4G packaging is a term used for fibreboard boxes that have been UN approved. It is displayed in the UN specification mark that is assigned to the packaging. In this case, 4 denotes that the package is a box and the G denotes that it is made of fibreboard.

UN specification marks indicate that the packaging corresponds to a successfully tested design type and that it complies with the relevant provisions set out in dangerous goods regulations. It allows businesses, shippers, handlers and appropriate authorities to identify the type of packaging and a number of performance related information. Further details of performance criteria which the packaging meets can be found on the test certificate.

You can learn more about UN specification marks here.

The term 4G cardboard box when used in relation to UN approved packaging is technically incorrect terminology. The correct description is 4G Fibreboard Box. It is a form of outer packaging that is used for the shipment of dangerous goods.

4G boxes are used to house specific inner packaging that dangerous goods are stored in such as glass or plastic bottles or plastic drums. 4G boxes are tested with specific inners and once approved, those inner types must be used within the 4G box, using any other inner type will invalidate the UN test certification.

For example, if the 4G box was tested and UN certified with 4x 100ml glass bottles, then you must use these inners. You cannot use the same box for 2 x 200ml plastic bottles as these have not been tested for use with this box.

The 4g box would act as a layer of protection for the inner packaging and goods being transported, and prevent damages occurring from knocks or drops during handling and transport.

At the same time, it prevents any leaks from escaping the container and being released. This is especially important when you consider that potentially harmful materials may be being shipped.

The UN have a specific performance criterion that 4G packages must be able to meet in order to qualify as UN approved 4G packaging.

Tests vary depending on the dangerous goods classification permitted but can include, water, drop, stack, vibration, and leak testing to simulate how the material would perform under real life transport conditions.

As 4G boxes are examples of outer packaging, the materials are often tested and approved for use with specific inner packaging materials (including absorbent materials). If this is the case, then you must ensure that you are using an approved combination of inner and outer packaging before transport.

On top of this, the package must be assembled as it was during testing. We provide accurate assembly instructions with all orders of our 4g boxes so that our customers can rest assured that they are shipping their goods safely.