Creasing, cracking, rupture, splitting, and checking all mean the same thing and all mean trouble when converting corrugated board. These terms and “score cracking” generally refer to the fibre dislocation on the outside/ printing side/ label side of corrugated board. Whatever term one uses, it is an issue faced by all converters and warrants careful attention in quality control processes. Besides containerboard and the combining processes, this paper will also briefly focus on die cutting and other finishing operations as contributors to – and possible sources for - cures for – score cracking and liner rupture.

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