I want to add that white lines on the project, but don’t want that line to be visible on the printed element. How can I do that? Working in CMYK in Adobe CS6.
Answer
In Illustrator, keep your die lines in a separate layer. You can set that layer to non-print in the Layer Options dialog (double click on the layer).
Checking the Template box will also make it a non-print layer:
When you go to print, make sure that Visible & Printable Layers is selected for Print Layers.
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Source : Link , Question Author : Community , Answer Author : JohnB