Bubble Tests vs. Precision: Upgrading Your Quality Control In the late 20th century, bubble leak testing was widely used for leak detection in flexible packaging due to its low cost and ease of operation. However, with the rise of pharmaceuticals, medical devices, precision electronics, and high-value products, traditional leak testing methods have struggled to detect minute leaks—leaks that can directly impact product quality and compromise the sterility barrier. Next, let’s explore the true meaning of “high-precision” leak testing, who absolutely needs it, and why traditional bubble testing is no longer sufficient. What Qualifies as “High-Precision” Leak Testing? High-precision leak testing no longer relies on visual inspection but instead depends entirely on quantitative, deterministic methods.  Leak Detection Accuracy: Traditional bubble leak testing can detect relatively large micro-leaks, but high-precision leak testing can detect leaks as small as the micrometer range (Saicheng’s no

leak tester can detect leaks as small as one micrometer). • Quantitativeness: Using high-precision sensors to monitor pressure changes in real time and generate data reports allows for an accurate understanding of the leak rate. • Compliance: Meets strict international standards, such as ASTM F2338 (vacuum decay) or USP <1207> (sterile drug packaging). Not all industries are required to use high-precision leak testing; for products such as shampoo pouches and moisture-proof shipping bags, standard testing is entirely sufficient. Special attention should be given to the following products: • Pharmaceuticals...

performance—and may even lead to safety risks and product recalls. • High-value Food Packaging: These products typically have longer shelf lives and higher quality requirements. Even minor leaks can allow oxygen, water vapor, or microorganisms to enter, causing product spoilage and compromising safety and stability. For some high-value and high-risk products, the traditional bubble emission test is indeed no longer sufficient. However, for applications with a low risk of leakage, less stringent regulatory requirements, lower product value, or where only obvious leaks need to be detected, the...

samples cannot be returned to the production line after testing. For high-value products, this increases costs.  Inability to Detect Microscopic Leaks: It is suitable for detecting larger leaks but struggles to identify microscopic ones. The Modern Alternative: Vacuum Decay & CCIT Manufacturers of high-value and high-risk products are gradually shifting away from traditional bubble leak testing toward deterministic testing methods. The most commonly used advanced deterministic method for container seal integrity testing is the vacuum decay test.

The principle behind this method involves placing the test sample in a test chamber, evacuating the chamber to create a vacuum, and using advanced sensors to monitor pressure changes in real time, providing quantitative data. A drop in vacuum level indicates a leak. Saicheng’s non-destructive leak tester strictly complies with international standards such as ASTM F2338 and USP 1207, providing quantitative, reliable, and repeatable test results. Equipped with advanced sensors, it can detect micro-leaks as small as a few micrometers, ensuring the accuracy of the results. If your team is seeking...