Adobe ACROBAT 3D Manual page 619

Specifying trapping sequence
You can adjust the trapping sequence (also called the trapping order). The trapping
sequence matches the order in which inks are printed at the press, but it does not match
the order in which separations are produced at the output device.
The trapping sequence is particularly important when you're printing with multiple opaque
colors, such as metallic inks. Opaque inks with lower sequence numbers are spread under
opaque inks with higher sequence numbers. This prevents the last applied ink from being
spread, and still creates good traps.
Note: Do not alter the default trapping sequence without first consulting with your
prepress service provider.
To adjust the trapping sequence:
1. Open the Ink Manager. The current trapping sequence is displayed in the Sequence
column of the inks list. (To display the Ink Manager, see
2. Select an ink, type a new value for Trapping Sequence, and then press Tab. The sequence
number of the selected ink is changed, and the other sequence numbers are changed
accordingly.
3. Repeat the previous step for as many inks as necessary, and then click OK.
Using the Ink Manager.)