BS 3748

Introducing BS 3748 – Industrial Physics

BS 3748 is a global BSI method that was developed to determine the bending resistance of paper and board.  

The British Standards (BS) are the testing standards produced by the BSI Group, which is incorporated under a royal charter, formally designated as the national standards body (NSB) for the UK.  

The BS 3748 crease testing and board stiffness testing standard specifies a method, based on the beam principle. Crease testing and board stiffness testing are useful inspections for industries of carton board, paper, printing and packaging.  

The relationship between board stiffness and crease recovery (spring back) is an important factor in the performance of cartons on high-speed packaging machines and in manual folding. 

BS 3748 bending stiffness testing methods

The BS 3748 test involves measuring the force in grams needed to deflect a test piece of board through an angle of 15°, when applied at a bending length of 5cm from the fixed end. The crease recovery is determined by holding a formed crease at 90° and measuring the recovery force after 15 seconds. 

When manufacturing paper and board packaging it’s crucial to have the creases in boards correctly positioned and in a uniform fashion. The crease recovery (spring back) can result in forces, which distort the carton or cause stresses to be applied to closures, reducing their effectiveness. 

Industrial Physics bending stiffness testing devices

So, how can Industrial Physics improve your BS 3748 bending stiffness testing? 

Messmer Büchel Crease and Board 79-15 

If you need to accurately measure the crease and board stiffness of a range of paper-based samples to BS 3748 standards, the Crease and Board 79-15 wraps up all of your requirements. 

Developed by Messmer Büchel, our specialist physical properties inspection company, our crease and board stiffness tester measures crease line, bending resistance and spring back.  

Need BS 3748 testing solutions? Get in touch

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

We like to share our knowledge and we’re here to help you to answer your questions about board stiffness testing. Across the knowledgebase section of our website we publish lots of blogs on related subjects.   

First up, why not try this blog that provides useful information for paper strength testing. Then you could download our whitepaper that covers physical testing application information of paper and board. 

If you have any questions about BS 3748 board stiffness testing and how we can help you with your flexible packaging testing, then please just get in touch!  

Your global test and measurement partner for BS 3748