Very nice, that this subject has some attendance now!
Indeed: you can only switch off "embed profiles" for PDFs without "x" specifications. But then you'll get a PDF, that still has the CMYK colours you have choosen.
Exact colours is important for very professional print, especially when there is a "corporate" scheme.
The second interesting thing (same story...) of course is, how to receive a BLACK, that isn't "look-alike" black, but that also results in black paint...
For TEXT exported from PUBLISHER (after hours) I found a way to create an own spot colour, that just consists of BLACK. (No Magenta, Cyan or Yellow in it).
Because what Affinity names "black" results in a composition of all FOUR Colours. (Sorry to say so: InDesign is so much better in this! You have a list, what's definitely in your document and that's it.)
But for VECTORS (created in DESIGNER) this isn't working!
On the "Effect" Panel you choose a colour, that's definition ist 100% black (0% Cyan, 0% Magenta, 0% Yellow...). But when exporting this (and I guess, I tried EVERY POSSIBILITY) you'll finally have your shades constisting of FOUR COLOURS! (Example enclosed).
And I doubt, that this is the truth, but I haven't found a way. (I did: with Photoshop I changed every single vector into grayscale...)
Best regards,
Vincent
circle-with-gray-shadow.pdf