GB/T 29333-2012 "In-mold decoration (IMD) hardened film, determination method of moisture resistance heat aging performance" stipulates the aging performance measurement method of in-mold decoration polyester hardened film under heat and humidity conditions. The standard is applicable to IMD hardened films of different Hardness and thickness. The aging performance is evaluated by simulating the heat and humidity environment, which provides a technical basis for the quality control and performance assurance of IMD products. It is widely used in the testing of decorative materials in the automotive, electronics and other industries.