2025-10-15
Ensuring a glass bottle is leak-proof is a critical quality standard, especially since many glass containers hold foods like pickles. If a bottle leaks, air can enter, shortening the product’s shelf life and potentially affecting consumers’ health. So how do we verify a bottle’s seal is reliable? Here’s a brief overview.
Seal inspection for glass packaging bottles (e.g., a 16 oz beer glass mug) can be carried out in three stages:
- First, examine the bottle cap to ensure it’s in good condition.
- Next, check the bottle’s lip to confirm it is level and shows no signs of cold rolling.
- Finally, determine the tightening point: with the cap engaging the first two-thirds of the bottle’s thread, use a ruler to measure the distance from the bottle-neck thread to the nearest starting edge of the cap’s claw. This distance is the tightening position. Readings taken to the right of the bottle-neck thread are considered positive; those to the left are negative.
These steps outline how to verify a glass bottle’s seal and should be helpful for most readers.
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