This part of ISO 6272 describes a method for evaluating the resistance of a dry film of paint, varnish or related
product to cracking or peeling from a substrate when it is subjected to a deformation caused by a falling weight, with
a 20-mm-diameter spherical indenter, dropped under standard conditions.
NOTE The term “impact resistance” is included in the title of this part of ISO 6272, but one important characteristic of the
apparatus used is that it should produce rapid deformation rather than a true impact.
The method described can be applied
— either as a pass/fail test, the test being carried out from one drop height and with a specified mass, so as to test
compliance with a particular specification;
— or as a classification test, to determine the minimum mass and/or drop height for which the coating cracks or
peels from its substrate by gradually increasing the drop height and/or the mass.
BS EN ISO 6272-1:2004 history
2011BS EN ISO 6272-1:2011 Paints and varnishes. Rapid-deformation (impact resistance) tests. Falling-weight test, large-area indenter
2004BS EN ISO 6272-1:2004 Paints and varnishes - Rapid-deformation (impact resistance) tests - Falling-weight test, large-area indenter