GB/T 8435-1998 Focus Spinning & weaving product color fastness test for severe acid felting. It specifies the scope of application in detail, specifies the need to configure a specific concentration of acidic solution, strictly regulates the operation process of Spinning & weaving product felting treatment under severe acidic conditions, covering key parameters such as temperature, duration and mechanical action strength, and also formulates a scientific result evaluation method. According to this standard test, the Color stability of Spinning & weaving products in harsh acidic felting environment can be accurately determined, which provides key support for Spinning & weaving enterprises to optimize the process and ensure the mass of products, and helps to improve the market competitiveness of products.