GB/T 2408 - 2008 is used to determine the combustion performance of plastics, covering the horizontal method and the vertical method. The standard describes the testing principle of the two methods, specifies the technical parameters of the required equipment, such as combustion tank, gas source, etc., and details the preparation of plastic samples, including size, quantity and pretreatment. Specify the horizontal and vertical test processes, such as ignition method, observation content and judgment criteria. Through this standard, the combustion characteristics of plastics in different directions can be comprehensively evaluated, providing a unified detection basis for plastic production and application industries, and helping to improve the fire safety of plastic products.