This standard specifies the detection and evaluation methods for the anti-perspective performance of Spinning & weaving products. It aims to ensure the ability of Spinning & weaving products to protect privacy and security during use. The standard covers the definition, test methods and evaluation criteria of anti-perspective performance. Evaluate the anti-perspective ability of Spinning & weaving products by measuring the indicators such as light transmitance, pattern and text visibility under specific conditions. It is suitable for all kinds of Spinning & weaving products, such as curtains, partition cloths, decorative fabrics, etc., especially in places and applications that need to protect personal privacy. The implementation of this standard helps consumers choose the right Spinning & Weaving products that meet their privacy protection needs at the time of purchase, and at the same time promotes the mass improvement of products and technological advancements in the industry.