THE QUALITY OF YOUR DATA
The data should be prepared in compliance with the norm PDF/X1a:2001:
· PDF version 1.3
· all fonts including subsets must be embedded in the file
· resolution of bitmap images: 300 dpi (with ZIP or JPEG compression); resolution of clip art: 1,200 dpi (with CCITT Group 4 compression)
· use only composite CMYK, Grayscale, or spot colors (ideally, colors are clearly defined by a Pantone Solid Coated sample)
· no objects may be in RGB or LAB space
· do not insert ICC profiles (color management turned off)
· all objects must be inserted in the document (OPI functions are not permitted)
· the page box must be defined correctly (Media Box, Trim Box).
· bleed: 3 mm
· print marks may not reach the bleed area
· PDF files may not contain objects with transparency – it is necessary to merge the transparency in the source files (in the application Adobe InDesign set the merger of transparency at high resolution)
· transfer functions are not permitted
· do not use lines thinner than 0.2 points (0.07 mm)
· the document may not contain any embedded fragments of PostScript code, JavaScript, objects like forms, bookmarks, articles, links, videos, sounds etc.
· pages in PDF must be arranged successively (they may not be arranged side-by-side)
· the document may not be secured