Halftone Screens Editor
The Halftone Screens editor allows you to import, delete, and customize halftone screens, and create and use ruling maps.
Halftone Screens
Screen
Select either Positive or Negative screens.
Screen Type
Select the screen type that you want to edit:
•ABS (Apogee Balanced Screening)
•Adobe Accurate
•CristalRaster Uncompensated
•Rational Tangent
Import
You can click the Import button to import another screen type to the list from file (in MIME format).
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Delete
You can click the Delete button to remove the selected screen type from the list. This will also remove any resources related to the selected halftone screens.
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Resolution
The available resolutions are dependent on the selected Screen Type.
Duplicate
You can click the Duplicate button to create a custom resolution for the Adobe Accurate and Rational Tangent screen types.
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Delete
You can click the Delete button to remove the selected resolution from the list. This will also remove any resources related to the selected resolution.
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Frequency
The available frequencies are dependent on the selected resolution.
Add
You can click the Add button to add a custom frequency for the Adobe Accurate and Rational Tangent screen types.
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Delete
You can click the Delete button to remove the selected frequency from the list. This will also remove any resources related to the selected frequency.
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Dot Shape
•Elliptical
•Round
Dot Size
CristalRaster only.
Separation/Angle
•Cyan - 15
•Magenta - 75
•Yellow - 0
•Black - 45
NOTE: You can define custom angles (positive or negative) for Adobe Accurate and Rational Tangent screens.
Ruling Maps
Ruling Map Folder
Name of the Ruling Map folder.
Resolution
The available resolutions are dependent on the selected Screen Type.
Frequency/Used Screen
Dependent on the selected resolution.
To create a new ruling map folder
TIP: You can also create new folders automatically when adding halftone screens.
1 Open the Ruling Maps pane, and click the New button.
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The Ruling Map Folder dialog box appears.
2 Type a name for your Ruling Map folder and click OK.
The new folder appears in the Ruling Map Folder list.
CAUTION: The folder you have just created is empty. This means that it does not contain any halftone screens yet. To add halftone screens to your Ruling Map folder, follow the procedure “To add halftone screens to a ruling map folder”.
To add halftone screens to a ruling map folder
To add a halftone screen to a Ruling Map folder, you must first specify the screen type, resolution, frequency and dot shape, in that order.
NOTE: For CristalRaster screen types, you must specify the resolution and dot size.
1 Select the halftone screen you want to add by selecting a screen type, resolution, frequency and dot shape.
2 Once you have specified the dot shape or dot size (CristalRaster), open the Ruling Map list.
The Ruling Map dialog box appears.
TIP: You can also enter the name of a new Ruling Map folder: This will create the folder automatically.
3 Specify the Ruling Map folder by selecting it in the drop-down list and the frequency number (lpi value), if necessary.
4 Click Add Map to add the halftone screen to your Ruling Map.
5 Click OK.
The halftone screen is added to your Ruling Map folder.
6 Select the folder in the Ruling Map Folder list and then select the specified resolution.
You can now see the halftone screen in the Used Screen list.
NOTE: When adding CristalRaster screens to a Ruling Map folder, you have to type the frequency number that you want to associate with a certain dot size. You can, for instance, type 112 and link it to a dot size of 21 microns. When using the 112 value in your pre-press application, the CristalRaster dot size 21 is automatically selected.
To change the halftone screen angle
1 Do one of the following:
•Select the screen type or
•Add a new screen type by clicking the Add button.
2 Select the resolution.
3 Select the frequency.
NOTE: This is not applicable to CristalRaster screens.
4 Select the dot shape (or dot size for CristalRaster screens).
5 To change a color separation angle, do one of the following:
•Double-click a color separation.
•Select a color separation and click the Edit button.
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You can define custom angles (positive or negative) for Adobe Accurate and Rational Tangent screens.
6 For ABS screens, select one of the available color separation angles from the list. For Adobe Accurate or Rational Tangent screens, enter a custom color separation angle of your choice.
7 Click OK.
To specify the angle for spot colors
1 Do one of the following:
•Select the screen type or
•Add a new screen type by clicking the Add button.
2 Select the resolution.
3 Select the frequency.
NOTE: This is not applicable to CristalRaster screens.
4 To specify the angle for spot colors, do one of the following:
•For new spot colors click the New button.
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•For existing spot colors select the spot color and click the Edit button.
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The spot colors will be given sequence numbers according to the separation order. The spot color itself can be specified in the Separation Settings for the Render Task Processor (see “PDF Render - Separation Settings”).
NOTE: You can specify angles not only for spot colors, but also for process colors.
To delete spot color angles that you have added
1 Select the spot color angle, and click the Delete button.
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2 Click Yes to confirm the deletion.
The spot color angle is deleted.
NOTE: You can only delete the spot color angles that you have added.
To import custom dot shapes for your halftone screens
1 From the Halftone Screens dialog box, select the Adobe Accurate or Rational Tangent screen type.
2 Select a resolution, frequency and dot shape.
3 Click the Import button.
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4 Locate the folder which contains your Dotshape packages.
These dot shape packages are in MIME or PostScript file format (*.mime, *.ps)
5 Click Open.
The custom dot shapes are displayed in the Dotshape list.
To delete custom dot shapes
1 From the Halftone Screens dialog box, select a screen type, resolution, frequency and dot shape.
1 Select a custom dot shape, and click the Delete button.
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2 Click Yes to confirm the deletion.
The dot shape is deleted.
NOTE: You can only delete custom dot shapes.
doc. version 13.1.1