This standard specifies a method for evaluating the heat resistance of dry pigment powders under specific temperature conditions. The degree of heat resistance of pigment powders is evaluated by comparing their color difference with the original sample after being placed at a predetermined temperature for a certain period of time. The test temperature is every 20 ° C below 200 ° C, and every 50 ° C above 200 ° C. After determination, the sample and the untreated sample are applied to pictorial printing paper with an Ink knife, and the color change is observed to determine the heat resistance temperature of the pigment. This method is suitable for evaluating the heat resistance of various pigments to ensure their color Stability and application life in high temperature environments. This guide highlights the purpose of the standard test, the method steps, and the materials and equipment required to understand and apply to the determination of heat resistance in dry pigment powders.