# [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}


With help of ghostscript, you can try these two steps:
pdf2ps document.pdf document.ps
ps2pdf13 document.ps document-v1.3.pdf