In our testing, our PDF/X-1a output consistently passes the Apago and
DDAP checkers.
We found that pdfInspektor2 and PitStop provide error notifications in
the following cases even though the file is PDF/X-1a:2001-compliant:
●
Callas pdfInspektor reports in all cases that “OutputIntent Info
missing,” even though all PDF/X-1a:2001 required information is
present.
●
Callas pdfInspektor reports the use of BX and EX operators as
errors, even though the PDF/X-1a:2001 specification says these are
okay. What is prohibited are non-PDF 1.3 operators, even within BX
and EX.
●
Enfocus PitStop reports that “Document does not use modern
compression mechanisms.” This is generated in PitStop by the
“Compression is not optimal” check, which is not related to PDF/
X-1a:2001. If this check is left out, this error is not reported.
●
Enfocus PitStop reports “Custom halftone function found” whenever
there is a Halftone (HT) key. But the Halftone key is permitted in a
PDF/X-1a:2001 file if the Halftone Type is 1 or 5.
Are there any known issues with the implementation of
PDF/X-1a:2001 in Prinergy?
If a PDF/X page that has the Trapped key set to true is brought into
Prinergy and refined with the
Trap
section of the process template
enabled, Prinergy tries to retrap the page.
When creating a PDF/X-1a:2001 output file, the Trapped key in the
PDF/X-1a:2001 file is always set to false. This is because it is difficult
to automatically determine if all trapping has been done.
If an input file is a PDF 1.4 file, then the master file has the PDF 1.4
version tag in it, and possibly a Metadata key. (Note that PDF 1.4
transparency will have been flattened.) On output (using vector PDF
output, or Publish PDF output), the file has the proper PDF 1.3 version
tag and no Metadata key.
If an input file is a PDF file and does not have the Title or Producer keys
filled out, then the master file likewise does not have these keys filled
out. On output, the Producer key is filled out, but the Title key is not.
What if I don’t want to use the PDF/X feature in Prinergy?
If you don’t want to use PDF/X format as your digital master file,
simply configure your process template to generate PDF instead of
PDF/X-1a:2001. Prinergy generates digital master files the way it
always does. This allows the Prinergy functionality that is not possible
with PDF/X.
Proofs and final output
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