M00019107
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ISO FDIS 2409 2012 Edition, October 25, 2012 PAINTS AND VARNISHES - CROSS-CUT TEST
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Availability date: 07/14/2021
Description / Abstract:
This International Standard specifies 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 property
measured by this empirical test procedure depends, among other
factors, on the adhesion of the coating to either the preceding
coat or the substrate. This procedure is not to be regarded,
however, as a means of measuring adhesion.
Where a measurements of adhesion is required, the method
described in ISO 4324[1] can be used.
NOTE 1 Although the test is primarily intended for use in the
laboratory, the test is also suitable for field testing.
The method described can be used either as a 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 can be made.
The test can be carried out on finished objects and/or on
specially prepared test specimens.
Although the method is applied to paint on hard (e.g. metal) and
soft (e.g. wood and plaster) substrates, these different substrates
need a different test procedure (see Clause 6).
The method is not suitable for coatings of total thickness
greater than 250 μm or for textured coatings.
NOTE 2 The method, when applied to coatings designed to give a
rough patterned surface, will give results which will show too much
variation (see also ISO 16276-2[2]).
1) This is an example of a suitable product available
commercially. This information is given for the convenience of
users of this International Standard and does not constitute an
endorsement by ISO of this product.