If a leak exists, internal air will escape, creating a continuous or localized stream of bubbles.
ASTM standards are and not freely available. To get the official PDF:
Detecting structural failures in multi-layer packaging. The Testing Principle astm d3078 pdf 2021
| | Value/Recommendation | |---|---| | Vacuum ramp rate | ~1 inch Hg per second | | Minimum dwell time | 30 seconds | | Common vacuum levels | 12, 18.5, or 24.5 inches Hg (approx. 40–83 kPa) depending on packaging type | | Working vacuum recommendation | ~70% of package failure pressure | | Test fluid | Water (typically) or other non-degrading fluid |
Comprehensive Guide to ASTM D3078: Bubble Emission Leak Testing for Flexible Packaging If a leak exists, internal air will escape,
: Capable of detecting leaks down to approximately 1 x 10⁻⁵ atm cm³/s . The 2021 Update: What Changed?
A practical industry recommendation is to use approximately 70% of the package's failure pressure as the working vacuum level. For example, if a package fails at –70 kPa, a practical test level would be around –50 kPa. The Testing Principle | | Value/Recommendation | |---|---|
The test is applicable to any non-porous, flexible packaging that contains a headspace of gas—including pouches, bags, and other sealed flexible containers.
Implementing ASTM D3078 into your quality control processes offers several tangible benefits:
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Avoid free PDFs from unknown websites – they are often outdated (D3078-02(2013) or fake), and using them for compliance is invalid.