Testing Methods
Manufacturers have the option of carrying out a range of tests, each with its own advantages. Destructive tests, such as the blue dye method, are most suitable for mass produced items where cost is negligible, whereas non-destructive tests such as force decay allow for the reintroduction of products to the production line, eliminating loss of capital and allowing for greater batch testing.
Please contact Dynascan for further information on our testing methods or to discuss your requirements further.
Standard Test Methods
Altitude Simulation
Transporting goods at altitude can induce stresses on packaging or products. Companies may require transport routes to go through high altitude, mountainous areas or via aircraft.
Altitude simulation testing can verify that packaging will be able to withstand the journey in addition to certifying that components remain functional throughout the journey.
Blue Dye Test
Methylene Blue Dye testing is an industry standard, destructive test by where packaging is submerged within a blue dye solution within a chamber. The chamber is placed under a vacuum and once air is readmitted it forces the dye into the pack, should any holes be present.
It has been proven to be a popular method of package testing due to its simple, effective and reliable results, in addition to low capital costs.
Bubble Emission
When carrying out a bubble emissions assessment, the chamber is filled with water prior to testing. During the test phase, the head-space will be placed under vacuum, causing the package to inflate.
Should any leaks be present within the packaging, a stream of bubbles will be emitted, allowing the user to easily pinpoint the exact location of the hole.
Force Decay
Force decay testing submits packaging, within the sensor assemblies of a sealed chamber, to a vacuum. This causes the packaging to expand and exert a vertical force between a reaction plate and a load cell.
Flawless packaging will generate a force that increases as the vacuum builds and after some settling maintains at a relatively fixed level for a period of time. Faulty packs may generate an initial force, but any holes will cause this to decay as the package inflates. A pack with a major leak is unlikely to generate any observable initial force.