Gerber OMEGA CP Reference Manual page 274

260 Chapter 25:
Solving Printing and Registration Problems
7 Enter the Bleed amount in the text box.
8 Turn on the Bleed Cut On check box.
9 Enter the Bleed Cut amount (the distance to print beyond the edge of the thickness) in
the text box.
10 Click Continue.
Note: The Trapline Off button in the dialog box appears after a trapline is assigned and is used
to remove a trapline when Smart Editing.
Filling registration gaps with chokes and spreads
Choke/Spread in the Tools menu provides more control than some other methods when filling
the registration gap between two filled shapes which touch each other.
Choke/Spread extends a color under the color selected as the top color by the amount specified
in the Choke/Spread dialog box. This allows you to specify a very small amount (.010, for
example) which is enough to fill a registration gap without creating a Spectratone color with the
overprinting foils.
There are important rules, which must be followed when using Choke/Spread.
♦ If possible, select the darker color as the top color. The darker color will print over the
lighter color better.
♦ If both fills are not solid fills, or if the top color is not a solid fill, use a small
Choke/Spread amount to fill the registration gap (such as .010).
♦ The shapes must be filled. They cannot be cut-only shapes.
♦ The fill attributes in each shape must be different.
♦ Only two fills are allowed, but more than one shape with each fill can be selected.
♦ Selected shapes must be touching. One shape can enclose or surround another, or the
shapes can be overlapping or abutting.
♦ When Choke/Spread is used, all cutlines are removed.
To fill a registration gap with choke/spread
1 Select the shapes, then click Tools > Choke/Spread to open the Choke/Spread dialog
box.