Pre-press is the most important stage before the printing process

Pre-press
Pre-press is the most important stage before the printing process. Please check this page to avoid mistakes in the file preparation process, to choose an appropriate colour profile and to gather some other very useful pre-press information.

Before exporting files to PDF
Size of all pages must be equal according to order – if book is ordered in size of 210×297, then this size must be defined in document properties.
File should be prepared with crop marks (this can be applied automatically just before exporting file to PDF).
Bleed size for every document must be applied: contents, soft covers and endpapers – 3mm, hard covers – 18mm.
Correct color space must be applied. CMYK, or Grayscale is acceptable. Files must be prepared according to ISO12647-2:2013 standard, OutputIntent information must be provided in PDF file or corresponding inforrmation about color profile used must be attached to PDF file. ICC profiles can be downloaded on our website.
All spot colours should be converted to CMYK, if not intended to be printed as separate Pantone colours. RGB or Lab colours are not allowed in offset printing.
100% black must be applied for Foil, UV spot, Embossing files. Objects of these files must be converted to outlines.
Every part of the book should be saved as separate files: separate content file, cover file, endpapers, foil, UV spot etc.
Contents should be saved as single PDF file containing all pages First -> Last in correct sequence. PDF file can be divided in one, or more parts, if PDF file exceeds more than 2Gb. Files must be named according to sequence, like: “book_001-120.pdf”, “book_121-248.pdf”, etc.
Text, numbers and important design objects of file should not be placed closer than 3 mm to page edges.
To prevent too high ink coverage, correct ICC profiles must be applied according to selected paper
Correct resolution of colour pictures is 300 dpi, for bitmap files 600 dpi.
All fonts have to be embedded.
If endpapers are ordered as selfends, endpapers should be included in content file.
Blank pages have to be included in the content file.
Fine black objects (texts, lines, tables) should be 100% black. RGB or Registration colour is not allowed for offset printing.
Line width should not be less than 0,2 pt.
All 100% of black objects (text and vectors) overprint will be applied automatically in file ripping process.
Do not to use white objects in overprint mode and don’t play with object overprint settings as long as it’s really necessary.
Do not use JPEG2000 compression.