Hold the vacuum for the specified dwell time (typically 30–60 seconds, but can be longer per internal protocols).
is the active international standard for the Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission . This standard, which was reapproved in 2021, defines a critical visual inspection process used primarily to identify gross leaks in flexible or semi-rigid packaging that contains headspace gas. Core Purpose of ASTM D3078 astm d3078 pdf 2021
ASTM D3078-21 now includes specific guidance on the ratio of the vacuum chamber volume to package volume. Improper sizing (too large a chamber) can dampen the vacuum ramp rate, missing small leaks. Hold the vacuum for the specified dwell time