Paints and varnishes. Pull-off test for adhesion
Paints and varnishes. Pull-off test for adhesion
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What is ISO 4624 - P ull off test in paints standard about?
The adhesion of a coating or several coated samples of any paint product is measured by assessing the minimum tensile stress needed to detach or rupture the coating perpendicular to the substrate. ISO 4624 is one of two standards which describe methods for assessing the adhesion of a single coating or a multi-coat system of paint, varnish, or related product by measuring the minimum tensile stress necessary to detach or to rupture the coating in a direction perpendicular to the substrate. The test result is influenced not only by the mechanical properties of the system under test but also by the nature and preparation of the substrate, the method of paint application, the drying conditions of the coating, the temperature, the humidity and other factors like the type of test instrument which has been used. ISO 4624
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