Belinda,
Paul - unfortunately converting everything to a set CMYK is not an
option, we only have control over the editorial content, not the
advertising. We don't touch it at all. Evrything that we actually
process gets converted to a CMYK profile apprpriate to our conditions
(Australian, mainly web fed).
You may wish to not change the Advertising material for many reasons,
but are you not changing the "intent" by printing it "incorrectly"...
This is the whole reason for the output intent identifier in PDF/X.
If you know the Advertiser has supplied you a file which is different
than you're printing condition, is converting it to the appropriate
printing condition not the correct thing to do?
You may already be doing this without being aware of it if you are
using InDesign to add fractional adds to a page of Editorial.
This is where the Alwan CMYK Optimizer product fits in nicely. It
allows you to do this in a sensible fashion.
Andy Psarianos
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