Observe for a continuous stream of bubbles emerging from a single point. Intermittent bubbles may indicate trapped surface air; steady bubbles confirm a leak.
Hold the vacuum for the specified dwell time (typically 30–60 seconds, but can be longer per internal protocols). astm d3078 pdf 2021
Submerge the sealed package completely. Ensure it is fully immersed and free of external air bubbles. Observe for a continuous stream of bubbles emerging
It is a used to detect gross leaks in sealed flexible packages. The principle is simple yet effective: a sealed package is submerged in a liquid (usually water or a surfactant solution), and a vacuum is applied. If the package leaks, bubbles will escape from the defect point. astm d3078 pdf 2021