![]() But when I found your advice to uncheck the 'Embed profiles' option, problem fixed! I was scratching my head because I don't remember this being a problem in the past. With the default 'PDF (press ready)' preset, the profile is set to 'Use document profile'. After PDF export, the black is changed to a CMYK mix every time: The text colour is K:100 as shown by selecting the text and double clicking on the fill colour well: I checked the seps in your 'PDF Output Preview' app, as well as the PDFTRON WebViewer Demo, and both show the same thing, so I don't think it's an 'illustory' Acrobat issue as you described it earlier.Ĭolour profile: Coated FOGRA39 (ISO 12647-2:2004) I don't do this stuff regularly enough anymore to come across this often, but I just had to output a couple of jobs and could not work out why the black was being converted to a CMYK mix. I tried all PDF export files, but none of them worked well with the combination of a spot color + vector illustration, as far as I confused about this issue too. PDF/X-based methods would otherwise to fine, but they do not work well if you have placed PDFs that are meant to be passed through (these files might get rasterized if there is PDF version "incompatibility", as Serif puts it).ĮDIT2 seems to be working – now I can see only K from CMYK values in Acrobat preflight preview InDesign (or QuarkXPress) because the defaults are such that ICC profiles are not eimbedded if not needed, and when included, the target intent is included, as well.ĮDIT2: The way to avoid most of the printing issues that exist in Affinity apps when producing for commercial press is to choose "PDF (for press)", and then changing the following two options as shown: But this problem does not happen when you produce PDFs from e.g. Packzview as prefilight tool so it might be Adobe-specific, so in that sense "illusory". This problem does not happen when you use e.g. Another option is to use any of the PDF/X-based export methods, as these presets embed the required profiles, but additionaly include the output profile intent so that Adobe Acrobat Pro automatically picks the correct simulation profile.ĮDIT: It is not completely clear to me whether this confusion could actually result (by itself) in erroneous print-out, but I am certain that it can confuse (inexperienced) press personnel, and might actually lead in a situation where colors get mixed. ![]() In such situation, simply changing the simulation color profile (in Output Preview of Adobe Acrobat Pro) to match your Publisher working CMYK color space should correct the problem, but I would rather unceck the "Embed ICC Profile" option, and re-export as then it does not matter which simulation profile you use. ![]() If this target is different than what you have in Adobe Acrobat Pro (which shows the default Adobe CMYK target Coated Fogra 39), the Output Preview will show ad-hoc converted CMYK values, where e.g. Affinity apps by default include the target ICC in the PDF, which is basically not needed since everything is already in target color space. This could be the "illustory" problem of having a device-CMYK PDF that is produced if you used "PDF (press-ready)" and either had the images already in CMYK mode, or checked "Convert image color spaces" export option under the "More" PDF export option page.
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