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International Standards

ISO 3035

Introducing ISO 3035 - Industrial Physics 

ISO 3035 is an ISO international crush testing method that’s used to determine the flat crush resistance of corrugated fibreboard.  

Fibreboard shipping containers can face compressive forces during the manufacturing process, as well as during shipment or storage. These forces can compress the flute structure and reduce the structural integrity (stacking strength) of the corrugated material. It’s important to understand a container’s resistance to this type of crushing. Flat crush testing helps you to understand a container’s characteristics. 

The ISO 3035 standard gives you a method to determine the flat crush resistance of corrugated fibreboard used in the manufacture of shipping containers. It’s applicable to single-faced and single-wall (double-faced) corrugated fibreboard. However, it’s not suitable for double-wall (double-double-faced) corrugated fibreboard. This is because the end-point of the test is not clearly defined or observable. 

ISO 3035 crush testing principle

During an ISO 3035 crush test you subject your corrugated fibreboard sample to an increasing force applied perpendicularly to the surface by a compression tester. This compression crush tester should have two flat and parallel platens and the crush test continues until the fluting collapses. Next up, you divide the maximum force sustained by the test piece by the area. 

Common ISO 3035 crush testing definitions to know 

There are a few definitions within ISO 3035 that you’ll need to understand to perform a successful crush test, these include: 

Flat crush: maximum crushing force, applied perpendicular to the surface of the fluting structure, sustained before complete collapse of the structure 

Collapse: the point where the sidewalls of the flutes are no longer able to support load because they have suffered compression damage 

Flat crush resistance: the flat crush divided by the area of the test piece under the condition of test. Flat crush resistance is expressed in kilopascals. 

Apparatus for ISO 3035 crush testing

There are certain pieces of apparatus that you’ll need to carry out a successful ISO 3035 crush test, all of which Industrial Physics can provide you with.  

Flat crush tester: a motor-driven, platen-type compression testing machine.

Cutting instrument: featuring a circularly guided knife to cut test pieces with the cut edges clean and perpendicular to the facings of the corrugated fibreboard.  

ISO 3035 crush testing equipment

So, how can Industrial Physics improve your ISO 3035 crush resistance testing? 

Crush Tester 17-56

The Crush Test 17-56 is a robust and easy-to-use crush tester. Exactly what you need when performing crush tests to ISO 3035 testing standards. Our crush tester is suitable for a wide variety of samples, including corrugated board, tubes, corrugated paper and plastics. The special sample holders extend the instrument's possibilities. The accuracy is achieved with a precision load cell, which is even accurate at low force values. 

Need ISO 3035 testing solutions? Get in touch

We’ve learnt a thing or two about crush resistance testing over the decades. Now Industrial Physics is recognized as a brand that likes to bring new, innovative crush testing equipment to market. 

We crush the competition when it comes to crush resistance testing and we like to share our knowledge. Across the knowledgebase section of our website we publish lots of blogs on related subjects. For example, why not have a look at this blog on compression and crush testing? Then you could try this piece which explores the reasons why manufacturers should consider switching to short-span compression testing. 

If you have any questions about ISO 3035 crush resistance testing and how we can help you, then please just get in touch!

Contact us - Industrial Physics

Your global test and inspection partner for ISO 3035