Achieving Reliable Print Output from Adobe ... - Adobe Partners

Issue: White lines appear in the preview of object flattened images that have been
rotated or sheared.
Relevant product
Illustrator
Description
If placed (linked or embedded) transparent images are rotated or sheared, white dotted lines may
appear if you flattened the image using the Object > Flatten Transparency command. The lines
are more noticeable with Overprint Preview turned on. The lines do not appear when you zoom
in on the image preview zoom percentages greater than 300%. Also, the problem does not occur
when the Print/PDF/EPS Flattener is used.
Solution
This is a preview problem and does not occur when you print the image. Try flattening with Preserve
Alpha Transparency turned on. Also, try flattening the image with a Raster/Vector Balance
setting greater than 20.
Issue: The DSC comment “%%DocumentProcessColors:” found in PostScript and EPS
files that Illustrator generates always specifies that content will appear on all four process
plates when a file is flattened with the Raster/Vector Balance slider set to 0.
Relevant product
Illustrator
Description
When the Flattener flattens a file using a Raster/Vector Balance setting of 0 (all raster) and that
file contains a transparent object that uses less than all process colors, the resulting PostScript or
EPS file’s “%%DocumentProcessColors:” DSC comment will always indicate that all of the process
colors are used. If you save that file as an EPS and place it into an application, the application
will consider that all process colors are used in the EPS file. This may cause blank plates to print.
Solution
Set the Raster/Vector Balance setting to one that doesn’t cause objects to be rasterized. It may
also be possible to avoid this issue by using the command Object > Flatten Transparency to flatten
individual objects prior to saving as an EPS.
Issue: The Flattener preview is not always correct.
Relevant product
Illustrator
Description
The Flattener preview may not correctly show some text that gets converted to outlines or some
areas that get rasterized.
Some native objects may be expanded upstream or downstream of the Flattener preview, and it
has no way of detecting these native images. For example, Illustrator type with a certain style
applied gets outlined before being sent to the Flattener.
Solution
There is no workaround. This is not a problem that causes improper printed output. It only
relates to previewing rasterized artwork, outlined text, or expanded patterns that occur ahead of
the flattening process.
Note that the following commands, effects, or applied graphic styles in Illustrator can rasterize
artwork, expand patterns, or outline text: Rasterize effect, Crystallize effect, Pointillize effect,
Transmogrifier graphic style, Dropped Sherbet Type graphic style, Text objects modified with
the Envelope Distort command.
Achieving reliable print output from Adobe
applications when using transparency
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