ASTM standards are designated by a fixed number followed by the year of original adoption or revision.
The method cannot distinguish between a 5 µm hole and a 200 µm hole – both produce bubbles.
A transparent container filled with water, connected to a vacuum pump. Water: Serving as the submerged medium to detect bubbles. Vacuum Gauge: To monitor the pressure inside the chamber. astm d3078 pdf 2021
As the chamber pressure drops, the internal pressure of the flexible package becomes significantly higher than the surrounding liquid pressure.
Note: Single, isolated bubbles adhering to the outside surface of the package upon submersion are normal air pockets and do not indicate a leak. A true leak produces a steady, repeating stream of bubbles. Step 5: Venting and Inspection ASTM standards are designated by a fixed number
The internal gas expands and forces its way out through any defects, cracks, or poor seals.
This test method is applicable to flexible packaging materials, including pouches, bags, and sachets. Common industries relying on this standard include: Sterile blister packs and pouches. Water: Serving as the submerged medium to detect bubbles
: The sample is placed under water inside the chamber.
Locating small breaches in the material itself.
: The year the technical committee re-evaluated and re-validated the protocol without structural changes.