Alright packaging folks, pass on to me what "industry standard" is in this case. I'm evaluating suppliers of HDPE 1 gallon bottles and getting into discussions over leak detection verification.
From my perspective, a leak in a bottle is an unacceptable defect, and since they're using an in-line leak detector to reject bottles, monitoring/verification of this equipment should be similar to metal detection with checks at start/end of shift at minimum and if the equipment is found to not be working all material since the last good check should go on hold for rework or disposal.
Is this fair? I've had problems with regrind-contamination leaks in the past that should have been caught by the leak detector tolerances and I'm getting strict on this issue. What verification procedures/intervals have you all seen? What % of bottles with leaks above the detector's tolerance are expected to make it past this step?