Le 14/02/2012 20:35, Peter Linnell a ?crit : > A couple of pointers: > > PDF-X does not handle transparency at all. It is a limitation of the spec. > > PDF-X3 allows mixing of CMYK and RGB images. In fact it can be all CMYK or > all RGB, as well. > > Color is disabled in the PDF tab as certain settings cannot be disabled to > ensure the pdf is compliant to the spec. > > Myself, I would be sending pdf 1.4 and if the transparency results are not > correct, then it is an issue with the > printer's workflow. Are they importing the PDF into another application > beyond Acrobat Pro ? > > You are welcome to send me off list a link to the file, where I can run some > special pre-preflight tools to verify the pdf.
Thank you very much for your attention and proposal. I have changed all pictures to be CMYK and think it should have solved the problem as for this printrun ! For next prints, i might investigate closer the PDF norms and Scribus behaviours and printers real abilities as for colors ... and opacity too ! JLuc
