How to Fix Crease Line Cracking in Die-Cut Paper Packaging

1. Low humidity levels making the paper overly brittle

2. Excessive heat exposure during hot air drying

3. Scoring rule height too tall, creating overly deep creases

4. Use of short-fiber paper with limited resistance to compression

5. Blunt rule tips or tight spacing, intensifying pressure on the crease line

6. Irregularities in the die-cutting base or platen misalignment

7. Inaccurate machine settings or improper pressure calibration by the operator

To resolve the issue, we advised reducing the K-rule height and ensuring the die board and platen surface were properly leveled.

In certain scenarios, it was also beneficial to adjust the paper drying process or replace the existing cutting die.

Following these adjustments, the paper cracking was completely eliminated. Production quality returned to normal, operations ran smoothly, 

and customer satisfaction improved dramatically.
 

👉 See how our R Series Creasing Rules enhance fold reliability and help eliminate crease-line failures in fragile substrates.