Why methylene blue use for leak testing and how much percentage for blister,strips.
Methylene blue dye or another colored liquid were use to determine whether or not there is a leak during leak testing of particular pack. If there is a leak in sealed pack , the liquid will seep into the package, thereby giving visual proof. However now day , due to carcinogenicity its banned.
Few drop of methylene blue is well enough for producing light blue solution, which is required for good visualization proof for any leakage pack.
Why we don’t use leak tested tablets for reprocessing (packing)?
We cann’t using the leak tested tablets/capsules for reprocessing/packaging as its intactness might be fail due to vacuum apply during leak testing. Regulatory agency never prefer for reprocess/re-packaging after leak testing.
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