Food packaging plays an important role in protecting the food inside from elements in the environment which could damage it. The integrity of the food packaging is as good as its seals. It is the reason why most leak detection tests focus on testing the packaging’s seals. Some tests require the use of Leak Detection Equipment while others don’t.
1. Dye Penetration Method
A dye penetration test is one of the simplest tests that you can use to determine the integrity of a seal. Another key advantage of this method is that you will be able to determine the specific area where the seal is weak. You can use this method to promote the perfections of seals too because they are key to a good looking packaging. In this test, you will leave a colored dye to be in contact with the seal for a specified period. After that, you will visually inspect if it managed to penetrate into the seals in the packaging.
2. Burst Point Method
A key characteristic of good seals is strength. It is because most food packaging will contain some air. As you know, the pressure of enclosed air is directly proportional to the temperature. It means when the temperature rises the pressure inside the packaging will rise. Therefore, if the seal is not strong, it could break and start leaking. Otherwise, it can burst and spill its contents. It is a failure that anyone would not desire to happen to their preferred food packaging. In this test, you will use a Leak Detection Equipment to determine the pressure at which the seal starts to fail. After that, you can strengthen them or reduce the amount of air you enclose in the packaging.
3. Helium Sniff Method
Here, you will use a helium sniffer as the Leak Detection Equipment. It is a simple method for detecting leaks in a package. First, you will fill the package with pressurized helium. After that, you will scan the package using the helium sniffer equipment. If there are any leaks, the equipment will detect a leakage of helium. It is a good method for pinpointing the exact location where the leakage is occurring.
4. Bubble Method
A bubble method is a simple way of detecting any leakages. A key benefit of this method is that it does not require the use of complex equipment. First, you will need to pressurize the package with air. If the package has a small opening, you can just use your mouth, just as you blow a balloon. After that, you will submerge the whole package in water. If the packaging you are testing is leaking, you will see some bubbles.