[scribus] The World Naked Bike Ride book wants to thank the Scribus team!
richard.foley at rfi.net
Wed May 30 06:50:04 UTC 2012
I agree I might be misunderstanding the problem/solution. However, I'm simply a
newbie to the details of printing at this level, although I have done some DTP
in the past. Your explanation is quite helpful and I think I have a better idea
of the issue. I believe LSI have a 240% ink limit.
However I still don't quite follow how one is supposed to:
1. specify an explicit profile to convert to CMYK and then,
2. having used the profile, to NOT include it with the PDF.
This is probably very obvious to everyone else here...
On Wed, May 30, 2012 at 07:55:52AM +0200, Peter Nermander wrote:
> > Color Book Interior/Cover:
> > Because color book files are required to be PDF/x-1a:2001 compliant, ICC
> > profiles cannot be used for any color book files.
> You are misunderstanding things here.
> They mean you can not embed a profile in the PDF.
> But a profile must be used when creating the PDF, because the
> conversion from RGB to CMYK can be done in many different ways.
> For example creating black by doing 100% cyan, 100% magenta and 100%
> yellow will cause 300% ink coverage.
> Using only black ink for black will give a dull black, so usually a
> small amount of CMY is added to give a rich black. But the amount of
> added CMY is controlled by the profile used.
> Try googling "cmyk ink coverage" and you will see that excessive ink
> coverage is a very common problem. LSI have strict limits for ink
> coverage, those limits must be adhered to.
> Obviously the default profile in Distiller is different from the
> default profile used in Scribus, but that is really not a problem
> because you should (if your are concerned about print quality) always
> specify an explicit profile to use.
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