Technical requirements of PDF/X-1a:2001 and PDF/
X-3:2003
●
Fonts must be embedded.
●
If OPI is used, the high-resolution image must be swapped into the
file and the OPI comment removed.
●
Transfer functions (TR and TR2) are not allowed. Prinergy fails
pages that contain custom transfer functions.
●
Pre-separated pages are not allowed. For whole-page copydot DCS
input, Prinergy will try to recomposite the file, which would allow a
PDF/X-1a:2001-compliant page.
●
Spot colors and CMYK are allowed; RGB and L*a*b* are not allowed.
●
LZW and JBIG2 compression are not allowed.
●
Bounding boxes are restricted. Each page must have a media box
that can include either a trim box or an art box, but not both. A page
can have a bleed box or crop box. The trim box or art box must be
entirely inside the bleed box or crop box.
●
Halftone issues:
○
Named halftones are not permitted. This means you cannot use
DotShop screening, since Prinergy relies on the halftone name to
choose the screening. When refining to PDF/X-1a:2001, Prinergy
removes any halftone dictionary that contains a HalftoneName
key, including DotShop halftone dictionaries.
○
There is no Halftone Phase (HTP key).
○
Halftone Type can only be 1 or 5 (no threshold screening).
●
Embedded PostScript fragments and PDF features beyond PDF 1.3
are not supported. Thus, transparency cannot be present; Prinergy
flattens transparencies in PDF 1.4 input.
●
Annotation use is limited. Annotations are allowed if they lie
entirely outside the bleed box, or outside the art box or trim box if
there is no bleed box. The exception is the TrapNet annotation,
which is allowed without restrictions.
Note: Prinergy does not use TrapNet annotations for trapping.
Prinergy does not use TrapNet annotations for trapping.
When refining to PDF/X, Prinergy detects and deals with all of the
above issues where possible. If it is not possible to make a PDF/X-
compliant file, Prinergy fails the file.
What happens during refining
When you refine to PDF/X, the
Normalize
,
Optimize
, and
ColorConvert
options in the refine process template must be selected.
During the normalize process, Prinergy does OPI replacement and
embeds fonts. The
Search for High-Resolution Images in Image
632
Chapter 12—Outputs
