Part 1: Print proofing
For the cover, go through the list (see Part 1: Print proofing). Activate the preflight verifier in Scribus (Windows > Preflight verifier) and selected the profile PDF/X-3. If any problems are reported, correct them.
Go through the same process for the pages.
The following settings are used both for the cover and for the pages (File > Export > Save As PDF):
- Output one file for each page: unchecked.
- General tab: All pages, Compatibility: PDF/X-3, Compress text and vector graphics: checked.
- Fonts tab: Fonts to embed: click Embed all.
- Extras tab: Enable presentation effects: unchecked.
- Viewer tab: Document Layout: Single Page, Visual Appearence: Use Viewers Default.
- Security tab: Use Encryption: unchecked.
- Color tab: Output intended for: Printer, is already checked (and grayed out), Convert Spot Colors to Process Colors: checked.
- Pre-Press tab: Printer Marks: all unchecked, Bleed: Use Document Bleed: Checked. Output profile: Blurb_ICC_Profile.icc. Info string: name of Scribus document.
Name the document and click the Save button.
Do this for all Sribus document parts.
Join PDF/X-3 documents
For PDF/X-3 we recommend Ghostscript to merge PDF documents (see Creating a PDF/X-3 document). While the result of this process still produced an error with the Adobe Acrobat X Pro preflight check (“Page boxes not nested properly”), the author of the part of Ghostscript which handles the conversion, doesn't consider this an PDF/X-3 validation error (see pdfwrite - check annotation placement and Box sizes for PDF/X-3 validity).
Use the following command in a terminal (see the Ubuntu documentation for using the terminal):
gs -dPDFX -dBATCH -dNOPAUSE -dUseCIEColor -dNOOUTERSAVE -sProcessColorModel=DeviceCMYK -sDEVICE=pdfwrite -sOutputFile=outputfile.pdf PDFX_def.ps file1.pdf file2.pdf ...
where you replace outputfile.pdf with the name of your final PDF document and file1.pdf etc with the names of the PDF document parts. Download our PDFX_def.ps, open it in a text editor and modify the lines marked "Customize", and save it in the same directory as the PDF documents (file1.pdf etc).
The Use Color Profile option
A note about the Use Color Profile option (in the File > Export > Save as PDF > Color tab). If Use Color Profile is not checked (and Output intended for is set to Printer), every image will be converted to CMYK according to the color management setup. This most probably increases the size of the final PDF – CMYK uses 4 color channels (C, M, Y and K) as opposed to the three channels of RGB (R, G and B). If it is checked, images are not converted but the color profile embedded in the image will be embedded in the PDF too. This is why this option is checked and grayed out when creating a PDF/X-3.
Part 3: PDF quality control
Enter the following in a terminal to check that the PDF document is of the right version:
pdftk mydoc.pdf dump_data
Print shop quality control
The print shop hopefully checks the PDF document before printing. If unsure, ask them for a printed proof before starting the final print run.