![]() ![]() Furthermore, the results are not reproducible unless coaxial alignment of the tensile forces is ensured. NOTE The results can be influenced by the test assembly used. The type of instrument shall be reported in the test report, because hand-driven/mechanical/ hydraulic instruments are reported to produce widely different results. Instead of a tensile tester, other types of pull-off adhesion testers (mechanically, pneumatically, hydraulically or hand-driven) may be used provided that they give similar results. Suitable designs for applying the tensile stress are shown in Figures 1 and 2. ![]() The tensile stress shall be applied in a direction perpendicular to the plane of the coated substrate and shall be increased at a substantially uniform rate, not greater than 1 MPa/s1) such that failure of the test assembly occurs within 90 s. Tensile tester, suitable for carrying out the chosen procedure specified in Clause 8. ![]() ISO 4624:2016 pdf free.Paints and varnishes – Pull-off test for adhesion ![]()
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