Adobe InDesign - Manual (Page 771)

Note:
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Note:
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None (the default)
Horizontal
Vertical
Horizontal & Vertical
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To select one of the preset screen frequencies and printer resolution combinations, choose an option in the Screening menu.
To specify a custom halftone screen frequency, select the plate to be customized, and then enter the lpi value in the Frequency text box
and a screen angle value in the Angle text box.
Before creating your own halftone screens, check with your service provider for the preferred frequencies and angles. Also, be aware that
some output devices override the default frequencies and angles.
About emulsion and image exposure
Depending on the type of printing press used and how information is transferred from the film to the printing plates, you may need to give your
service provider film negatives or positives, with emulsion side up or down. Emulsion refers to the photosensitive layer on a piece of film or paper.
Typically, print service providers require negative film in the United States and positive film in Europe and Japan. Check with your service provider
to determine which emulsion direction they prefer.
To tell whether you are looking at the emulsion side or the nonemulsion side (also referred to as the base), examine the final film under a good
light. One side appears shinier than the other. The dull side is the emulsion side; the shiny side is the base.
Emulsion options
A. Positive image B. Negative C. Negative with emulsion side down
The emulsion and image exposure settings in the Print dialog box override any conflicting settings in the printer driver. Always specify print
settings using the Print dialog box.
Specify emulsion
1. In the Output section of the Print dialog box, for Color, choose Composite Gray or a separation option.
2. For Flip, select one of the following options:
Makes no changes to the orientation of the imageable area. Type in the image is readable (that is, right reading) when
the photosensitive layer is facing you.
Mirrors the imageable area across a vertical axis so that it is wrong reading.
Mirrors the imageable area across a horizontal axis so that it is upside down.
Mirrors the imageable area across the horizontal and vertical axes so that it is wrong reading. Type is readable when
the photosensitive layer is facing away from you. Images printed on film are often printed Horizontal & Vertical.
Specify the image exposure
1. In the Output section of the Print dialog box, for Color, choose Composite Gray or a separation option.
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