The ISO 2 2553-9: 2020 standard defines a test method for determining the volatile content of electrodeposited coatings during stoving. This method is suitable for electrodeposited coatings in the automotive industry and Miscellaneous industrial applications, such as chill down devices, consumer products, etc. The standard emphasizes that the measurement result of stoving loss is relative and depends on the temperature and time of the test, not the absolute value. The test evaluates the volatile release of coatings under high temperature conditions by calculating the relative mass loss factor, the relative reaction loss factor and the total stoving loss factor. This part of the standard provides a technical basis for quality control during the production and application of coatings.