I just read a good book on DTP.
The autor stated, that one should not attach color ICC profiles to images placed in a publication (say when placing an image into InDesign document). The author doesn't explain this further unfortunately.
Can someone explain to me, why not attach ICC profiles to images placed in a publication, does it cause problems in production? And does this apply to PDF/X-1a only, or also to PDF/X-4 workflow? As far as I understand, PDF/X-1a is not color managed and PDF/X-4 is. I read somewhere, that the first doesn't allow ICC profiles, and the other does.
Still, from what I understand. An output ICC profile is allowed, but not per image ICC profile.
Can someone explain this to me? I'm confused enough.