This standard specifies the method for determining the dropping point of petroleum wax and petrolatum. The principle of the manual method involves placing a thermometer coated with the sample into a test tube, heating it in a water bath until the sample melts and the first drop falls from the mercury bulb of the thermometer. The core instruments required for this method include a water bath with heating and temperature control systems, specialized test tubes, and precision thermometers. A stirring device may also be configured to ensure uniform bath temperature. In addition to the manual method, this standard also covers automatic dropping point testers, which automatically perform the determination by heating a perforated sample cup and monitoring the temperature at which the sample drops, thereby improving testing efficiency and result objectivity.