GB/T 7568.3-2008 specifies the relevant content of the polyamide fiber standard lining fabric in the Spinning & weaving product colour fastness test. The standard specifies the fiber characteristics, such as raw material source, molecular structure characteristics, etc. The yarn specifications, such as thread density, twist, as well as fabric structure, density, Appearance quality, etc. are specified in detail. By setting these standards, a unified and reliable polyamide lining fabric is provided for the Spinning & weaving product colour fastness test, ensuring the conformity and comparability of the results under different test conditions, and laying the foundation for the accuracy of the Spinning & weaving industry's colour fastness assessment.