A perforated tear strip gives a carton a defined opening path. The converter needs it to remain attached during folding and handling while releasing along the intended path in use. This guide concerns cuts and bridges formed in the board; separately applied adhesive tear tape is a different operation.
Define the starting tab
The tab determines how opening begins. Keep it accessible on the closed carton and clear of bonded areas. Mark the pull direction on the dieline and check any corners in the actual opening sequence.
Distinguish cuts from connecting bridges
A perforation alternates cut sections with uncut bridges. No single cut-to-bridge ratio works for every stock. Board construction, grain or flute direction, coating and pull direction can change the result. Keep cut, crease and perforation layers distinct.
Review glue zones and fold crossings
A line under adhesive or crossing a strong fold may open differently. Inspect both strip boundaries, the tab and the termination together. Compare stock, line placement and converting movements before treating premature separation as a rule fault.
Define the converter’s sample review
On the converter’s cut and folded sample, observe starting, continuous opening, strip integrity and the remaining edge. Record early separation during handling separately from excessive opening resistance. This review forms part of production approval; it is not a transport-strength measurement or safety certification.
Information for a die order
- Dieline with marked strip
- Starting tab and pull direction
- Board, finish and grain or flute direction
- Glue areas and folds
- Observed opening defect
Send your drawing and material details for the carton box cutting dies.
