What is this standard about?
ISO 2409 discusses paints and varnishes. ISO 2409 specifies a test method for assessing the resistance of paint coatings and varnishes to separation from substrates.
Although ISO 2409 is primarily intended for use in the laboratory, it’s also suitable for field testing. The test can be carried out on finished objects and/or on specially prepared test specimens.
The method applies both to paint on hard (e.g. metal) and soft (e.g. wood and plaster) substrates. These different substrates need a different test procedure.
Who is this standard for?
ISO 2409 on paints and varnishes (cross-cut test) is useful for paint and coating manufacturers and anyone conducting laboratory or field testing of paints and varnishes, including:
- Suppliers of technology solutions to aerospace, rail and defence companies
- High precision engineering companies
- Door and window suppliers
- Aluminium product suppliers
- Metal façade experts
- Architectural powder coating manufacturers
- Furniture manufacturers
- Testing laboratories
- Metal finishing producers
- Paint manufacturers
Why should you use ISO 2409?
Peeling and flaking paint can not only spoil the appearance of a product, it can also affect the longevity and functioning of the product. ISO 2409 specifies the cross-cut test method for assessing separation resistance of paint coatings and varnishes. This test involves cutting a right-angle lattice patter into the coating, penetrating through to the substrate.
The cross-cut test method described in ISO 2409 helps you to identify the resistance of paint coatings and varnishes to wear and tear, that might happen over time. ISO 2409 also defines the classification of test results. This helps you to classify the quality level of paint and varnish coatings.
The method described can be used either as a quick pass/fail test or, where circumstances are appropriate, as a six-step classification test. When applied to a multi-coat system, assessment of the resistance to separation of individual layers of the coating from each other may be made.
What’s changed since the last update?
BS EN ISO 2409:2020 supersedes BS EN ISO 2409:2013, which is withdrawn. BS EN ISO 2409:2020 includes some technical changes with respect to BS EN ISO 2409:2013. These include:
- The general requirements for the use of single-cutting tools and multi-cutting tools have been updated
- References to commercially available cutters have been deleted
- Coating of the test panels has been deleted from Clause 7 because final test specimens are assumed
- Clause 3 and 4 has been added
- The text has been editorially revised and the normative references have been updated