Adobe 65023809 Printing Guide - Page 122

Previewing and Flattening transparency, Fixing Hairlines

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Fixing Hairlines Whether they're from scaled-down vector artwork, or from thin stroke-weight definitions in placed artwork, fine hairlines can be problematic in commercial printing, and might not image properly in the final printed piece. The Fix Hairlines tool can find most hairlines in the document and replace them with a heavier line. You can also thicken hairlines in Type 3 fonts and PostScript patterns. 1 Choose Advanced > Print Production > Fix Hairlines, or click the Fix Hairlines tool ( ) in the Print Production toolbar. 2 Enter values for the hairline width and replacement width, and select a unit of measurement. 3 Select Include Type 3 Fonts or Include Patterns to replace hairlines in Type 3 characters or pat- terns with the same replacement width as other hairlines. 4 Specify the page range for hairline changes. You can fix hairlines for the entire document or for specific pages. Note: Because you can use font characters and patterns in a variety of contexts in the same document, changing the line weight may produce unexpected results. Be sure to check the results if you select these options, and adjust your selections as necessary. Fix Hairlines Increase the stroke weight of anemic vector art by setting a threshold value. Acrobat thickens only those strokes meeting or exceeding the threshold. Thickening Type 3 fonts and patterns may take a bit longer. Previewing and Flattening transparency Transparency is the visual interaction between overlapping, non-opaque colors in text and graphics. You can create transparency in Photoshop, Illustrator, and InDesign by using opacity percentages, blending modes, feathers, drop shadows, embossing, and similar effects. When saving or exporting files with transparency, you can choose to save the file in a format that preserves live transparency, or in a format that flattens transparent objects. If your workflow is based on the Adobe PDF Print Engine, you're well equipped to handle live transparency without having to flatten at any stage. You can maintain live transparency by saving Photoshop files as native PSD; Illustrator files as native AI, and PDFs as files that are compatible with Acrobat 5.0 and above. For more information on the Adobe PDF Print Engine, see http://www.adobe.com/products/pdfprintengine. Flattening converts layered or stacked objects with transparency into a single, flat, opaque layer. Overlapping areas are replaced with objects that replicate the look of transparently interacting objects. Overprint is used if necessary to replicate transparency effects in spot color objects. Flattening is necessary for print output to PostScript or for export to any file format that does not support live transparency (for example, EPS, JPEG, and PDF 1.3). Transparency has already been flattened in any PDF file that was created by converting a PostScript file in Distiller, but Adobe Creative Suite 4 applications can export PDF files with live transparency.

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Fixing Hairlines
Whether they’re from scaled-down vector artwork, or from thin stroke-weight definitions in
placed artwork, fine hairlines can be problematic in commercial printing, and might not image
properly in the final printed piece. °e Fix Hairlines tool can find most hairlines in the docu-
ment and replace them with a heavier line. You can also thicken hairlines in Type 3 fonts and
PostScript patterns.
1 Choose Advanced > Print Production > Fix Hairlines, or click the Fix Hairlines tool (
) in
the Print Production toolbar.
2 Enter values for the hairline width and replacement width, and select a unit of measurement.
3 Select Include Type 3 Fonts or Include Patterns to replace hairlines in Type 3 characters or pat-
terns with the same replacement width as other hairlines.
4 Specify the page range for hairline changes. You can fix hairlines for the entire document or
for specific pages.
Note:
Because you can use font characters and patterns in a variety of contexts in the same docu-
ment, changing the line weight may produce unexpected results. Be sure to check the results if you
select these options, and adjust your selections as necessary.
Fix Hairlines
Increase the stroke weight of anemic vector art by setting a threshold value° Acrobat thickens only those strokes meeting or
exceeding the threshold° Thickening Type 3 fonts and patterns may take a bit longer°
Previewing and Flattening transparency
Transparency is the visual interaction between overlapping, non-opaque colors in text and
graphics. You can create transparency in Photoshop, Illustrator, and InDesign by using opac-
ity percentages, blending modes, feathers, drop shadows, embossing, and similar effects. When
saving or exporting files with transparency, you can choose to save
the file in a format that
preserves live transparency, or in a format that flattens transparent objects. If your workflow is
based on the Adobe PDF Print Engine, you’re well equipped to handle live transparency without
having to flatten at any stage. You can maintain live transparency by saving Photoshop files as
native PSD; Illustrator files as native AI, and PDFs as files that are compatible with Acrobat 5.0
and above. For more information on the Adobe PDF Print Engine, see
.
Flattening converts layered or stacked objects with transparency into a single, flat, opaque layer.
Overlapping areas are replaced with objects that replicate the look of transparently interacting
objects. Overprint is used if necessary to replicate transparency effects in spot color objects.
Flattening is necessary for print output to PostScript or for export to any file format that does not
support live transparency (for example, EPS, JPEG, and PDF 1.3). Transparency has already been
flattened in any PDF file that was created by converting a PostScript file in Distiller, but Adobe
Creative Suite 4 applications can export PDF files with live transparency.