Ink type for the colorants in the PDF file is key information for trapping decisions, as is the ink printing order.

You can specify the following ink types in PDF Trap Editor:

• Normal
• Transparent
• Opaque
• OpaqueIgnored

Die line is special ink type available in the Prinergy global or per job color database. Die line colors are considered the same as transparent colors, and are not trapped.

1. In PDF Trap Editor, select the Detailed view of the Trap Page or Trap Selection dialog box.
2. Click the Inks tab.
3. Select each colorant in turn, and click its Type column cell to open a list.
4. Select an option from the ink type list for each colorant:
   • Normal: A normal ink is treated as translucent. Traps between normal inks are calculated based on the neutral density of the adjacent colors.
   • Transparent: A transparent color is not trapped, but a non-transparent object under a transparent color is trapped.
   • Opaque: Opaque inks are treated differently during trapping, because they completely hide underlying inks so that colors underneath do not show through. This means that opaque inks that are light in color can actually be trapped as though they were very dark.
   • OpaqueIgnored: An OpaqueIgnored color is not trapped. Other colors will trap to the edges of an OpaqueIgnored color. An object covered by an OpaqueIgnored ink will not trap.

See Also

Preparing a file for trapping
Rules of trapping opaque ink