The Safe Area rule is a critical consultant's note in packaging design based on the Dieline. The designer must ensure that no text, barcode, or critical visual element is placed near the cut and fold lines. This safety distance is crucial to compensate for minor errors in the Die Cut machine during final production, preventing elements from being cut off or adhering too closely to the fold edges.

The vital technical point is that when submitting the file, the Dieline must be defined in a separate layer and set not to print, as these lines are strictly production guides. Failure to separate layers and maintain the safe area is among the most common reasons packaging files are rejected in lithography, resulting in time and cost loss.