So I have this PSD with several transparent layers. As I need to hand out the file for a professional printing, I export it through Photoshop (CS5) using the usual PDF/X-4:2008 PDF 1.4 profile to ...
I've created a document using OpenOffice / LibreOffce with a black background and PNG images which have some transparency. I exported that document to PDF and printed it. The black which comes from ...