[Tex/LaTex] Problems with pdfLaTeX because of transparencies and transfer curves

pdftexprintingtransparency

I'm about to finish my report for this semester. My document inlucdes a lot of pictures and schematics from different (external) sources. Now the printery (prepress) is complaining about transparencies and transfer curves in my final pdf.

I know that transparencies and transfer curves are included in the images I use (mainly PDFs) and pdfLaTeX doesn't seem to reduce transparencies. Is there a way to tell the compiler to create a document that is suitable for professional printing? I included a list of the packages I used. Thanks for help!

\documentclass[11pt,a4paper,abstracton,toc=flat,listof=flat,numbers=noenddot]{scrreprt}

\usepackage[ansinew]{inputenc} 
\usepackage{graphicx}   
\usepackage[ngerman]{babel}
\usepackage{parskip}    
\usepackage{color}      
\usepackage{lmodern}
\usepackage{booktabs}   
\usepackage{geometry}   
\usepackage{longtable}  
\usepackage{microtype}  
\usepackage{amsmath}    
\usepackage{ziffer}     
\usepackage{xfrac}      
\usepackage[printonlyused]{acronym}
\usepackage{enumitem}   
\usepackage{float}      
\usepackage{setspace}   
\usepackage{marginnote} 
\usepackage{eurosym}    
\usepackage{pdfpages}   
\usepackage{lipsum}     
\usepackage{subfig}     
\usepackage[colorlinks,pdfpagelabels,pdfstartview = FitH,bookmarksopen = true,bookmarksnumbered = true,linkcolor = black,plainpages = false,hypertexnames = false,citecolor = black]{hyperref}
\usepackage{scrpage2}

Best Answer

With help of ghostscript, you can try these two steps:

  1. convert your PDF file from PDF to PostScript (default: level 2):

    pdf2ps document.pdf document.ps

  2. convert this PostScript file from PostScript to PDF v1.3:

    ps2pdf13 document.ps document-v1.3.pdf
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