhoon(a)correctcolor.org > > > ------------------------------ > > Message: 5 > Date: Thu, 9 Jun 2022 17:03:04 +0000 > From: Axel Robert <axel.robert(a)ubisoft.com> > To: typhoon correctcolor.org <typhoon(a)correctcolor.org> > Cc: Jon Meyer <jonmeyer(a)grafixgear.com>, > "colorsync-users(a)lists.apple.com" <colorsync-users(a)lists.apple.com> > Subject: Re: Spot Colors | Alternate Color Space behaviour | PDF > export. > Message-ID: <F6EAE73C-9FC8-42FD-9054-5816096F6269(a)ubisoft.com> > Content-Type: text/plain; charset="utf-8" > > Hello Mike. > Nice to meet you. > > Thank you for your explanations. > But I?m wondering if I finally did not explain my issue in a wrong way. ? > > Because it?s not a RIP or DFE matter. > The problem occurs at the beginning of the stage in the PDF itself. > The Spot Color should be known with an Alternate Color Space in CMYK or Lab. > And in such a manner, the result would be to read Lab or CMYK in it, right? > However, The Alternate Color Space is tagged as ICC profile which is obviously odd. > > So, my question is more about what happens during the export from the native file before any further transformations in a prepress workflow. ?? > > Best. > Axel > > From: "typhoon correctcolor.org" <typhoon(a)correctcolor.org> > Date: Thursday 9 June 2022 at 18:28 > To: Axel ROBERT <axel.robert(a)ubisoft.com> > Cc: Jon Meyer <jonmeyer(a)grafixgear.com>, "colorsync-users(a)lists.apple.com" <colorsync-users(a)lists.apple.com> > Subject: Re: Spot Colors | Alternate Color Space behaviour | PDF export. > > You don't often get email from typhoon(a)correctcolor.org. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> > Axel, > > Actually, the way you describe spot colors in Illustrator should be irrelevant. If printing to a traditional press, then a spot color should be an actual ?spot? color, and a separate plate, and as long as it is, and you ink up that fountain with the right ink, it works. > > If printing to digital, the ?spot? color is a L*a*b* value, but in the RIP, and that L*a*b* value in the RIP corresponds to the spot color name. The name is all that matters in the file. The name in the file must correspond exactly to the name in the RIP that is associated with the L*a*b* value that spot color should represent. If it?s a true spot color, the RIP will disregard any color information in the file and attempt to print that L*a*b* value, provided it recognizes the name, meaning that the name is in its spot color library, and that library is turned on. > > Somewhere in your conversion, there?s always a ?convert spots to process? option. That needs to be disabled. > > If your spots are coming through with any color information other than that they are spot colors, that would be the first place to look. > > > > Mike Adams > Correct Color > > > On Jun 9, 2022, at 10:25 AM, Axel Robert via colorsync-users <colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>> wrote: > > Hello Jon. > This transformation unfortunately occurs in the Adobe export process itself before doing any ripping action afterwards. > I know that Spot Colors shall be describe in Lab (even if some former Adobe Pantone swatches are still in CMYK). > But the problem arises in the process from the source file to final PDF export, so far. > That's why I don't understand this behavior, so far. > > Sincerely. > Axel > > On 09/06/2022 17:02, "Jon Meyer" <jonmeyer(a)grafixgear.com<mailto:jonmeyer@grafixgear.com>> wrote: > > [You don't often get email from jonmeyer(a)grafixgear.com<mailto:jonmeyer@grafixgear.com>. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > Hello Axel - > The only correct way to describe spot color is in L*a*b* values. This is supported in Illustrator. > > I would not waste time with attempting to rig another workflow (unless your RIP is not L*a*b* compliant - in which case one must reduce expectations to just pleasing color). > > Jon > > > On Jun 9, 2022, at 10:03 AM, Axel Robert via colorsync-users <colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>> wrote: > > Good afternoon. > > I was wondering if somebody else already experienced and solved this problem, as well. > > We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It?s almost a late binding workflow before sending the final PDF to our printers. > > So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. > > So far, we did have any issue, but we recently received a document with a Spot Color template in it. > And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). > > We tried to find why without any success. > But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. > > The PDF export has no color conversion except an OI and OC for the PDF itself. > And despite all the color swatches we use, the result is equal. > The only difference lies when we use a PDF Export Preset which converts colors to the destination. > In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. > > How is it possible? > Would you have any idea? > > Thanks! > Axel > > UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality > Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. > I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or > follow up on this email outside your working hours. > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > colorsync-users mailing list (colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>) > Help/Unsubscribe/Update your Subscription: > https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.app…<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.app…> > > This email sent to jonmeyer(a)grafixgear.com > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > colorsync-users mailing list (colorsync-users(a)lists.apple.com<mailto:colorsync-users@lists.apple.com>) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/colorsync-users/typhoon%40correctco…<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.app…> > > This email sent to typhoon(a)correctcolor.org > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > colorsync-users mailing list > colorsync-users(a)lists.apple.com > https://lists.apple.com/mailman/listinfo/colorsync-users > > > ------------------------------ > > End of colorsync-users Digest, Vol 19, Issue 24 > ***********************************************

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Re: Spot Colors | Alternate Color Space behaviour | PDF export.
by Marc Levine 09 Jun '22

09 Jun '22

Hi Axel, Agree with Jon that Lab is the best way to define spot colors. Using Lab eliminates some unknowns in the workflow. For example, if you convert them to CMYK, they you might be changing the color unexpectedly by moving it into a CMYK gamut. Next, there's the issue of reproducing the file and making sure that the CMYK colorspace of the new "spot" if properly recognized and then transformed into your final colorspace. Using Lab skips that part because the color gets to live outside of a colorspace. That way, when you really late-bind, you have a good chance of mapping the spot into the best possible version of that color in your final output condition. In terms of "alternate colorspace", hopefully that's code for: "don't mess with the spot". When exporting to file, you can choose either "map to CMYK" or "keep as spot". If you plan on actually printing the file using spot inks.... or are unsure of the print-condition/colorspace when it will be printed... I would define your colors in Lab and leave them as spot when you export to PDF. Make sure that's clear in your rule set. If you somehow know you are printing in a particular CMYK condition and need to createa CMYK-only file, then you would use a different rule to convert your spots to CMYK. For example.... maybe you are going to print the file in CMYK-only on an offset commercial press (or a digital device that is simulating one). In that kind of scenario, converting to CMYK makes sense. Hope that helps. -Marc L -GMG Message: 1 Date: Thu, 9 Jun 2022 14:03:34 +0000 From: Axel Robert <axel.robert(a)ubisoft.com> To: "colorsync-users(a)lists.apple.com" <colorsync-users(a)lists.apple.com> Subject: Spot Colors | Alternate Color Space behaviour | PDF export. Message-ID: <EE772B4C-D403-4519-9407-9B41DBDC70D9(a)contoso.com> Content-Type: text/plain; charset="utf-8" Good afternoon. I was wondering if somebody else already experienced and solved this problem, as well. We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It?s almost a late binding workflow before sending the final PDF to our printers. So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. So far, we did have any issue, but we recently received a document with a Spot Color template in it. And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). We tried to find why without any success. But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. The PDF export has no color conversion except an OI and OC for the PDF itself. And despite all the color swatches we use, the result is equal. The only difference lies when we use a PDF Export Preset which converts colors to the destination. In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. How is it possible? Would you have any idea? Thanks! Axel UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or follow up on this email outside your working hours.

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Spot Colors | Alternate Color Space behaviour | PDF export.
by Axel Robert 09 Jun '22

09 Jun '22

Good afternoon. I was wondering if somebody else already experienced and solved this problem, as well. We built, dedicated to creative agencies, a specific color settings and pdf export couple for certain production files in which we manage ourselves the RGB to CMYK conversion. It’s almost a late binding workflow before sending the final PDF to our printers. So, all raster images remain in a specific RGB color space while Benday and vectors are still in CMYK. So far, we did have any issue, but we recently received a document with a Spot Color template in it. And when we checked it, it appeared it had been tagged on the Alternate Color Space with an ICC profile (no more specific indication). We tried to find why without any success. But we also experienced the same after many tests in In Design and Illustrator by creating a simple vector shape to which we added a Spot Color from the latest Pantone library. The PDF export has no color conversion except an OI and OC for the PDF itself. And despite all the color swatches we use, the result is equal. The only difference lies when we use a PDF Export Preset which converts colors to the destination. In such a way, the Spot Color uses the CMYK mode as by default Alternate Color Space. How is it possible? Would you have any idea? Thanks! Axel UBISOFT | Axel ROBERT |Senior Manager, Prepress & Quality Ubisoft encourages work/life balance and embraces flexibility. My workday may look different than your workday. I have sent this message at a time that suits my work pattern, but it is not my expectation that you read, respond or follow up on this email outside your working hours.

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Closing Soon [CALL FOR PROPOSALS + PAPERS] Color and Imaging Conference (CIC30)
by Roberta Morehouse 01 Jun '22

01 Jun '22

We're pleased to announce that the IS&T Color and Imaging Conference will celebrate its 30th anniversary in Scottsdale, AZ, where it all started. Be part of this monumental occasion by contributing your research and innovation in color science and imaging. In addition, this is an excellent opportunity to share, learn and engage with a global community of professionals and academics. CIC30 is pleased to have the first MANER Conference join us in 2022. The MANER Project<https://app.cristin.no/projects/show.jsf?id=675496> (Material Appearance Network for Education and Research) is an international partnership with a primary objective to establish and strengthen an international and interdisciplinary network for long-term collaborative research and education activities within material appearance measurement. IS&T Color and Imaging Conference (CIC30)<IMAGING.ORG/COLOR> Sunday 13 November - Thursday 17 November 2022 Scottsdale, AZ *********************************************************** CALL FOR PROPOSALS + PAPERS SUBMISSION DEADLINE: 6 June 2022 PROGRAM TOPICS * Color Vision * Capture and Reproduction * Material and Color Appearance * Color in Illumination and Lighting * Color Theory * Image Quality * Multispectral Imaging * Specific Color Applications * Color in Computer Graphics * Color in Computer Vision SUBMISSION OPTIONS * Short Course/Workshop - View<http://www.imaging.org/Site/IST/Conferences/CIC/CIC2021/2021CIC_Home.aspx?W…> examples of previous courses and workshops https://bit.ly/CIC29_Workshops * Conference Proceedings Paper<http://www.imaging.org/Site/IST/Conferences/CIC/CIC_Home.aspx?WebsiteKey=6d…> * Presentation-only Option<http://www.imaging.org/Site/IST/Conferences/CIC/CIC_Home.aspx?WebsiteKey=6d…> VIEW THE CALL FOR PAPERS<https://bit.ly/CIC30_CallforPapers> for complete details. https://bit.ly/CIC30_CallforPapers Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T) -imaging across applications- imaging.org <http://www.imaging.org/> Office Hours: Tuesday - Wednesday, 8:00 am - 2:30 pm Thursday, 8:00 am - 2:00 pm IS&T is a non-profit organization dedicated to advancing science and technology in imaging. Please consider donating<https://www.imaging.org/site/IST/About_Us/Donations/IST/About/Donations.asp…> today. 7003 Kilworth Lane * Springfield, VA 22151 * 703/642-9090 x105 Connect with us on LinkedIn<https://www.linkedin.com/company/society-for-imaging-science-and-technology…> and Twitter @ImagingOrg<https://twitter.com/ImagingOrg>

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