Hi Martin, all, this is a „problem“ or a „feature" with ICC based white point scaling (required for colorimetrical encoding of data). Rendering neutrals from ab=0,0 to ab=2,5 -10 is quite a change and XYZ-scaling from black to white does not reflect the required XYZ to be printed to actually get a decent print. The solution would be to use a perceptual rendering intent that does a grey mapping close to ab=0,0 and not to what XYZ scaling predicts. I know many color server device link profiles (F39 - F52 and also ECI-RGB to F52) that does this job. regards Andy Kraushaar PS: So please believe me that the people that doing this huge (unpaid) efforts also do check the separation, yes! Wir stellen den Hintergrund in den Vordergrund. We put the background in the foreground. ————————————————————————— Dr.-Ing. Andreas Kraushaar Abt. Vorstufentechnik Fogra Forschungsinstitut für Medientechnologien e.V. Einsteinring 1a 85609 Aschheim b. München Telefon: +49 89. 431 82 - 335 Telefax: +49 89. 431 82 - 100 E-mail: kraushaar@fogra.org Internet: www.fogra.org ----------------------------------------------------------------- Geschäftsführer: Dr. Eduard Neufeld | Sitz des Vereins: Aschheim b. München | Vereinsregister 4909
Am 21.08.2018 um 23:49 schrieb Martin Orpen <martin@idea-digital.com>:
Is it just me that thinks that FOGRA51 produces inferior separations and unacceptable skin colour?
Just like FOGRA52 we get separations that lack yellow when we need MORE yellow to create an acceptable skin colour.
Who makes the decisions about colour reproduction for these standards?
Have they proofed and printed the BVDM Roman 16 images with the Green and Blue backgrounds?
Did they honestly believe that skin the colour of boiled ham was acceptable?
This causes a lot of problems in pre-press workflows because clients supplying Photoshop CMYK end up with terrible looking images and any that we edit using commercial separation software (that corrects the yellow deficiency) look nothing like the images in the rest of the job.
This wasn’t the case with FOGRA39.
The new standards are producing substandard results :(
-- Martin Orpen Idea Digital Imaging Ltd _______________________________________________ Do not post admin requests to the list. They will be ignored. colorsync-users mailing list (colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/andreas.kraushaar%40...
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