July 2017 - colorsync-users

Re: Colorsync-users Digest, Vol 14, Issue 14
by Malcolm Mackenzie 10 Sep '17

10 Sep '17

Hi Martin I did a few tests in i1P and confirm your findings. The "Intelligent Black" feature does odd thing when it thinks TAC should be low and the Max K separation/width is contributing to the low yellow. I've had issues with the settings for digital as have others online. I remade the profile with the same data and it was fine, so it's an i1P thing. I've never got an answer or seen one from X-Rite on the issue. Malcolm +44 (0)20 3239 3330 +44 (0)7910 413421 mm(a)colour-engine.com skype; print_and_proof LinkedIn <http://uk.linkedin.com/pub/malcolm-mackenzie/7/326/778/> Twitter <https://twitter.com/ColourEngineLtd> www.colour-engine.com TeamViewer Quick Support <https://get.teamviewer.com/xjv8qcf> On 6 March 2017 at 20:00, <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. Re: FOGRA52 & i1Profiler (Martin Orpen) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 06 Mar 2017 13:44:12 +0000 > From: Martin Orpen <martin(a)idea-digital.com> > To: "'colorsync-users?lists.apple.com' List" > <colorsync-users(a)lists.apple.com> > Subject: Re: FOGRA52 & i1Profiler > Message-ID: <3C5CA2A6-7570-4A90-925E-6C78A7403549(a)idea-digital.com> > Content-Type: text/plain; charset="utf-8" > > > > On 1 Mar 2017, at 00:21, Martin Orpen <martin(a)idea-digital.com> wrote: > > > > I’ve made some MaxK and Full Black profiles using both the supplied > FOGRA52.mxf and by importing the raw ECI data and they produce a Y channel > that has next to nothing in it if you use the profiles in Photoshop. > > > I guess that FOGRA52 isn’t that popular then? > > The PSO Uncoated v3 (FOGRA52) profile documentation says: > > > The profile was created using the Heidelberg Color > Tool 17 with the following settings: > black length 9 (starting point 10%) > black width 10 > total dot area 300% > maximum black 96% > > > I can’t get yellow values anywhere near those generated by this profile > using i1Profiler or ArgyllCMS. > > And nothing even remotely close to the neutral curves of the Heidelberg > perceptual rendering. > > So I gave up and separated to a custom built FOGRA47L instead and then > proofed the job to FOGRA52. > > I find it odd that the dark patch on the ECI/BVDM Gray Control Strip for > FOGRA52 is C62 M55 Y60 — an ink combination that the ICC profile is > incapable of producing... > > -- > Martin Orpen > Idea Digital Imaging Ltd >

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Re: Epson SureColor P5000 problem
by Alexey Gribunin 03 Sep '17

03 Sep '17

Heh, I got the same message on my P5000 two days ago. I also tried everything except Power Cleaning, but also without any success. I also tried to update printer's firmware, but also without success because the printer is in Unknown state (as shown thru printer's web interface), not in Ready state. I found the following description of similar warning in P20000 guide: =============================== Perform Powerful Cleaning on all nozzles. You have not cleaned the print head nozzles in six months and Timer Cleaning is set to Off. Run a Powerful Cleaning cycle in the Administrator menu. =============================== It seems Epson made this special feature to prevent head clogging... Best regards, Alexey Gribunin, UNIT Color Technologies, Moscow, Russia. On 25/07/2017 22:00, larry(a)colorburstrip.com wrote: > Yes - it happened after > letting the printer attempt an auto-nozzle clean. The auto-clean did not > finish getting them clean so it left this message. After doing manual > cleanings and manual tests to verify that all the jets were fine, I was > stuck with this message. Power off and unplugging the power did not > clear it. Another auto-clean (which passed okay) did not clear it. > Clearly a bug and I have no idea how to clear it. I'm not going to do a > Power Cleaning as this will waste too much ink. On 2017-07-24 20:57, Martin Orpen wrote: >> Anybody using the P5000 and encountered this, undocumented, warning from the LCD panel: >> >> Perform Powerful Cleaning >> (All Nozzles) from >> Administrator Menu. >> >> Heads on our P5000 are perfect on both the printed and non-printed head tests, but we can't get rid of this warning message :(

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EFI ES-2000
by Steven Kornreich 31 Jul '17

31 Jul '17

Will the EFI ES-2000 Spectro work with Xrite i1 Publish? Thanks ________________________________ Steven Kornreich steve(a)kuau.com http://www.kuau.com

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ICC applying in macOS 10.12
by Vitaly Bondar 28 Jul '17

28 Jul '17

Dear ColorSync specialists, I want to recheck with you is my understanding of ColorSync displays principals is correct. Is it correct that for any desktop window in the macOS ColorSync make next color transformation: - transform RGB to XYZ via "Generic RGB profile.icc" with relative colorimetric intent - transform XYZ to RGB' via display profile with the intent from profile header (display that contain most part of window) - show RGB' - Additionally VCGT tag used to apply graphics-board LUT And all that transformations made without using chad (chromatic adaptation). Please point me if there is something wrong in this statements. And maybe i missed something. Also I'm interested to hear ColorSync developers what is their expectations to displays profile. Is display profiles can be used only for display matching in macOS? Or there is correct combination of accurate profile and vcgt that can describe and calibrate display in same time? The problem that i see here is next. If I have profile built by the display measurements and then add vcgt tag to change color or gamma of the display, then profile is not describing current display state anymore. In such case i feel that color-managed software can't rely on such profile anymore. With opposite approach we also have a problem: If I build profile with the applied vcgt to have accurate display profile and then apply it to the display, then macOS use it to match colors to generic rgb. So vcgt calibration lost in result. Maybe you have some described recipes how to create correct display ICC profile that change display gamma and in same type describe new state. One more question. Is it possible to end-user and to developers to change main color space (Generic RGB be default)? And why was Generic RGB chosen, not Apple RGB for example? Any help very appreciated. Thank you. Best regards, Vitaly Bondar

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Epson SureColor P5000 problem
by Martin Orpen 25 Jul '17

25 Jul '17

Anybody using the P5000 and encountered this, undocumented, warning from the LCD panel: Perform Powerful Cleaning (All Nozzles) from Administrator Menu. Heads on our P5000 are perfect on both the printed and non-printed head tests, but we can’t get rid of this warning message :( -- Martin Orpen Idea Digital Imaging Ltd

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