ISO 1519

Introducing ISO 1519 – Industrial Physics

ISO 1519 is an international ISO bend test for paints and varnishes using a cylindrical mandrel bend tester. 

The International Organization of Standards (ISO) produce a wide range of ISO standards to guide manufacturers, production lines and laboratories when checking the integrity of packaging, products, and materials across many industries.  

The ISO 1519 cylindrical bend test gives you an empirical test procedure to assess the resistance of a coating of paint or varnish to cracking or detachment from a metal or plastic substrate. The paint or varnish sample is bent around a cylindrical mandrel under standard conditions. 

This cylindrical bend test method is ideal for single coat systems, but it can also be used with multi-coat systems. You can test the complete system, or each coat can be tested separately.  

To assess a coating’s compliance with a particular requirement you can use the ISO 1519 bend test method as a “pass / fail” test using a single specified size of mandrel. Alternatively, you can repeat the procedure using successively smaller mandrels. Taking the second approach, you determine the diameter of the first mandrel over which the coating cracks and / or becomes detached from the substrate. 

The two types of ISO 1519 cylindrical bend testing apparatus

In the ISO 1519 cylindrical bend test there’s two types of apparatus specified: 

• ISO 1519 test type one: appropriate for use on test panels of thickness up to 0.3 mm 

• ISO 1519 test type two: for use on test panels of thickness up to 1.0 mm. 

Both types of ISO 1519 cylindrical bend testing apparatus offer similar results with the same coating. However, typically only one will be used. 

Our ISO 1519 coating testing equipment  

So, how can Industrial Physics improve your ISO 1519 cylindrical bend testing? 

TQC Sheen Cylindrical Mandrel Bend Test including Mandrel Set
The TQC Sheen Cylindrical Mandrel Bend Tester helps you to understand the elasticity, adhesion and elongation properties of paint film applied to sheet metal surfaces. 

TQC Sheen is our paint testing specialist brand and the cylindrical bend test has been developed in accordance with international testing standards, including ISO 1519. 

Be sure to check out some more of the paint testing equipment from across the Industrial Physics portfolio. 

Need paint testing solutions? Get in touch

We’ve learnt a thing or two about paint testing over the decades. We like to share our knowledge and we’re here to help you to answer your questions. Across the knowledgebase section of our website we publish lots of blogs on related subjects.   

For example, there’s this blog – the impact of additives in paint and coatings. Then you could check out this one on bend and flex testing standards.  

If you have any questions about ISO 1519 cylindrical mandrel bend testing, or any aspect of your coating testing – then just get in touch!

Your global test and measurement partner for ISO 1519