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Standard [CURRENT]
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This International Standard specifies an empirical test procedure for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal or plastics substrate when subjected to bending round a cylindrical mandrel under standard conditions. For a multi-coat system, each coat can be tested separately or the complete system can be tested. The method specified can be carried out - either as a "pass/fail" test, by carrying out the test with a single specified size of mandrel, to assess compliance with a particular requirement; - or by repeating the procedure using successively smaller mandrels to determine the diameter of the first mandrel over which the coating cracks and/or becomes detached from the substrate. Two types of apparatus are specified. Type 1 is appropriate for use on test panels of thickness up to 0,3 mm, and type 2 for use on test panels of thickness up to 1,0 mm. Both types of apparatus have been found to give similar results with the same coating. Normally, only one type of apparatus will be used for testing a given product, however. The other five standards are: - ISO 1520, Paints and varnishes - Cupping test, - ISO 6272-1, Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 1: Falling-weight test, large-area indenter - ISO 6272-2, Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 2: Falling-weight test, small-area indenter - ISO 6860, Paints and varnishes - Bend test (conical mandrel) - ISO 17132, Paints and varnishes - T-bend test. The method to be chosen will depend on the property to be measured and on agreement between the interested parties. In principle, all these tests differ from each other technically and in their accuracy. The Committee responsible for this standard is NA 002-00-07 AA "Allgemeine Prüfverfahren für Beschichtungsstoffe und Beschichtungen" ("General test methods for coating materials and coatings") at DIN.
This document replaces DIN EN ISO 1519:2003-10 .