June 2019 - colorsync-users

Re: Epson Enhanced Matte
by Pat Herold 20 Jun '19

20 Jun '19

I’ve looked up your exact papers in profiling targets we have saved. These measurements were made with an eXact in M1 mode. Epson Enhanced Matte: 96, 2.08, -5.57 Epson Presentation Matte 91, 2.47, -8.19 I guess you still need to take this with a grain of salt. Although they were stored in a dark cabinet, they are still several years old (the enhanced matte is the older - 2014), and OBA’s may have lost their punch over time. Pat Herold Tech Support herold(a)chromix.com 206-985-6837 ext #6 206-388-2558

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Share your research on Material Appearance
by Roberta Morehouse 19 Jun '19

19 Jun '19

Share your research on Material Appearance at the GDR APPAMAT workshop during CIC27 21 October 2019 in Paris. This workshop aims to provide an overview of different disciplinary fields connecting the appearance of materials, surfaces, and objects with emphasis on characterization by measurement, prediction by modeling, virtual prototyping, and manufacturing and reproduction of objects with visual effects. Submit your research and developments on topics in materials, Nanoscience, optics, imaging, computer science, Metrology, perception, art and design. CALL FOR CONTRIBUTIONS DEADLINE 10 September 2019 Learn more @ http://ow.ly/KcOW50uI3WI Connect with our community! LinkedIn IS&T CIC Group Twitter @ImagingOrg CIC27 | Subscribe to the Color & Imaging list for news and discussion

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RE: Epson Enhanced Matte
by graxx＠videotron.ca 19 Jun '19

19 Jun '19

Found the Lab data for the Enhanced Matte 190! Had to leave the mouse over the media name, for the yellow "tab" information to appear. But... only CIE Lab 96.03 0.6 -2.1? I guess the instrument used to make the measurement, an X-Rite Eye One Basic, means that this is an "M0" or "Unfiltered UV" or "Legacy" measurement. So, using an M1 instrument, the b* value would a little more "negative". But by how much? The Doubleweight Matte 160 is CIE Lab 93.3 1.9 -4.4, a little "better" for my purpose, despite the lower ISO Brightness number? If I'm to stick with Epson, my "best" bet is with Presentation Matte 172, at CIE Lab 94.6 2.2 -5.8. Best / Roger -----Original Message----- From: Martin Orpen <martin(a)idea-digital.com> Sent: Tuesday, June 18, 2019 5:50 PM To: graxx(a)videotron.ca Cc: 'colorsync-users?lists.apple.com' List <colorsync-users(a)lists.apple.com> Subject: Re: Epson Enhanced Matte > On 18 Jun 2019, at 21:57, Roger Breton via colorsync-users <colorsync-users(a)lists.apple.com> wrote: > > Hate to ask but would anyone have “real” CIE Lab measurements (farbmessung) for this paper? Thanks for your patience and help. Roger Ernst Dinkla’s SpectrumViz has measurements for loads of inkjet papers: <http://www.pigment-print.com/spectralplots/spectrumviz_1.htm> Requires JRE to run. Cheers -- Martin Orpen Idea Digital Imaging Ltd

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Epson Enhanced Matte
by graxx＠videotron.ca 19 Jun '19

19 Jun '19

I would like to find an obnoxiously strong optically brightened inkjet paper to conduct color separations experiments using M1 colorimetry, on an Epson printer. Last time, I used Epson Doubleweight Matte paper for this purpose which was around : CIE b* = - 9.00 to -10.00, give or take. (Lost the measurement files…) I was up on Epson web site, earlier, looking for “specs” for that very paper but could not find anything “useful”, to give me some indication of the degree of optical brightening ☹. I eventually landed on this page : https://epson.com/For-Work/Paper/Presentation/Doubleweight-Matte-Paper/m/S0… Sadly (big sigh!), Epson does not offer any “numbers” on their web site for their papers, not that I’ve seen, other than, possibly, “ISO Brightness”. I don’t suppose one could go from “ISO Brightness = 84%” to anything remotely useful for colorimetry? Epson “Enhanced Matte Paper”, on the other hand : https://epson.com/For-Work/Paper/Presentation/Enhanced-Matte-Paper/m/S041725 seems to suggest higher OB content than Doubleweight Matte, with ISO Brightness = 104%? Still, no mention of measured substrate (unprinted media) color…. A quick trip down the C:\Windows\...\color directory on my Dell computer turns out the following Epson ICC profile (installed by the driver for the Epson SureColor P5000 printer): SC-P5000_Series_LLK EnhancedMattePaper_PK.icc According to this ICC profile (ICC Profile Inspector.exe), White Point is : CIE XYZ = 88.13 91.68 75.38 or CIE Lab = 96.69 -0.47 0.21 Seems dubious, at best? CIE b* should be way more “negative” than this? Hate to ask but would anyone have “real” CIE Lab measurements (farbmessung) for this paper? Thanks for your patience and help. Best / Roger

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RE: colorsync-users Digest, Vol 16, Issue 35
by graxx＠videotron.ca 19 Jun '19

19 Jun '19

Thank you, Malcom. You're right, the whole thing needs to be assessed, not just the tubes. I superimposed the spectrum image you sent with the one from my humble Excel sheet (tried to aligned them at 560nm) and it is clear that the new tubes have more energy around 360nm. https://1drv.ms/u/s!AkD78CVR1NBqkLUuwGMsH5ObGTay4A I still wonder what the visual difference is like, the same print viewed in two light booths, one with the old lamp and one with the new, E tubes? If the substrate incorporates a lot of OB, like b* = -6.00, the booth with the new lamps should make all color appear "bluer" overall, right? / Roger -----Original Message----- From: colorsync-users <colorsync-users-bounces+graxx=videotron.ca(a)lists.apple.com> On Behalf Of Malcolm Mackenzie via colorsync-users Sent: Monday, June 17, 2019 5:00 AM To: colorsync-users(a)lists.apple.com Subject: Re: colorsync-users Digest, Vol 16, Issue 35 Re; 1. ISO-3664:2009 illumination (graxx(a)videotron.ca) Hello Roger Just to add, if the luminaire uses a glass or plastic cover you have to check if it is effectively UV filtering. Most old and many modern ones are. Below is a GTI reading, no glass which is 3664:2009 compliant. [image: GTI.png] regards Malcolm Mackenzie Colour Engine

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RE: colorsync-users Digest, Vol 16, Issue 38
by graxx＠videotron.ca 19 Jun '19

19 Jun '19

I remember my mother would add "bluing" powder to the final rinse. I guess I was "destined" for color management 😊 / Roger -----Original Message----- From: colorsync-users <colorsync-users-bounces+graxx=videotron.ca(a)lists.apple.com> On Behalf Of Vincent Heuring via colorsync-users Sent: Tuesday, June 18, 2019 3:23 PM To: colorsync-users(a)lists.apple.com Subject: Re: colorsync-users Digest, Vol 16, Issue 38 Back in the day, I was a chemist for P&G. Almost all laundry detergents have a “brightener” added, to counteract the faint off-white cast of laundry. As described, they absorb UV, and emit blue, which counteracts the slight yellow cast of the laundry. Before the advent of brighteners, housewives would add “bluing" to the final rinse. Bluing was a shaker bottle of a suspension of blue dye. See https://en.wikipedia.org/wiki/Optical_brightener for more details. -- Vincent Heuring Professor Emeritus Dep't of Electrical, Computer, and Energy Engineering University of Colorado at Boulder h) 73335 Pinyon St, Palm Desert CA 92260 heuring(a)colorado.edu c)720-346-4635 http://ecee.colorado.edu/~heuring

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RE: Epson Enhanced Matte
by graxx＠videotron.ca 19 Jun '19

19 Jun '19

Chromaxion is quite extensive! Once I located the corresponding "Spectrashop Collection", it was a cinch to download and open in Spectrashop. I noticed that you used the D65 filter with the Spectrolino. Please excuse my ignorance but could that make the measurements more "M1-like"? Thank you so much / Roger -----Original Message----- From: colorsync-users <colorsync-users-bounces+graxx=videotron.ca(a)lists.apple.com> On Behalf Of Robin Myers via colorsync-users Sent: Tuesday, June 18, 2019 6:45 PM To: colorsync-users(a)lists.apple.com Subject: Re: Epson Enhanced Matte I have measured some papers and published their CIECAM02 colorimetric values on my Chromaxion website at http://chromaxion.com/information/fine_art_paper.html <http://chromaxion.com/information/fine_art_paper.html>. Some have bc values over -17. Robin Myers Imaging robin(a)rmimaging.com robin(a)chromaxion.com

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RE: XRite i1Pro3+ announcement
by graxx＠videotron.ca 18 Jun '19

18 Jun '19

Interesting development -- thanks Martin! / Roger -----Original Message----- From: colorsync-users <colorsync-users-bounces+graxx=videotron.ca(a)lists.apple.com> On Behalf Of Scott Martin via colorsync-users Sent: Tuesday, June 18, 2019 5:34 PM To: 'colorsync-users?lists.apple.com' List <colorsync-users(a)lists.apple.com> Subject: XRite i1Pro3+ announcement XRite brings polarized, transmissive and large aperture measurements back with the i1Pro3+. https://www.xrite.com/about-us/news-events/press-releases/xrite-announces-i… <https://www.xrite.com/about-us/news-events/press-releases/xrite-announces-i…> Polarized M3 measurements mean smooth shadow tonality and better color saturation on textured surfaces like glossy canvas. The large 8mm aperature (vs the i1Pro2’s 1.5mm) translates into data rich, extreme shadow measurements and the smoothed averaging of textured surfaces and large dot patterns. The i1Pro3+ contains a new LED illuminant that allows for simultaneous M0, M1, M2 measurement in a single pass. Transmissive scanning allows us to measure and profile backlit printing processes with any light table. An updated iO table supports the i1Pro3+ for reflective measurement. More soon... Scott Martin www.on-sight.com Precise color science for printmaking professionals

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RE: Epson Enhanced Matte
by graxx＠videotron.ca 18 Jun '19

18 Jun '19

Thanks Martin! Found the Java application. Found an entry for Epson Enhance Matte 190. Seems there is only the spectral power distribution? https://1drv.ms/u/s!AkD78CVR1NBqkLU6cr18kUkoqOLkWQ No "download data" button ☹ Best / Roger -----Original Message----- From: Martin Orpen <martin(a)idea-digital.com> Sent: Tuesday, June 18, 2019 5:50 PM To: graxx(a)videotron.ca Cc: 'colorsync-users?lists.apple.com' List <colorsync-users(a)lists.apple.com> Subject: Re: Epson Enhanced Matte > On 18 Jun 2019, at 21:57, Roger Breton via colorsync-users <colorsync-users(a)lists.apple.com> wrote: > > Hate to ask but would anyone have “real” CIE Lab measurements (farbmessung) for this paper? Thanks for your patience and help. Roger Ernst Dinkla’s SpectrumViz has measurements for loads of inkjet papers: <http://www.pigment-print.com/spectralplots/spectrumviz_1.htm> Requires JRE to run. Cheers -- Martin Orpen Idea Digital Imaging Ltd

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Re: colorsync-users Digest, Vol 16, Issue 38
by Vincent Heuring 18 Jun '19

18 Jun '19

Back in the day, I was a chemist for P&G. Almost all laundry detergents have a “brightener” added, to counteract the faint off-white cast of laundry. As described, they absorb UV, and emit blue, which counteracts the slight yellow cast of the laundry. Before the advent of brighteners, housewives would add “bluing" to the final rinse. Bluing was a shaker bottle of a suspension of blue dye. See https://en.wikipedia.org/wiki/Optical_brightener for more details. -- Vincent Heuring Professor Emeritus Dep't of Electrical, Computer, and Energy Engineering University of Colorado at Boulder h) 73335 Pinyon St, Palm Desert CA 92260 heuring(a)colorado.edu c)720-346-4635 http://ecee.colorado.edu/~heuring > On Jun 18, 2019, at 12:00 PM, colorsync-users-request(a)lists.apple.com wrote: > > There’s nothing like a free lunch. Through OBA’s the paper industry succeeded to turn paper into mini displays (capture UV-light and emit as blue light).

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