The ISO 22516 standard provides a practical method for determining the content of non-volatile matter and volatile matter in Paints and varnishes during application. The standard aims to evaluate the composition change of Coatings under practical application conditions. By measuring the content of non-volatile matter, the film formation mass is understood, and its environment emission characteristics are assessed by the content of volatile matter. The standard specifies the test equipment, operation procedures, data processing and result representation methods to ensure the scientific and Repeatability of the test.