ASTM D3078

Test Materials:
ASTM D3078 specifies that the primary test materials include packaging materials, such as films, foils, and composite structures. These materials should be representative of the production lot and adequately prepared to ensure consistent results. A test specimen must be selected from the packaging to undergo the leak test.

Test Process:
The test process involves placing the prepared specimen into a test chamber filled with water or a specific liquid medium. The chamber is then subjected to a vacuum, allowing any potential leaks to be identified through bubble formation. The test duration and conditions should adhere strictly to the guidelines outlined in ASTM D3078 to ensure reliability.

Test Result Interpretation:
Results are interpreted by assessing the presence and size of bubbles produced during the vacuum phase. The formation of bubbles indicates the location and severity of leaks. A quantitative measure may be established based on the size and frequency of the bubbles, allowing for comparison against acceptable leak rates specified in the standards.