Packaging Leak Testing: Common Mistakes & How to Avoid Them

Packaging Leak Testing: Common Mistakes & How to Avoid Them

Reliable leak testing is essential across food, beverage, pharmaceutical, medical device, and chemical industries. Yet many manufacturers still struggle with inconsistent results, false failures, and misjudged leak rates.
Below is a concise guide to the six most common mistakes in packaging leak testing, along with how to avoid them for greater accuracy and repeatability.

1. Incorrect Testing Method

Different packaging types require distinct testing approaches.
✔ Select appropriate methods for flexible, rigid, or high-barrier packaging
✔ Establish acceptable leakage rate standards
✔ Adhere to ASTM/ISO/GB testing protocols

2. Improper Sample Preparation

Contaminated, wrinkled, or unstable samples distort test results.
✔ Maintain clean, smooth seals
✔ Test samples from the same batch
✔ Control temperature and humidity conditions
✔ Establish uniform pre-test resting periods

3. Inaccurate Leakage Rate Requirements

Leakage limits vary by industry:
• Pharmaceutical packaging → Ultra-low leakage rates
• Food packaging → Moderate leakage sensitivity
• High-barrier films → Strict oxygen/moisture protection

✔ Ensure leak tester sensitivity meets specifications
✔ Validate leak limits based on safety and shelf life requirements

4. Uncalibrated or aged equipment

✔ Perform regular calibration
✔ Replace aged seals and tubing
✔ Maintain complete maintenance records

5. Neglecting test environment

Temperature, humidity, altitude, airflow, and vibration distort results
✔ Test under controlled conditions
✔ Stabilize samples before testing
✔ Record environmental data

6. Misinterpreted results and incomplete documentation

Human errors in interpretation may yield false results.
✔ Train operators
✔ Adopt clear, quantifiable pass/fail criteria
✔ Digitally record all test details for traceability