Adobe ACROBAT 3D Manual page 661

Converting PDF files to PDF/X
You can validate PDF content against PDF/X-1a or PDF/X-3 criteria and save a copy of
the PDF document as PDF/X, provided it complies with the specified requirements. For
example, an ICC profile that describes the destination device is required for both PDF/X-
1a and PDF/X-3 compliance. If your document doesn't have an embedded ICC output
profile, you can embed one before saving.
You can also create PDF/X-compliant files using Acrobat Distiller. (See
options.)
Important: Preflight is unable to modify the objects that make the PDF file invalid. For
example, it doesn't convert RGB color to CMYK, or embed fonts that are not embedded.
To convert a PDF file to PDF/X:
1. If the PDF/X icon at the bottom left of the Preflight dialog box indicates the PDF file is
not PDF/X-compatible, do one of the following:
Click the Convert PDF/X icon
Choose Convert Current PDF to PDF/X from the Options menu.
2. In the Convert To PDF/X dialog box, select whether to convert the PDF document to PDF/
X-1a or PDF/X-3.
3. Choose an output condition from the pop-up menu. This option indicates the printing
condition for which the document has been prepared. Any document that does not meet
the requirement will fail compliance checking.
4. Specify how to set the Trapped key. A PDF/X-compliant file requires the Trapped key to
be set to True or False. If you know that the document contains trapping information,
select Set Trapped Key To "True." If you don't know the trapping status or if you know
that the document does not contain trapping information, select Set Trapped Key To
"False."
5. Do one of the following, depending on the results of the conversion:
If the conversion succeeds, save the PDF file. A green checkmark appears in the Preflight
dialog box.
If the conversion fails, view the results in the Results list, or click Report to see the
results. A red X appears in the Preflight dialog box. When prompted, click OK to view the
Preflight results.
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Standards