Astm — D3078 Pdf 2021

Slowly increase the vacuum level. Watch the pack closely for a steady stream of bubbles.

Bubbles may stick to the package surface due to surface tension, giving false negatives.

Place the pack under the submerging matrix. Ensure it is covered by at least 1 inch (25 mm) of water. astm d3078 pdf 2021

ASTM D3078-21, Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission , ASTM International, West Conshohocken, PA, 2021, DOI: 10.1520/D3078-21.

The size of the leak that can be detected depends on multiple variables: Slowly increase the vacuum level

Understanding ASTM D3078-02(2021): Bubble Emission Test for Flexible Packaging

: If a package is vacuum-packed with zero headspace, there is no air to "push out," making this test ineffective. Place the pack under the submerging matrix

The vacuum chamber must be capable of withstanding approximately one atmosphere of pressure differential (about 101 kPa or 14.7 psi), fitted with a vacuum-tight cover. Transparency is critical because the operator must observe bubble formation during the test.