April 2014 - colorsync-users

CMYK ICC 4.2 profiles on OSX 10.9
by info＠alessandrobeltrami.net 09 Apr '14

09 Apr '14

Dear users, I have a problem using a v4.2 ICC profile on OSX 10.9, the ICC seems well formed (thank you Phil for checking it); the profile runs well with Adobe Photoshop CS5/CC in Windows 7/8.1 and OSX 10.6, too. You can see the profile in ColorSync Utility --> Profiles list, you can open it and see all items, but you cannot use it in Colorsync Utility --> Calculator nor in Adobe Photoshop CS5/CC because it's not in the list of valid CMYK profiles. Someone notice the same problem? Here the ICC profile: https://www.dropbox.com/s/z7h6t4i4x2vm3qn/FOGRA39-Beltrami-prbOSX.icc Thank You --- Alessandro Beltrami perito industriale info(a)alessandrobeltrami.net

3 2

RE: Getting Full Color Management from Chrome + Wide Gamut Monitor (Mac) ??
by Rick Gordon 04 Apr '14

04 Apr '14

Setting up two profiles to switch between in SpectraView (one calibrated for sRGB emulation, the other calibrated for full gamut) manages the excess saturation in Chrome (when set to the sRGB Emulation profile), but the hues of web colors (particularly blues, such as the Facebook blue) look distinctly different compared to Firefox with [gfx.color_management.enablev4=true] and [gfx.color_management.mode=1] in about:config. The Chrome blue is distinctly more greenish, though images are a closer-but-not-perfect match. Rick Gordon ------------------ On 4/3/14 at 11:13 PM -0700, Rick Gordon wrote in a message entitled "Getting Full Color Management from Chrome + Wide Gamut Moni": >Having hung onto Firefox for as long as I could stand the crappy performance and stalls, I'm now throwing in the towel and trying Chrome as my default browser. > >It seems as though Chrome (or Safari) will color manage tagged images, but not untagged images or web colors, where I would prefer that they be treated as having an assumed sRGB profile. So far, I haven't found any advanced setting or plug-in to facilitate that behavior. > >Is anyone here aware of a better approach that won't oversaturate unprofiled color on my wide-gamut monitor? > >It's hard for me to believe there's not some way to do this at this point. > >I assume there's also no way by which the throughput of a given application could be managed at the system level through an additional color transform to do the trick. > >I'm running OS 10.6.8. > >Rick Gordon -- ___________________________________________________ RICK GORDON EMERALD VALLEY GRAPHICS AND CONSULTING ___________________________________________________ WWW: http://www.shelterpub.com

1 1

Getting Full Color Management from Chrome + Wide Gamut Monitor (Mac) ??
by Rick Gordon 04 Apr '14

04 Apr '14

Having hung onto Firefox for as long as I could stand the crappy performance and stalls, I'm now throwing in the towel and trying Chrome as my default browser. It seems as though Chrome (or Safari) will color manage tagged images, but not untagged images or web colors, where I would prefer that they be treated as having an assumed sRGB profile. So far, I haven't found any advanced setting or plug-in to facilitate that behavior. Is anyone here aware of a better approach that won't oversaturate unprofiled color on my wide-gamut monitor? It's hard for me to believe there's not some way to do this at this point. I assume there's also no way by which the throughput of a given application could be managed at the system level through an additional color transform to do the trick. I'm running OS 10.6.8. Rick Gordon -- ___________________________________________________ RICK GORDON EMERALD VALLEY GRAPHICS AND CONSULTING ___________________________________________________ WWW: http://www.shelterpub.com

1 0

Fw:
by Matthew Sadler 03 Apr '14

03 Apr '14

Hello! News: http://ba-ller.us/sg/wmn-news.php Matthew Sadler

1 0

Re: Assigning Pantone Colors to Heat Treated Metallic Objects
by Louis Dina 01 Apr '14

01 Apr '14

I knew this was going to be a challenge. Thank you for your responses…you've given me some great ideas and a lot to think about. I will have to discuss the level of precision required for this project with the Engineering Manager to pick a reasonable pathway ahead. I think they may only need a small number of printouts, and there are probably about 20 different heat treated metallic samples with different colors. Running Metallic Pantone Colors on a press would be prohibitively expensive, especially for such a small run. Perhaps buying the Pantone Plus Premium Metallics swatch book and making a visual match will be close enough for their use. At least the surfaces are NOT polished glossy surfaces, which would make it even more difficult. I may experiment printing onto Metallic Papers with my Epson 3880 and see how close I can get. Not very scientific, I know, and I do understand that the color temp, CRI and angle of the viewing light will play a huge role. If I can't find a cost-effective solution that comes close enough for the customer, I will probably suggest that they generate "real" samples and send them out to their customers. Appreciate it. Lou Dina

1 0

Assigning Pantone Colors to Heat Treated Metallic Objects
by Louis Dina 01 Apr '14

01 Apr '14

I need some advice on how to approach a project. I received a color management assignment from an engineering company. They heat treat metal and are in the process of preparing some polished steel discs (semi-matte, not a mirror finish), then heat treated. As the heat treating temperature changes, so does the final color of the heat treated sample, apparently quite reliably. They want me to determine the Pantone color that comes closest to each heat treatment temperature. Their final goal is to hand out printed samples that reliably reflect the temperature at which a sample was heat treated. Sounds simple. My first challenge will be getting reliable L*a*b* readings for a decent match. Just to experiment, I tried sampling the matte aluminum surface on the back of my iPhone directly using my i1Pro spectrophotometer, and got a Lab reading of 77L, -1.1a, 1.5b using D50/2° (5 different samples were all very close). Using the color picker in Photoshop (whole Lab numbers only), it says that Pantone Cool Gray 4C (Pantone Solid Coated Library) is the closest match. If I use the Pantone Premium Metallics Library, it gives me 10103C. They want me to print a few dozen accurate color charts on my Epson printer and semigloss paper, so I will have to use the Pantone Solid Coated Library. I'll probably create the file in Lab color space using the equivalent Lab numbers for each Pantone color. Here's my problem… When I hold the printed Cool Gray 4C from my Pantone swatch book against my iPhone, the Pantone sample looks a lot darker than my iPhone. Of course, if I tilt the iPhone so it receives less direct light, it gets darker and approximates my 4C sample. I'm confident the Lab values are correct. The a* and b* color data is probably quite usable, but I suspect getting a suitable brightness level that prints so it looks like the sample is going to be difficult. It's like photographing any shiny metallic object (like silverware)…I can make the object appear pure white, pure black or any shade of gray I want, depending on my lighting and the family of angles. Hmmmm. If reading directly with a spectrophotometer doesn't work well, I guess I can photograph the samples under controlled lighting, but I am faced with the same dilemma, because I can make the metal as bright or as dark as I wish depending on the lighting setup. Does anybody have experience and advice on how to proceed? Thanks, Lou Dina

6 6