This Part of EN 13523 describes the procedure for determining the behaviour of an organic coating on a metallic substrate (flat or bent specimens) when submitted to accelerated ageing by heating at a defined temperature for a defined period of time. It is not possible to test heat resistance in such way as to control all possible conditions of use. The aim of this test is therefore to furnish the basic test methods for the effect of heat. NOTE: Special applications may require that properties other than those mentioned in this part of EN 13523 be checked.