This standard was issued by General Motors (GM) in 1988. It specifies the technical requirements and application specifications of thermal carbon thermal inks, which are applicable to printing materials such as labels, strips and color ribbon. Thermal inks can change Color or display text when heating, and are widely used in temperature indicator labels, food freshness labels and industrial labels. The standard specifies the performance indicators (such as Sensitivity, Resolution, Durability, etc.) and test methods of inks to ensure their Stability and Reliability in different environments.