Astm D3078 Pdf 2021 !!install!! · Essential & Instant

| Observation | Interpretation | |-------------|----------------| | Single bubble burst | Usually trapped air – ignore | | Steady small bubbles from seal edge | Pin-hole or channel leak | | Large bubbles from corner | Gross leak or open seal | | Bubbles from package surface only | Porous material (expected) | | Fogging or bubbles from water itself | Degassing – let water sit 30 min before test | | Bubbles only during vacuum rise | Temporary seal opening – report as leak |