This standard is a national recommended standard that comprehensively regulates the classification, naming, technical performance, test methods, inspection rules, packaging, storage, and transportation of petroleum resin products. It applies to petroleum resins produced from by-products of ethylene plants, such as cracked C5 and C9 fractions. Key testing items specified in the standard include softening point (typically determined by the ring-and-ball method), ash content, and color (hue). For these items, commonly used supporting testing instruments mainly include automatic softening point testers for determining the softening point, constant-temperature forced-air drying ovens for providing high-temperature environments, high-temperature muffle furnaces for ash content determination, as well as spectrophotometers and potentiometric titrators for analyzing color or determining acid value.