About transparency support
Transparency is an effect that you can build in Adobe Illustrator 9 and
later and Adobe InDesign 2 and later. When you write a PDF 1.4 file
from these software applications, the file contains native transparency.
Prinergy now supports transparent objects in digital masters. This
transparency support should:
●
Enable simpler, faster, and more accurate trapping
●
Retain the number of editable objects in Acrobat
●
Help to eliminate artifacts (on output, especially in low-resolution
proofs) that are sometimes introduced during flattening
Differences between Prinergy versions
Prior to Prinergy 4, transparent objects in PDF 1.4 and later files had to
be flattened to PDF 1.3 objects during the normalizing process.
Flattening is the process of converting all overlapping transparent
areas into discrete, opaque areas to represent the look of the original
transparency. Flattening retains the vector integrity of the objects as
much as possible; however, flattening may rasterize some objects,
depending upon file complexity.
The flattening feature is available in Prinergy 4 and later by selecting
Flatten to PDF 1.3
in the
Normalize
section of the refine process
template.
Handling files with transparency
The following file formats (by their nature) do not contain native
transparency:
●
PS
●
EPS
●
DCS
●
PDF 1.3 or earlier
●
PDF/X-1a (PDF/X-1a is a restricted subset of PDF that prohibits
transparency.)
(If the original file had contained transparency effects, they would have
been flattened.) Because these formats do not include native
transparency, they cannot take advantage of Prinergy 4's transparency
handling.
To take advantage of Prinergy's transparency handling, ensure that
your incoming files contain native (unflattened) transparency. To do
this, save incoming files as PDF 1.4 or later in Illustrator and InDesign.
To determine whether a PDF file contains native transparency, open
the file in Acrobat and use the Transparency Flattening tool (the
About transparency support
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