BS EN ISO 2409:2020 Paints and varnishes. Cross-cut test

BS EN ISO 2409:2020

Paints and varnishes. Cross-cut test

Status : Current   Published : September 2020



What is BS EN ISO 2409:2020 about?

This international standard details a way of testing how paint coatings resist separation when cut.

Who is BS EN ISO 2409:2020 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 products suppliers
  • Metal façade experts
  • Architectural powder coating manufacturers
  • Testing laboratories
  • Metal finishing producers

Why should you use BS EN ISO 2409:2020?

It describes a test method for assessing the resistance of paint coatings to separation from substrates when a right-angle lattice pattern is cut into the coating, penetrating through to the substrate.

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.

Although BS EN ISO 2409:2020 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.

Although 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.

NOTE: The method is not suitable for coatings of total thickness greater than 250 gm or for textured coatings. The method, when applied to coatings designed to give a rough patterned surface, will give results which will show too much variation.

 BS EN ISO 2409:2020 contributes to UN Sustainable Development Goal 9 on industry, innovation and infrastructure because it contributes to building resilient infrastructure.  

What’s new about BS EN ISO 2409:2020?

This is a revision of the 2013 version. The major changes in BS EN ISO 2409:2020 are:

a)       Clause 3 "Terms and definitions" has been added

b)      Clause 4 "Principle" has been added

c)       General requirements for the use of single- and multi-cutting tools have been updated

d)      References to commercially available cutters have been deleted

e)      Coating of the test panels has been deleted because final test specimen are assumed

f)       The text has been editorially revised and the normative references updated

Standard NumberBS EN ISO 2409:2020
TitlePaints and varnishes. Cross-cut test
Publication Date23 September 2020
Normative References(Required to achieve compliance to this standard)ISO 4618, ISO 2808, ISO 13076, ISO 15528, ISO 1513
Informative References(Provided for Information)ISO 16276-2, ISO 4624
ReplacesBS EN ISO 2409:2013
International RelationshipsEN ISO 2409:2020,ISO 2409:2020
Draft Superseded By19/30397052 DC
DescriptorsCross-cut test, Varnishes, Test equipment, Specimen preparation, Grading (quality), Coatings, Adhesion tests, Testing conditions, Test specimens, Paints
Title in FrenchPeintures et vernis. Essai de quadrillage
Title in GermanBeschichtungsstoffe. Gitterschnittprüfung
ISBN978 0 539 05237 4
File Size1.775 MB

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